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Synthesis and Characterization of Poly(butylene adipate-co-terephthalate) Catalyzed by Rare Earth Stearates 被引量:3
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作者 朱魁 朱蔚璞 +3 位作者 顾燕波 沈之荃 陈伟 祝桂香 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2007年第10期1581-1583,共3页
Rare earth (Nd, Y, La, Dy) stearates have been synthesized and used as single component catalysts for the polycondensation of dimethyl terephthalate, adipic acid and 1,4-butanediol for the first time preparing biode... Rare earth (Nd, Y, La, Dy) stearates have been synthesized and used as single component catalysts for the polycondensation of dimethyl terephthalate, adipic acid and 1,4-butanediol for the first time preparing biodegradable poly(butylene adipate-co-terephthalate) (PBAT) with high molecular weight, The microstructures of PBAT were characterized by ^1H NMR spectra. The PBAT exhibits good mechanical properties such as high tensile strength (ca. 20 MPa) and long break elongation (〉700%). 展开更多
关键词 rare earth stearate poly(butylene adipate-co-terephthalate) polycondensation
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Enhanced Crystallization of Poly(butylene adipate-co-terephthalate)by a Self-assembly Nucleating Agent
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作者 Cheng Zhou Kun Chen +4 位作者 Zi-Heng Zhang Meng-Fan Jing Chun-Tai Liu Chang-Yu Shen Ya-Ming Wang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2024年第5期663-674,I0010,共13页
Poly(butylene adipate-co-terephthalate)(PBAT)is a promising biodegradable flexible polymer but suffers from slow crystallization rate,making it less attractive for some applications like the injection-molded products ... Poly(butylene adipate-co-terephthalate)(PBAT)is a promising biodegradable flexible polymer but suffers from slow crystallization rate,making it less attractive for some applications like the injection-molded products in comparison with low-density polyethylene(LDPE).This work aimed to accelerate the crystallization of PBAT by adding a self-assembly nucleating agent octamethylenedicarboxylic dibenzoylhydrazide(OMBH).PBAT/OMBH composites with various OMBH contents(0 wt%,0.5 wt%,0.7 wt%,1 wt%,2 wt%,3 wt%and 5 wt%)were prepared through melt-mixing.The effect of OMBH on the crystallization behavior,morphologies and mechanical properties of PBAT was investigated.The highest nucleation efficiency value of 59.6%was achieved for PBAT with 0.7 wt%OMBH,much higher than that of 22.7%for PBAT with 0.7 wt%talc.Atomic force microscopy results showed that OMBH formed fine fibers and induced the formation of transcrystalline layers of PBAT.Fourier transform infrared spectroscopy(FTIR)combined with two-dimensional correlation spectra suggested that the intermolecular dipole-dipole N—H…O=C interactions but not hydrogen bond between OMBH and PBAT promoted the crystallization of PBAT in the initial period of crystallization.The presence of OMBH did not change the crystal form of PBAT but had positive contribution in enhancing its crystallinity and mechanical properties.This work is essential for preparing PBAT with high crystallization rate,enhancing its potential applications in injection-molded products. 展开更多
关键词 poly(butylene adipate-co-terephthalate) Biodegradable Self-assembly nucleating agent CRYSTALLIZATION
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Alkylpolyglycoside inducing poly (butylene terephthalate) non-woven graft copolymerization of chitosan
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作者 陈叶廷 施婷婷 +4 位作者 祁姗姗 杨牧 孟娜 龚祝南 黄斌 《Journal of Southeast University(English Edition)》 EI CAS 2012年第4期474-479,共6页
In order to improve the wettability and biocompatibility of the poly (butylene terephthalate) non-woven (PBTNW), the method of surface modification is used to graft copolymerization of chitosan (CS) onto the PBT... In order to improve the wettability and biocompatibility of the poly (butylene terephthalate) non-woven (PBTNW), the method of surface modification is used to graft copolymerization of chitosan (CS) onto the PBTNW under alkylpolyglycoside (APG) inducing. The product is thoroughly characterized with the Fourier transform infrared spectroscopy (FrIR), the electron spectroscopy for chemical analysis (ESCA), the thermogravimetric (TG) and the scanning electron microscopy (SEM). It is found that chitosan is successfully grafted onto PBTNW. In addition, the water contact angles, hemolysis tests and cytotoxicity evaluation tests show an improvement in wettability and biocompatihility as a result of graft copolymerization of chitosan. So the CS-grafted PBTNW exhibits greater superiority than the original PBTNW. The CS-grafted PBTNW can be a candidate for blood filter materials and other medical applications. 展开更多
关键词 CHITOSAN GRAFT poly (butylene terephthalate) non- woven alkylpolyglycoside biocompatibility WETTABILITY
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Enzymatic Degradation of Poly(butylenesuccinate)/Thermoplastic Starch Blend 被引量:2
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作者 Anna Kundys Justyna Ostrowska +3 位作者 Urszula Chojnacka Zuzanna Grodzka Aleksandra Lange Magdalena Paluch 《Journal of Renewable Materials》 SCIE 2018年第6期611-618,共8页
The degradation of thermoplastic starch blend in the presence of commerciala-amylase and unpurified amylase of microbial origin was investigated.The blends consisting of thermoplastic starch and poly(butylene succinat... The degradation of thermoplastic starch blend in the presence of commerciala-amylase and unpurified amylase of microbial origin was investigated.The blends consisting of thermoplastic starch and poly(butylene succinate)have potential use in packaging applications thus,it is essential to establish susceptibility to degradation.Molar mass loss,gravimetric weight loss,and molecular structure were evaluated.The changes in the surface were observed with scanning electron microscopy.It was confirmed that there was a significant difference in gravimetric weight loss between the blends degraded in two different solutions.Unpurified enzymes of microbial origin,produced by Rhizopus oryzae cultures decomposed analyzed materials more efficiently than purified commercial ones.Moreover,it was proved that in applied conditions,the molar mass of PBS fraction did not change significantly. 展开更多
关键词 poly(butylene succinate) STARCH a-amylase Rhizopus oryzae UREA
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Improving Polylactide Toughness by Plasticizing with Low Molecular Weight Polylactide-Poly(Butylene Succinate)Copolymer 被引量:1
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作者 Yottha Srithep Onpreeya Veang-in +2 位作者 Dutchanee Pholharn Lih-Sheng Turng John Morris 《Journal of Renewable Materials》 SCIE EI 2021年第7期1267-1281,共15页
A low-molecular-weight polylactide-poly(butylene succinate)(PLA-PBS)copolymer was synthesized and incorporated into polylactide(PLA)as a novel toughening agent by solvent casting.The copolymer had the same chemical ... A low-molecular-weight polylactide-poly(butylene succinate)(PLA-PBS)copolymer was synthesized and incorporated into polylactide(PLA)as a novel toughening agent by solvent casting.The copolymer had the same chemical structure and function as PLA and it was used as a plasticizer to PLA.The copolymer was blended with PLA at a weight ratio from 2 to 10 wt%.Phase separation between PLA and PLA-PBS was not observed from their scanning electron microscopy(SEM)images and the crystal structure of PLA almost remained unchanged based on the X-ray diffraction(XRD)measurement.The melt flow index(MFI)of the blends was higher as the amount of PLA-PBS increased,indicating that the block copolymer did improve the mobility of the PLA chains.Moreover,tensile tests revealed that PLA with greater PLA-PBS copolymer exhibited higher elongation at break and it reached the maximum at 8 wt%of PLA-PBS in PLA,which was around 6 times higher than that of pure PLA.Furthermore,the glass transition temperature,measured by differential scanning calorimetry(DSC),markedly decreased with an increasing amount of the copolymer as it decreased from 61.2℃ for pure PLA to 41.3℃when it was blended with 10 wt%PLA-PBS copolymer.Therefore,the PLA-PBS copolymer was shown to be a promising plasticizer for fully biobased and toughened PLA. 展开更多
关键词 polyLACTIDE poly(butylene succinate) low molecular weight copolymer BIODEGRADABILITY PLASTICIZER
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DSC Study of Thermal Properties of Biodegradable Poly(Butylene Succinate-co-terephthalate) 被引量:1
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作者 李发学 尹灵芝 俞建勇 《Journal of Donghua University(English Edition)》 EI CAS 2006年第3期5-7,共3页
Poly ( butylene succinate ) ( PBS ), poly ( butylene terephthalate) (PBT) and poly (butylene succirmte-coterephthalate) (PBST)s were synthesized from dimethyl succinate and/or dimethyl terephthalate reacti... Poly ( butylene succinate ) ( PBS ), poly ( butylene terephthalate) (PBT) and poly (butylene succirmte-coterephthalate) (PBST)s were synthesized from dimethyl succinate and/or dimethyl terephthalate reacting with 1,4- butanediol through a process of transesterification/ polycondmsation in the presence of a high effective catalyst and characterized by means of GPC and DSC. The investigation was mainly focused on the influence of content of terephthalate units on the molecular weight and thermal properties of resulting polymers. It is revealed that the melting temperature and crystallinity of synthesized polymers decrease first with the increase of terephthalate units, then shift to rise gradually by DSC measurements. The results of Flory equation suggest sequence structure of PBSTs is random. 展开更多
关键词 poly butylene succinate-co-terephthalate )(PBST) average molecular weight melting temperature crystallinit y.
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Nanocellulose: Effect on Thermal, Structural, Molecular Mobility and Rheological Characteristics of Poly(Butylenes Adipate-Co-Butylene Terephthalate) Nanocomposites 被引量:1
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作者 Gerson Alberto Valencia Albitres Francisco Pereira Araujo Junior +3 位作者 Daniela França Silva Freitas Danielle Mattos Mariano Maria Ines Bruno Tavares Luis Claudio Mendes 《Materials Sciences and Applications》 2022年第4期249-277,共29页
The concern with environmental preservation is a very current and relevant topic. Regarding polymers, the search for potentially ecofriendly matters has been the subject of scientific research. In this context, this w... The concern with environmental preservation is a very current and relevant topic. Regarding polymers, the search for potentially ecofriendly matters has been the subject of scientific research. In this context, this work aimed to study the effect of adding nanocellulose (nCE) with 1, 3, and 5 wt.% on poly(butylene adipate-co-butylene terephthalate) (PBAT). Thermal, structural, relaxometric, and rheological assessments were carried out. Quantitative evaluation of PBAT copolymer by high field NMR revealed 56.4 and 43.6 m.% of the butylene adipate and butylene terephthalate segments, respectively. WAXD measurement on the deconvoluted diffraction patterns identified that nCE was a mixing of Cellulose I and Cellulose II polymorph structures. At any composition, nanocellulose interfered with the PBAT crystallisation process. Also, a series of new PBAT crystallographic planes appeared as a function of nanocellulose content. PBAT hydrogen molecular relaxation varied randomly with nanocellulose content and had a strong effect on the hydrogen relaxation. PBAT cold crystallisation and melting temperatures (T<sub>cc</sub> and T<sub>m</sub>) were almost unchangeable. Although T<sub>cc</sub> did not change during polymer solidification from PBAT molten state, the sample’s degree of crystallinity varied with composition through the transcrystallization phenomenon. Nanocomposite thermal stability decreased possibly owing to the catalytic action of sulfonated amorphous cellulose chains. For the sample with 3 wt.% of nanocellulose, the highest values of complex viscosity and storage modulus were achieved. 展开更多
关键词 NANOCELLULOSE poly(butylene Adipate-Co-butylene Terephthalate) Molecular Relaxation Nanocomposite
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TRANSESTERIFICATION OF POLY(BISPHENOL A CARBONATE) WITH AROMATIC AND ALIPHATIC SEGMENTS IN BUTYLENE TEREPHTHALATE-CAPROLACTONE COPOLYESTER
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作者 马德柱 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2004年第4期333-341,共9页
In this article, the transesterification of poly(bisphenol A carbonate) (PC) with butylene terephthalate-caprolactone copolyester at a weight ratio 50/50 (BCL(21)) was thoroughly investigated by proton nuclear magneti... In this article, the transesterification of poly(bisphenol A carbonate) (PC) with butylene terephthalate-caprolactone copolyester at a weight ratio 50/50 (BCL(21)) was thoroughly investigated by proton nuclear magnetic resonance spectroscopy ('H-NMR), in conjunction with a model compound. The 1 H-NMR results of the annealed blend PC/BCL(21) show that the formation of bisphenol A-terephthalate ester units is the same as in the annealed blend of PC with PBT, and the transesterification actually occurs between PC and butylene terephthalate (BT) segments in BCL(21). By comparison with the model compound bisphenol A dibutyrate, the new signal appearing at δ= 2.56 in the 1H-NMR spectrum confirms the existence of bisphenol A caprolactone ester units resulting from the exchange reaction of PC with caprolactone (CL) segments. 1H-NMR analysis of the transesterification rates reveals that the reaction of PC with aromatic and aliphatic segments in BCL(21) proceeds in a random manner. The miscibility of the blend PC/BCL(21) copolyester is favorable for the transesterification of PC with BT segments and CL segments. 展开更多
关键词 TRANSESTERIFICATION poly(bisphenol A carbonate) butylene terephthalate-caprolactone copolyester 1H-NMR
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Thermal Behavior and Crystal Transition of Biodegradable Poly(butylenes adipate)Revealed by Two-Dimensional Correlation Spectroscopy
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作者 CHEN Yu-jing Isao Noda Young Mee Jung 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2016年第S1期139-140,共2页
In the present study,thermal behavior and crystal transition of pure poly(butylene adipate)(PBA)upon heating process were investigated by FTIR spectroscopy.To gain further insight into the thermal behavior alteration ... In the present study,thermal behavior and crystal transition of pure poly(butylene adipate)(PBA)upon heating process were investigated by FTIR spectroscopy.To gain further insight into the thermal behavior alteration and the phase transition of PBA,we performed two-dimensional(2D)correlation analysis.We found thatβ-form PBA crystal undergoes not only the melting process but also crystal transition upon the heating process. 展开更多
关键词 poly(butylene adipate) Thermal behavior Crystal transition Two-dimensional correlation spec-troscopy
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Construction and evaluation of co-electrospun poly (butylene succinate)/gelatin materials as potential vascular grafts
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作者 Tingting Yang Han Xu +5 位作者 Congrui Zhao Di Tang Fan Mu Hongjiang Lu Zhoufeng Rao Shufang Wang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第11期297-305,共9页
In this study,a series of poly(butylene succinate)(PBSU)/gelatin composites were prepared by electrospinning.The morphology,physicochemical analysis,biomechanical properties,biocompatibility,and biodegradability of th... In this study,a series of poly(butylene succinate)(PBSU)/gelatin composites were prepared by electrospinning.The morphology,physicochemical analysis,biomechanical properties,biocompatibility,and biodegradability of the materials were evaluated.The results showed that the ultimate tensile stress of the vascular PBSU/gelatin grafts at(95/5),(90/10),(85/15),and(80/20)was(4.17±0.54)MPa,(3.81±0.44)MPa,2.94±0.69 MPa and 2.11±0.72 MPa respectively,and the burst pressure was(282.7±22.3)kPa,(295.3±3.9)kPa,(306.8±13.9)kPa and(307.6±9.0)kPa respectively,which met the requirements of tissue-engineered blood vessels.Furthermore,the addition of gelatin improved the hydrophilicity and degradation properties of PBSU,thus enhancing cell adhesion and promoting the inward growth of vascular smooth muscle cells.In summary,the research in this paper provides a useful reference for the preparation and optimization of vascular scaffolds. 展开更多
关键词 poly(butylene succinate) GELATIN Co-electrospinning DEGRADATION Vascular graft
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Influencing Factors and Process on <i>in Situ</i>Degradation of Poly(<i>Butylene Succinate</i>) Film by Strain <i>Bionectria ochroleuca</i>BFM-X1 in Soil
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作者 Xueli Mei Chengming Tian +1 位作者 Qian Dong Yingmei Liang 《Journal of Environmental Protection》 2012年第6期523-532,共10页
This is the first report on the PBS film degraded by any Bionectria ochroleuca fungal strain. The fungal strain BFM-X1 was isolated from an air environment on a vegetable field and was capable of degrading poly(butyle... This is the first report on the PBS film degraded by any Bionectria ochroleuca fungal strain. The fungal strain BFM-X1 was isolated from an air environment on a vegetable field and was capable of degrading poly(butylene succinate) (PBS). The taxonomic identity of the strain BFM-X1 was confirmed to be Bionectria ochroleuca (showing a 99% similarity to B. ochroleuca in a BLAST search) through an ITS rRNA analysis. The bio-degradation of the PBS film by strain BFM-X1 was studied. Approximately 97.9% of the PBS film was degraded after strain BFM-X1 was inoculated at 28?C for 14 days. The degradation efficiency of BFM-X1 against PBS film under different soil environmental conditions was characterized. The results indicated that 62.78% of the PBS film loss was recorded in a 30-d experimental run in a sterile soil environment indoors. On adding strain BFM-X1 to a soil sample, the PBS degradation rate accelerated approximately fivefold. Furthermore, both temperature and humidity influenced the in situ degradation of the PBS by strain BFM-X1, and temperature may be the major regulating factor. The degradation was particularly effective in the warm season, with 90% of weight loss occurring in July and August. Scanning electron microscope observations showed surface changes to the film during the degradation process, which suggested that strain BFM-X1preferentially degraded an amorphous part of the film from the surface. These results suggested that the strain B. ochroleuca BFM-X1 was a new resource for degrading PBS film and has high potential in the bioremediation of PBS-plastic-contaminated soil 展开更多
关键词 poly(butylene Succinate) (PBS) In Situ Biodegradation STRAIN B. ochroleuca BFM-X1 Temperature Humidity
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Crystallization and Dynamic Mechanical Behavior of Coir Fiber Reinforced Poly(Butylene Succinate)Biocomposites
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作者 Xu Yan Changheng Liu +4 位作者 Liang Qiao Kaili Zhu Hongsheng Tan Shuhua Dong Zhitao Lin 《Journal of Renewable Materials》 SCIE EI 2022年第4期1039-1048,共10页
The crystallization behavior,crystal morphology and form,and viscoelastic behavior of poly(butylene succinate)(PBS)and coir fiber/PBS composites(CPB)were investigated by differential scanning calorimetry(DSC),polarize... The crystallization behavior,crystal morphology and form,and viscoelastic behavior of poly(butylene succinate)(PBS)and coir fiber/PBS composites(CPB)were investigated by differential scanning calorimetry(DSC),polarized optical microscopy(POM),X-ray diffraction(XRD)and dynamic mechanical analysis(DMA).The results of DSC measurement show that the crystallization temperature increases with the filling of coir fibers.POM images reveal that the spherulitic size and crystallization behavior of PBS are influenced by the coir fibers in the composites.XRD curves show that the crystal form of pure PBS and CPB are remaining almost identical.In addition,the storage modulus of CPB significantly increases comparing with the pure PBS.This predicted the dimensional stability and improved load-deformation temperature.In conclusion,the addition of coir fibers has a significant effect on the thermal properties of the matrix. 展开更多
关键词 poly(butylene succinate) coir fiber CRYSTALLIZATION dynamic mechanical analysis
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THERMAL PROPERTY, MISCIBILITY AND CRYSTALLIZATION BEHAVIOR OF POLY(3-HYDROXYBUTYRATE-co-3-YDROXYHEXANOATE) AND POLY(BUTYLENE SUCCINATE-ADIPATE) (PHBHHX/PBSA) BLENDS
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作者 WANG Shufang GUO Tianying +3 位作者 TAO Jian ZHENG Chenggang ZHANG Banghua SONG Cunjiang 《Chinese Journal of Reactive Polymers》 2005年第1期1-7,共7页
Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/... Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/20 to 20/80 by melt mixing method. Differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), dynamic mechanical thermal analysis (DMA), polarizing optical microscopy (POM) and wide angle X-ray diffractometer (WAXD) were used to study the miscibility and crystallization behavior of PHBHHx/PBSA blends. Experimental results indicate that PHBHHx is immiscible with PBSA as shown by the almost unchanged glass transition temperature and the biphasic melt. 展开更多
关键词 poly(3-hydroxybutyrate-co-hydroxyhexanoate)/poly(butylenes succinate-adipate) blends Thermal property MISCIBILITY Crystallization.
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Biodegradable Poly(butylene adipate-co-terephthalate)/Poly(glycolic acid) Films: Effect of Poly(glycolic acid) Crystal on Mechanical and Barrier Properties 被引量:3
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作者 Hong-Wei Pan Ye Wang +6 位作者 Shi-Ling Jia Yan Zhao Jun-Jia Bian Hui-Li Yang Yan-Ping Hao Li-Jing Han Hui-Liang Zhang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2023年第7期1123-1132,共10页
Binary biodegradable polymers films, poly(butylene adipate-co-terephthalate)(PBAT) and poly(glycolic acid)(PGA), were prepared through batch melt mixing to obtain Film Ⅰ and Film Ⅱ under two different processing con... Binary biodegradable polymers films, poly(butylene adipate-co-terephthalate)(PBAT) and poly(glycolic acid)(PGA), were prepared through batch melt mixing to obtain Film Ⅰ and Film Ⅱ under two different processing conditions. PGA crystals played a major role in enhancing the mechanical and barrier properties of the films. For Film Ⅰ, there were initial PGA crystals before the film blowing process, the PGA molecular chain further crystallized, forming the oriented crystallization of PGA. Moreover, the Xcand crystalline size in Film Ⅰ were higher than those in Film Ⅱ. Compared with the different processing methods, Film Ⅰ has excellent mechanical and oxygen barrier properties due to the crystallization and orientation. The tensile strength reached 45.0 MPa, and tear strength exceeded 138.2 kN/m, while the elongation at break was as high as 750% for PBAT/PGA 85/15 in Film Ⅰ. The WVTR, WVP coefficients, and OP coefficients of PBAT/PGA films were decreased obviously with increasing the PGA content both in Film Ⅰ and Film Ⅱ. Moreover, the barrier properties of oxygen in Film Ⅰ were better than that in Film Ⅱ. This work reveals a feasible processing technique by introducing of initial crystallization of PGA to blow PBAT/PGA films with excellent mechanical and barrier properties. 展开更多
关键词 poly(butylene adipate-co-terephthalate) poly(glycolic acid)(PGA) Biodegradable polymers FILMS
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Recyclable thermally conductive poly(butylene adipate-co-terephthalate)composites prepared via forced infiltration
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作者 Chenglin Li Yi Han +4 位作者 Qingyuan Du Daming Wu Jingyao Sun Zhao Wang Liqun Zhang 《SusMat》 2023年第3期345-361,共17页
With the rapid development of electronic equipment and communication technology,the demand for polymer composites with high thermal conductivity and mechanical properties has increased significantly.However,its nondeg... With the rapid development of electronic equipment and communication technology,the demand for polymer composites with high thermal conductivity and mechanical properties has increased significantly.However,its nondegradable polymer matrix will inevitably bring more and more serious environmental pollution.Therefore,it is urgent to develop biodegradable thermally conductive polymer composites.In this work,biodegradable poly(butylene adipate-coterephthalate)(PBAT)is used as the matrix material,and vacuum-assisted filtration technology is employed to prepare carbon nanotube(CNT)and cellulose nanocrystal(CNC)networks with high thermal conductivity.Then CNT-CNC/PBAT composites with high thermal conductivity and excellent mechanical properties are prepared by the ultrasonic-assisted forced infiltration method.Both experiment and simulation methods are used to systematically investigate the thermally conductive and dissipation performances of the CNT-CNC/PBAT composites.Above all,a simple alcoholysis reaction is applied to realize the separation of the PBAT matrix and functional fillers without destroying the conductive network skeleton,which makes it possible for the recycling of thermally conductive polymer composites. 展开更多
关键词 forced infiltration poly(butylene adipate-co-terephthalate)matrix recyclable thermal interface material
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Biodegradable Foaming Material of Poly(butylene adipate-co-terephthalate)(PBAT)/Poly(propylene carbonate)(PPC) 被引量:12
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作者 Han-Lin Tian Ze-Peng Wang +6 位作者 Shi-Ling Jia Hong-Wei Pan Li-Jing Han Jun-Jia Bian Ying Li Hui-Li Yang Hui-Liang Zhang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第2期208-219,共12页
A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate)(PBAT)/poly(propylene carbonate)(PPC)was successfully prepared by chemical foaming agent and screw extrusion method.First,PBAT was modif... A biodegradable blend foaming material of poly(butylene adipate-co-terephthalate)(PBAT)/poly(propylene carbonate)(PPC)was successfully prepared by chemical foaming agent and screw extrusion method.First,PBAT was modified by bis(tert-butyl dioxy isopropyl)benzene(BIBP)for chain extension,and then the extended PBAT(E-PBAT)was foamed with PPC using a twin(single)screw extruder.By analyzing the properties of the blends,we found that Young’s modulus increased from 58.8 MPa of E-PBAT to 244.7 MPa of E-PBAT/PPC 50/50.The viscosity of the polymer has a critical influence on the formation of cells.Compared with neat PBAT(N-PBAT),the viscosity of E-PBAT increased by 3396 Pa·s and E-PBAT/PPC 50/50 increased by 8836 Pa·s.Meanwhile,the dynamic mechanical analysis(DMA)results showed that the storage modulus(E’)at room temperature increased from 538 MPa to 1650 MPa.The various phase morphologies(“sea-island”,“quasi-co-continuous”and“cocontinuous”)and crystallinity of the blends affected the spread velocity of gas and further affected the foaming morphology in E-PBAT/PPC foam.Therefore,through the analysis of phase morphology and foaming mechanism,we concluded that the E-PBAT/PPC 70/30 component has both excellent strength and the best foaming performance. 展开更多
关键词 poly(butylene adipate-co-terephthalate) poly(propylene carbonate) Phase structure Biodegradable foam Extrusion foaming
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淀粉的改性及其对淀粉/PBAT/碳酸钙复合材料结构和性能的影响
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作者 赵小红 卢杏 《中国塑料》 CAS CSCD 北大核心 2024年第4期40-46,共7页
采用甘油、六偏磷酸钠(SHMP)和聚乙二醇(PEG)改性木薯淀粉并制备改性淀粉/聚己二酸对苯二甲酸丁二醇酯(PBAT)/碳酸钙复合材料,采用傅里叶变换红外光谱仪(FTIR)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、差示扫描量热仪(DSC)、热失重分... 采用甘油、六偏磷酸钠(SHMP)和聚乙二醇(PEG)改性木薯淀粉并制备改性淀粉/聚己二酸对苯二甲酸丁二醇酯(PBAT)/碳酸钙复合材料,采用傅里叶变换红外光谱仪(FTIR)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、差示扫描量热仪(DSC)、热失重分析仪(TG)等对改性淀粉和复合材料进行分析,研究改性淀粉对复合材料结构和性能的影响。结果表明,甘油的外增塑作用和PEG、SHMP的内增塑作用使淀粉化学结构改变、无定形成分增加,淀粉颗粒由饱满的圆球状变成了不规则的大颗粒,250℃前稳定性提高,250℃后稳定性降低,有利于使用加工和热分解,不同改性剂改性淀粉结晶熔融行为存在差异;复合不会改变PBAT、碳酸钙和淀粉的原有晶型,但相容性的差异导致复合材料热性能和力学性能的差异,改性淀粉增加了复合材料的韧性,甘油、SHMP和PEG的协同改性使淀粉与PBAT、碳酸钙的相容性最佳,复合材料的综合性能最好。 展开更多
关键词 木薯淀粉 聚己二酸对苯二甲酸丁二醇酯 碳酸钙 复合材料
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Degradation of poly(butylene adipate-co-terephthalate) by Stenotrophomonas sp. YCJ1 isolated from farmland soil 被引量:4
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作者 Hao Jia Min Zhang +3 位作者 Yunxuan Weng Yao Zhao Chengtao Li Aqsa Kanwal 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2021年第5期50-58,共9页
In recent years, poly(butylene adipate-co-terephthalate)(PBAT) has been widely used. However, PBAT-degrading bacteria have rarely been reported. PBAT-degrading bacteria were isolated from farmland soil and identified.... In recent years, poly(butylene adipate-co-terephthalate)(PBAT) has been widely used. However, PBAT-degrading bacteria have rarely been reported. PBAT-degrading bacteria were isolated from farmland soil and identified. The effects of growth factors on the degradation of PBAT and the lipase activity of PBAT-degrading bacteria were assessed. The degradation mechanism was analyzed using scanning electron microscopy, attenuated total reflection Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, Xray diffraction, and liquid chromatography-mass spectrometry. The results showed that Stenotrophomonas sp. YCJ1 had a significant degrading effect on PBAT. Under certain conditions, the strain could secrete 10.53 U/m L of lipase activity and degrade 10.14 wt.% of PBAT films. The strain secreted lipase to catalyze the degradation of the ester bonds in PBAT, resulting in the production of degradation products such as terephthalic acid, 1,4-butanediol, and adipic acid. Furthermore, the degradation products could participate in the metabolism of YCJ1 as carbon sources to facilitate complete degradation of PBAT, indicating that the strain has potential value for the bioremediation of PBAT in the environment. 展开更多
关键词 Biodegradable poly(butylene adipate-co-terephthalate)(PBAT) Stenotrophomonas sp. Lipase Degradation mechanism
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Addition of Thermoplastic Starch(TPS)to Binary Blends of Poly(lactic acid)(PLA)with Poly(butylene adipate-co-terephthalate)(PBAT):Extrusion Compounding,Cast Extrusion and Thermoforming of Home Compostable Materials 被引量:1
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作者 Clizia Aversa Massimiliano Barletta 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2022年第10期1269-1286,I0011,共19页
Development of home compostable materials based on bioavailable polymers is of high strategic interest as they ensure a significant reduction of the environmental footprint in many production sectors.In this work,the ... Development of home compostable materials based on bioavailable polymers is of high strategic interest as they ensure a significant reduction of the environmental footprint in many production sectors.In this work,the addition of thermoplastic starch to binary PLA/PBAT blends was studied.The compounds were obtained by a reactive extrusion process by means of a co-rotating twin screw extruder.Thermomechanical,physical and chemical characterization tests were carried out to highlight the effectiveness of the material design strategy.The compounds were subsequently reprocessed by cast extrusion and thermoforming in order to obtain products suitable for the storage of hot food.The extruded films and the thermoformed containers were further characterized to highlight their thermo-mechanical,physical and chemical properties.Thermo-rheological,mechanical and physical properties of the material and of the cast film were analyzed thoroughly using combined technique as capillary rheometer,MFI,DSC,VICAT/HDT,XRD,FTIR,UV-Vis,SEM,permeability and,lastly,running preliminary chemical inertness and biodegradation tests.Particular attention was also devoted to the evaluation of the thermo-mechanical resistance of the thermoformed containers,where the PLA/PBAT/TPS blends proved to be very effective,also presenting a high disintegration rate in ambient conditions. 展开更多
关键词 Thermoplastic starch(TPS) poly(lactic acid)(PLA) poly(butylene adipate-co-terephthalate)(PBAT) EXTRUSION Thermoforming Compostability
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木质素在合成可降解高分子材料中的应用研究进展
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作者 刘金凤 杨勇 +4 位作者 李永泉 胡嘉伟 徐长安 胡孝义 丁树岩 《工程塑料应用》 CAS CSCD 北大核心 2024年第2期175-180,共6页
简述了木质素的结构、特性和分类情况,并综述了近年来国内外使用木质素来增强和改善聚对苯二甲酸-己二酸丁二酯、聚乳酸、聚己内酯和聚丁二酸丁二酯等合成可降解高分子材料性能的研究进展。指出木质素与合成可降解高分子材料复合可以赋... 简述了木质素的结构、特性和分类情况,并综述了近年来国内外使用木质素来增强和改善聚对苯二甲酸-己二酸丁二酯、聚乳酸、聚己内酯和聚丁二酸丁二酯等合成可降解高分子材料性能的研究进展。指出木质素与合成可降解高分子材料复合可以赋予复合材料多种功能特性,如紫外屏蔽、抗菌、阻隔等,并能改善材料的生物降解性能,同时实现降本增效的目标。最后提出当前木质素与合成可降解高分子材料复合材料工业化生产应用存在的问题,并对木质素基全生物降解复合材料的未来研究趋势进行展望。 展开更多
关键词 木质素 聚对苯二甲酸-己二酸丁二酯 聚乳酸 聚己内酯 聚丁二酸丁二酯 复合材料 可降解材料
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