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EPITAXIAL CRYSTALLIZATION OF POLY(ε-CAPROLACTONE)ON HIGHLY ORIENTED ISOTACTIC POLYPROPYLENE 被引量:1
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作者 Xiao Hui TAO Shou Ke YAN De Cai YANG Polymer-Physics Laboratory,Changchun Institute of Applied Chemistry Academia Sinica,Changchun 130022 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第12期1093-1096,共4页
Electron microscope and electron diffraction have been used to study epitaxial crystallization of poly(ε-caprolactone)(PCL).on highly oriented film of isotactic polypropylene(iPP).The results obtained from bright fie... Electron microscope and electron diffraction have been used to study epitaxial crystallization of poly(ε-caprolactone)(PCL).on highly oriented film of isotactic polypropylene(iPP).The results obtained from bright field(BF)electron micrograph and electron diffraction indicate that the PCL can epitaxially grow on iPP substrate and form cross-hatched lamellar texture.The c axes of PCL are ±500 apart from the c axes of iPP. The contact planes of the two kinds of crystals are(010)of iPP and(100) of PCL,respectively. 展开更多
关键词 PCL PP caprolactone)ON HIGHLY ORIENTED ISOTACTIC polyPROPYLENE EPITAXIAL CRYSTALLIZATION OF poly
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Synthesis and Characterization of Degraded Gelatin Grafted Poly(ε-caprolactone) Copolymers 被引量:2
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作者 冯亚凯 房子琛 +1 位作者 王贺云 郭锦棠 《Transactions of Tianjin University》 EI CAS 2013年第3期182-187,共6页
Hydrophilic degraded gelatin was modified with hydrophobic poly(ε-caprolactone) (PCL) via a chemical grafting route.Firstly,PCL with one hydroxyl end group was prepared by the ring-opening polymerization of εcaprola... Hydrophilic degraded gelatin was modified with hydrophobic poly(ε-caprolactone) (PCL) via a chemical grafting route.Firstly,PCL with one hydroxyl end group was prepared by the ring-opening polymerization of εcaprolactone (ε-CL) with tin (Ⅱ) 2-ethylhexanoate as catalyst and n-butyl alcohol as initiator.Secondly,the PCL reacted with isophorone diisocyanate (IPDI) to prepare PCL with isocyanate functional group (PCL-NCO).Hydroxylamine was used to degrade gelatin by the cleavage between asparagine and glycine residues of gelatin.PCL-NCO reacted with the hydroxyl/amino groups of degraded gelatin in a homogeneous system and yielded the PCL modified gelatin copolymers.The gelatin grafted PCL copolymers were measured by means of XRD,FTIR,DSC and 1 H NMR.The results confirmed the conjugation of PCL onto gelatin chains.The PCL modified gelatin can be used as biomaterials owing to their biocompatibility and biodegradation. 展开更多
关键词 Amino acids BIOCOMPATIBILITY BIODEGRADATION BIOMATERIALS COpolyMERS Functional groups
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PREPARATION AND CHARACTERIZATION OF INCLUSION COMPLEXES OF TWO-ARM LINEAR AND FOUR-ARM STAR-SHAPED POLY(ε-CAPROLACTONE)S WITHα-CYCLODEXTRIN 被引量:1
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作者 Lu Wang Jing-liang Wang 董常明 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2006年第3期245-252,共8页
Both four-ann star-shaped poly(ε-caprolactone) (4sPCL) and two-ann linear PCL (2LPCL) were synthesized and their inclusion complexation with α-cyclodextrin (α-CD) were studied. The inclusion complexes (ICs... Both four-ann star-shaped poly(ε-caprolactone) (4sPCL) and two-ann linear PCL (2LPCL) were synthesized and their inclusion complexation with α-cyclodextrin (α-CD) were studied. The inclusion complexes (ICs) formed between the PCL polymers and α-CD were characterized by ^1H-NMR, DSC, TGA, WAXD, and FT-1R, respectively. Both branch ann number and molecular weight of the PCL polymers have apparent effect on the stoichiometry (CL:CD, mol:mol) of these ICs. All these analytical results indicate that the branch arms of the PCL polymers are incorporated into the hydrophobic α-CD cavities and their original crystalline properties are completely suppressed. Moreover, the inclusion complexation between two-ann linear or four-ann star-shaped PCL polymers and α-CD not only enhances the thermal stability of the guest PCL polymers but also improves that of α-CD. 展开更多
关键词 Inclusion complexes Linear poly(ε-caprolactone Star-shaped poly(ε-caprolactone Thermal stability.
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Structure Changes of Silk Fibroin(SF) by Blending with Poly(ε-caprolactone)(PCL):Characterization of SF and PCL Blended Electrospinning Films 被引量:2
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作者 赵荟菁 李鹏举 +2 位作者 尤人传 刘桂阳 李明忠 《Journal of Donghua University(English Edition)》 EI CAS 2014年第3期368-374,共7页
The mechanical properties and water solubility of electrospinning SF films limit their use as biomaterials. In order to develop a tissue engineering biomaterial with both satisfying biological properties and sufficien... The mechanical properties and water solubility of electrospinning SF films limit their use as biomaterials. In order to develop a tissue engineering biomaterial with both satisfying biological properties and sufficient biomechanical properties,blended films composed of silk fibroin( SF) and poly( ε-caprolactone)( PCL) were fabricated by electrospinning in this study. Scanning electron microscope( SEM), X-ray diffraction( XRD),thermal analysis,Fourier transform-infrared( FT-IR),Raman spectra,mechanical testing,and water solubility were used to characterize the morphological, structural and mechanical properties of the blended electrospinning films. Results showed that the diameter of the blended fiber was distributed between 600 and1000 nm,and the fiber diameter increased as the PCL content increased. There is no obvious phase separation due to the similarity and intermiscibility,as well as the interactions( mainly hydrogen bonds), between the two polymers. Meanwhile, the secondary structures of SF changed from random coils and Silk I to Silk II because of the interactions between SF and PCL. For this reason,the tensile strength and elongation at break of the electrospinning films improved significantly,and the water solubility decreased. In conclusion,the blended electrospinning films fabricated in this study showed satisfying mechanical properties and water insolubilities,and they may be promising biomaterials for applications in tissue engineering for blood vessels,nerve conduits,tendons,ligaments and other tissues. 展开更多
关键词 silk fibroin(SF) poly-caprolactone)(PCL) BLENDING ELECTROSPINNING secondary structure
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MOLECULAR WEIGHT DEPENDENCE OF THE MELTING BEHAVIOR OF POLY(ε-CAPROLACTONE) 被引量:1
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作者 马德柱 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2002年第1期45-51,共7页
Poly(ε-caprolactone) (PCL) with different molecular weights was synthesized and characterized by a gelpermeation chromatograph equipped with multiple detector. The melting behavior of PCL was also studied. It was fou... Poly(ε-caprolactone) (PCL) with different molecular weights was synthesized and characterized by a gelpermeation chromatograph equipped with multiple detector. The melting behavior of PCL was also studied. It was found thatthe equilibrium melting points (T_m^0) of PCL samples depend on their molecular weights. Wide angle X-ray diffractionmeasurements (WAXD) and DSC measurements showed that the crystals of the high molecular weight PCLs were moreperfect than those of the low molecular weigh ones. These results demonstrate that the concentration of the end groups ofPCL chains is the main factor that influences the melting behavior. The fusion enthalpy per repeating unit (ΔH_u) wasdetermined to be 11.3 kJ/mol for PCL. 展开更多
关键词 poly-caprolactone) Equilibrium melting point Fusion enthalpy
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HETEROCYCLIC SCHIFF BASE NEODYMIUM COMPLEX AS CATALYST FOR RING-OPENING POLYMERIZATION OF ε-CAPROLACTONE 被引量:1
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作者 孙维林 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第4期475-479,共5页
An aromatic heterocyclic Schiff base neodymium complex bearing thiazole was synthesized and its activity in the ring-opening polymerization ofε-caprolactone(CL)was examined.The conditions of the CL/Nd molar ratio,mon... An aromatic heterocyclic Schiff base neodymium complex bearing thiazole was synthesized and its activity in the ring-opening polymerization ofε-caprolactone(CL)was examined.The conditions of the CL/Nd molar ratio,monomer concentration,polymerization time and temperature were investigated.Activities of ca.171 kg/Nd·h were obtained under the optimum condition(CL/Nd=1600(molar ratio),[CL]=2.26 mol L^(-1),1 h at 50℃),giving a poly(ε-caprolactone)(PCL)of number-average molecular weight M_n=5.4×10~4 and molecular... 展开更多
关键词 Aromatic heterocyclic Schiff Base Rare earth complex poly(ε-caprolactone
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Novel electrospun poly(ε-caprolactone)/type Ⅰ collagen nanofiber conduits for repair of peripheral nerve injury 被引量:1
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作者 Chun-Ming Yen Chiung-Chyi Shen +5 位作者 Yi-Chin Yang Bai-Shuan Liu Hsu-Tung Lee Meei-Ling Sheu Meng-Hsiun Tsai Wen-Yu Cheng 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第9期1617-1625,共9页
Recent studies have shown the potential of artificially synthesized conduits in the repair of peripheral nerve injury. Natural biopolymers have received much attention because of their biocompatibility. To investigate... Recent studies have shown the potential of artificially synthesized conduits in the repair of peripheral nerve injury. Natural biopolymers have received much attention because of their biocompatibility. To investigate the effects of novel electrospun absorbable poly(ε-caprolactone)/type Ⅰ collagen nanofiber conduits(biopolymer nanofiber conduits) on the repair of peripheral nerve injury, we bridged 10-mm-long sciatic nerve defects with electrospun absorbable biopolymer nanofiber conduits, poly(ε-caprolactone) or silicone conduits in Sprague-Dawley rats. Rat neurologica1 function was weekly evaluated using sciatic function index within8 weeks after repair. Eight weeks after repair, sciatic nerve myelin sheaths and axon morphology were observed by osmium tetroxide staining, hematoxylin-eosin staining, and transmission electron microscopy.S-100(Schwann cell marker) and CD4(inflammatory marker) immunoreactivities in sciatic nerve were detected by immunohistochemistry. In rats subjected to repair with electrospun absorbable biopolymer nanofiber conduits, no serious inflammatory reactions were observed in rat hind limbs, the morphology of myelin sheaths in the injured sciatic nerve was close to normal. CD4 immunoreactivity was obviously weaker in rats subjected to repair with electrospun absorbable biopolymer nanofiber conduits than in those subjected to repair with poly(ε-caprolactone) or silicone. Rats subjected to repair with electrospun absorbable biopolymer nanofiber conduits tended to have greater sciatic nerve function recovery than those receiving poly(ε-caprolactone) or silicone repair. These results suggest that electrospun absorbable poly(ε-caprolactone)/type Ⅰ collagen nanofiber conduits have the potential of repairing sciatic nerve defects and exhibit good biocompatibility. All experimental procedures were approved by Institutional Animal Care and Use Committee of Taichung Veteran General Hospital, Taiwan, China(La-1031218) on October 2, 2014. 展开更多
关键词 poly-caprolactone) type collagen ELECTROSPINNING sciatic nerve nerve conduit immunohistostaining walking track analysis peripheral nerve injury
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Preparation of High Molecular Weight Poly(L-lactide-co-caprolactone)(85-15)
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作者 湛雪辉 申雄军 +2 位作者 LI Zhaohui LI Xia CAO Fen 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2013年第1期139-143,共5页
Poly(L-lactide-co-caprolactone)(85-15)[P(LLA-CL)(85-15)] was synthesized from high purity L-lactide and e-caprolactone using tin octoate as initiator by ring-opening polymerization, and characterized by infrar... Poly(L-lactide-co-caprolactone)(85-15)[P(LLA-CL)(85-15)] was synthesized from high purity L-lactide and e-caprolactone using tin octoate as initiator by ring-opening polymerization, and characterized by infrared spectrum and IH-NMR spectrum. The synthesized P(LLA-CL)(85-15) is a random copolymer. The influences of polymerization temperature, polymerization time, dosage of initiator and polymerization pressure on the weight average molecular weight and the polydispersity index of P(LLA-CL)(85-15) were investigated. The optimum preparation conditions of P(LLA-CL)(85-15) are: the polymerization pressure is less than 0.5 Pa, the polymerization temperature is 130 ~C, the n(M)/n(I) ratio is 8 000/1, and the polymerization time is 36 h. Under the condition, the weight-average molecular weight of prepared P(LLA-CL)(85-15) is 65.6x 104, and molecular weight distribution coefficient is 1.15. 展开更多
关键词 poly(L-lactide-co-caprolactone)(85-15) COpolyMERIZATION high molecular weight characterization
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Electrospun Small Diameter Tubes to Mimic Mechanical Properties of Native Blood Vessels Using Poly (L-lactide-co-ε-caprolactone )and Silk Fibroin: a Preliminary Study
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作者 赵荟菁 吴倩瑶 +1 位作者 王璐 林婧 《Journal of Donghua University(English Edition)》 EI CAS 2013年第5期349-351,共3页
Mismatch in mechanical properties can induce intimal hyperplasia,which is one of the main reasons for the failure of small diameter artificial blood vessels. Electrospun small diameter tubes with tailored mechanical p... Mismatch in mechanical properties can induce intimal hyperplasia,which is one of the main reasons for the failure of small diameter artificial blood vessels. Electrospun small diameter tubes with tailored mechanical properties were fabricated through blending poly( L-lactide-co-ε-caprolactone)( PLCL) and silk fibroin( SF)with the mass ratios of 30 /70,50 /50,and 70 /30 in this study.Scanning electron microscopy( SEM) and mechanical testing were used to characterize morphological and mechanical properties of the tubes. Results showed that tensile strength of the tubes was higher than most of the native blood vessels,and elongations at break of them were improved greatly by blending PLCL. Compliances of the tubes were all higher than 1% /13. 33 kPa( 1% /100 mmHg).Particularly,tubes with blending mass ratio of 50 /50 showed similar compliance with human native femoral arteries,which provided a promising biomaterial that could be applied on small diameter vascular applications. 展开更多
关键词 small diameter silk fibroin poly(L-lactide-co-εcaprolactone) MECHANICAL properties
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TRANSESTERIFICATION OF POLY(ETHYLENE TEREPHTHALATE) WITH POLY(ε-CAPROLACTONE)
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作者 Zheng-ping Zhang Xiao-lie Luo +1 位作者 Yu-chen Lu De-zhu Ma Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2000年第5期405-412,共8页
Transesterification of poly(ethylene terephthalate) (PET) with poly(ε-caprolactone) (PCL) was investigated bymeans of NMR spectroscopy, extraction experiments, differential scanning calorimetry (DSC) and ph... Transesterification of poly(ethylene terephthalate) (PET) with poly(ε-caprolactone) (PCL) was investigated bymeans of NMR spectroscopy, extraction experiments, differential scanning calorimetry (DSC) and phase contrast microscopy(PCM). The;H-NMR results show that transesterification takes place in the melt blends and leads to the formation of thePET-PCL copolyester with a chemical structure similar to ethylene terephthalate-ε-caprolactonc copolycster (TCL)synthesized directly from monomers. However, even in the blend that has been transesterified for 8 h, the random PET-PCLcopolyester, PET-PCL copolyester with long PET or long PCL segments and the unreacted PET and PCL homopolymersmay coexist. Due to the low mobility of PET and PCL chains and the high viscosity of the two macromolecules, thetransesterification proceeds with difficulty. Furthermore, PET is incompatible with PCL, the transesterification can onlyoccur at the interface or in the interfacial region between two phases, and finally the reaction can only reach a localequilibrium. These results indicate that in fact the transesterification in the melt blend between two incompatiblehomopolymers could not lead to the formation of completely random or typical block copolyesters. 展开更多
关键词 TRANSESTERIFICATION poly(ethylene terephthalate) poly-caprolactone) CRYSTALLIZATION Phase structure
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AN APPROACH TO SYNTHESIZE POLY(ETHYLENE GLYCOL)-b-POLY(ε-CAPROLACTONE) WITH TERMINAL AMINO GROUP via SCHIFF'S BASE AS AN INITIATOR
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作者 陈学思 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第4期455-463,共9页
A new method to synthesize a degradable terminal amino group-containing copolymer,poly(ethylene glycol)-b- poly(ε-caprolactone)(MPEG-PCL-NH_2),was developed in the following three steps:(1)the ring-opening polymeriza... A new method to synthesize a degradable terminal amino group-containing copolymer,poly(ethylene glycol)-b- poly(ε-caprolactone)(MPEG-PCL-NH_2),was developed in the following three steps:(1)the ring-opening polymerization (ROP)ofε-caprolactone from the Schiff base prepared from benzatdehyde and ethanolamine(Ph-CH=NCH_2CH_2OH)used as an initiator to obtain heterobifunctional poly(ε-caprolactone)with one terminal Schiff base group and one hydroxyl group (HO-PCL-CH_2CH_2N=CH-Ph);(2)the coupling reaction of two ... 展开更多
关键词 Schiff base poly(ε-caprolactone poly(ethylene glycol) Biodegradability MICELLE
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Poly (L-lactide-co-e-caprolactone)/Functionalized CNTs Nanocomposite,Thermal and Mechanical Properties
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作者 A Nabipour Chakoli 蔡伟 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2009年第S1期32-36,共5页
Multiwalled carbon nanotubes(MWCNTs) grafted with poly(L-lactide-e-caprolactone)(PCLA) were synthesized by ring opening polymerization reaction and used as a reinforcement for neat PCLA.Scanning electron microscopy(SE... Multiwalled carbon nanotubes(MWCNTs) grafted with poly(L-lactide-e-caprolactone)(PCLA) were synthesized by ring opening polymerization reaction and used as a reinforcement for neat PCLA.Scanning electron microscopy(SEM) revealed that the applied tensile load on the composite was transferred to the MWNT-OH-g-PCLA,loading to a strain failure of the MWCNTs rather than an adhesive failure between the MWCNTs and the matrix. 展开更多
关键词 NANOCOMPOSITE carbon nanotubes poly(L-lactide) poly(e-caprolactone)
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Study on two kinds of degradation mechanisms for biomaterials poly(ε-caprolactone)
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作者 陈建海 陈一民 陈志良 《Journal of Medical Colleges of PLA(China)》 CAS 1999年第3期176-179,192,共5页
The in vitro and in vivo degradation behaviour of poly (ε-caprolactone) (PCL) has been examined in terms of degree of degradation and morphological change during an inclibation period of up to 300 d. Gel permeation c... The in vitro and in vivo degradation behaviour of poly (ε-caprolactone) (PCL) has been examined in terms of degree of degradation and morphological change during an inclibation period of up to 300 d. Gel permeation chromatography (GPC) and differential scanning calorimetry (DSC) were employed to character ize their degradation profiles. The observation of the changes in intrinsic viscosity and average molecular weight as well as the crystallinity of PCL leads to the findings that 2 degradation mechanisms of PCL exist. The subcutaneous implant test shows that the rate of degradation in the rabbit body is much higher than in vitro. This illustrated that in vivo, the mechanism of bioerosion is more important than hydrolytic cleavage of ester linkage, especially in the second stage of degradation. Regardless of the initial Mn of specimens, a lin ear relationship between Mn and degradation time has been observed until the Mn decreased to be about 5 ooo D. Above this figure, the main degradation mechanism was hydrolytic cleavage of ester group accompa nied by enzymatic surface erosion, below this point, the bioerosion with weight loss plays a more significant role than hydrolytic reaction in their degradation. Comparison between the morphology of PCL materials af ter and before erosion was made by means of scanning electron microscopy (SEM). 展开更多
关键词 BIODEGRADATION poly -caprolactone) BIOMATERIALS
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Synthesis and Characterization of ABBA Block Copolymer of Glycolide and ε-Caprolactone
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作者 CHENLi CHENXue-si +1 位作者 DENGMing-xiao JINGXia-bin 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2005年第3期340-344,共5页
A biodegradable ABBA block copolymer was synthesized via the ring-opening co-polymerization of ~ε-caprolactone(CL, B) and glycolide(A) by means of step polymerization in the presence of ethylene glycol as an initiato... A biodegradable ABBA block copolymer was synthesized via the ring-opening co-polymerization of ~ε-caprolactone(CL, B) and glycolide(A) by means of step polymerization in the presence of ethylene glycol as an initiator and stannous octanoate as a catalyst at 110 ℃ for 48 h. The molecular length of the PCL pre-polymer(BB) could be adjusted by controlling the molar ratio of the ethylene glycol initiator to ε-caprolactone monomer. The structure and the composition of the block copolymer were determined by the weight ratio of the monomer glycolide(A) to PCL pre-polymer(BB). The block copolymers were characterized by ~ 1H NMR, GPC, DSC and X-ray. The results confirm the successful synthesis of an ABBA block copolymer. 展开更多
关键词 Biomaterial polyGLYCOLIDE poly-caprolactone) Ring-opening polymerization Block copolymer
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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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Microwave-assisted Polymerization of ε-Caprolactone with Maleic Acid as Initiator and Drug Release Behavior of Ibuprofen-Poly(ε-caprolactone) System
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作者 Ying SONG +3 位作者 Li Jian LIU 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第1期32-34,共3页
Poly(e-caprolactone) (PCL) with weight-average molar mass over 10000 g/mol was synthesized by microwave-assisted ring-opening polymerization of e-caprolactone (e-CL) with maleic acid (MA) as initiator (2.45 GHz, 360 W... Poly(e-caprolactone) (PCL) with weight-average molar mass over 10000 g/mol was synthesized by microwave-assisted ring-opening polymerization of e-caprolactone (e-CL) with maleic acid (MA) as initiator (2.45 GHz, 360 W, 85 min). Ibuprofen-PCL controlled release system was prepared directly by the ROP of e-CL in its mixture with ibuprofen. The release of ibuprofen from the system was sustained and steady. 展开更多
关键词 Microwave ring-opening polymerization poly (e-caprolactone) maleic acid IBUPROFEN drug release.
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Synthesis of Highly Branched Poly(ε-caprolactone) by Self-condensing Atom Transfer Radical Polymerization of Macroinimers
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作者 Rui Xue LIU Yan SHI Zhi Feng FU Shu Ke JIAO 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第3期373-376,共4页
Branched poly(ε-capmlactone) was synthesized by self-condensing atom transfer radical polymerization of macroinimer, α-acryloyoxy-ω-2-bromopropionyloxy poly(ε-caprolactone), which was prepared by enzyme-cataly... Branched poly(ε-capmlactone) was synthesized by self-condensing atom transfer radical polymerization of macroinimer, α-acryloyoxy-ω-2-bromopropionyloxy poly(ε-caprolactone), which was prepared by enzyme-catalyzed ring-opening polymerization of ε-caprolactone with 2-hydroxylethyl acrylate as initiator and esterification of the ω-hydroxyl group of the obtained poly(ε-caprolactone) by 2-bromopropionyl bromide. 展开更多
关键词 Self-condensing vinyl polymerization atom transfer radical polymerization branched polymers poly(ε-caprolactone).
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Melt-Spinning of Nano-Hydroxyapatite/Poly(ε-caprolactone)Composite Fibers for Potential Application in Bone Tissue Engineering
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作者 陈培峰 王富军 +2 位作者 王璐 丁雯 赵健安 《Journal of Donghua University(English Edition)》 EI CAS 2017年第6期726-729,共4页
Nano-hydroxyapatite/poly(e-caprolactone) (nHA/PCL) composite materials are among the best candidates for application in bone tissue engineering. As the main technique to fabricate porous scaffolds, electrospilming... Nano-hydroxyapatite/poly(e-caprolactone) (nHA/PCL) composite materials are among the best candidates for application in bone tissue engineering. As the main technique to fabricate porous scaffolds, electrospilming produce scaffolds with unsatisfactory mechanical strength and limited pore size for cdi infiltration. Micron-sized fiber assembly with higher mechanical strength is qualified to structure hybrid scaffolds. In this study, nHA/PCL monofilament fibers with different mass ratios were fabricated through melt-spinning. Transmission electron microscope (TEM) was used to observe the aggregation between nHA parfides. Other characterizations including scanning electron microscopy (SEM), attenuated total reflection Fourier transform infrared spectroscopy (ATR.FTIR) and X-ray diffraction (XRD) were done to discuss the morphology, components and crystallization of the nHA/PCL composite fibers, respectively. The influence of nHA/PCL mass ratio on the tensile properties and water contact angle of composite fibers was also studied. The SEM images show the homogeneous dispersion of nano partides in the polymer matrix. Besides, nHA content increases the tensile strength, initial modulus and hydrophillcity of the composite fibers under the premise of spinnability. This kind of fibers is strong enough to fabricate fiber assembly which may have potential application in bone tissue engineering. 展开更多
关键词 nano-hydroxyapatite nHA poly 6-caprolactone PCL melt sDinninf tensile vroverties
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Shape Memory Properties of Poly(L-Lactide) / Poly(ε-Caprolactone) Blends and Their Composites with Carbon Nanotubes
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作者 Maryam Amirian Wei Cai Ali Nabipour Chakoli Jiehe Sui Jiangtao Feng 《材料科学与工程(中英文版)》 2010年第3期27-34,共8页
关键词 碳纳米管复合材料 多壁碳纳米管 形状记忆特性 Ε-己内酯 共混物 聚乳酸 内存性能 差示扫描量热法
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High Strength Composite Scaffolds of β-Tricalcium Phosphate and Poly (ε-Caprolactone)
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作者 Kaewsichan Lupong Kaewsrichan Jasadee 《材料科学与工程(中英文版)》 2010年第10期40-44,共5页
关键词 高分子复合材料 磷酸三钙 己内酯 支架 高强度 生物聚合物 杨氏模量 生物陶瓷
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