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The production of biobased diamines from renewable carbon sources: Current advances and perspectives 被引量:8
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作者 Xin Wang Siyuan Gao +4 位作者 Jing Wang Sheng Xu Hui Li Kequan Chen Pingkai Ouyang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第2期4-13,共10页
Bio-based diamines are considered to be a promising alternative to traditional fossil-fuel-based diamines,the important platform chemical for the synthesis of polymer materials.In this review,the current status of the... Bio-based diamines are considered to be a promising alternative to traditional fossil-fuel-based diamines,the important platform chemical for the synthesis of polymer materials.In this review,the current status of the art of the synthesis of aliphatic and aromatic diamines from renewable biomass are considered.In the case of aliphatic diamines,we describe strategies for biologically producing diamines with different carbon numbers including 1,3-diaminopropane,1,4-butanediamine,1,5-pentanediamine,1,6-diaminohexane,1,8-diaminooctane,1,10-diaminodecane,and 1,12-diaminododecane.In addition,aromatic diamines produced from various kinds of renewable biomass,including lignin,cashew nut shell,and terpenoids,are reviewed here.Furthermore,the application of typical diamines in synthesis of polyurethane and polyamide are also reviewed. 展开更多
关键词 Aliphatic diamines Aromatic diamines POLYAMIDE POLYURETHANE
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SYNTHESIS OF N,N'-DISUBSTITUTED MONOTHIOXAMIDE AND STUDY OF THEIR REACTIONS WITH DIAMINES
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作者 Yu Ren YUAN Da Qing SUN Ke Qian CHEN Zhong E LU Department of Chemistry, Suzhou University, Suzhou, 215006 Hal Kang YANG The Central Laboratory, Suzhou University, Suzhou, 215006 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第5期379-380,共2页
In this paper, six N,N'-disubstituted aonothioxamides were synthesized and the reactions between these monothioxamines and diamines (1,2-diamino ethane and 1,3-diamino propane) were studied. Some new compounds wer... In this paper, six N,N'-disubstituted aonothioxamides were synthesized and the reactions between these monothioxamines and diamines (1,2-diamino ethane and 1,3-diamino propane) were studied. Some new compounds were synthesized by using these reactions. 展开更多
关键词 OU DISUBSTITUTED MONOTHIOXAMIDE AND STUDY OF THEIR REACTIONS WITH diamines SYNTHESIS OF N N LR UC Za
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Green and selective hydrogenation of aromatic diamines over the nanosheet Ru/g-C_(3)N_(4)-H_(2) catalyst prepared by ultrasonic assisted impregnation-deposition method 被引量:3
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作者 Huanhuan Yang Liguo Wang +5 位作者 Shuang Xu Yan Cao Peng He Jiaqiang Chen Zheng Zheng Huiquan Li 《Green Energy & Environment》 SCIE EI CSCD 2022年第6期1361-1376,共16页
In this study,nanosheet g-C_(3)N_(4)-H_(2) was prepared by thermal exfoliation of bulk g-C_(3)N_(4) under hydrogen.A series of Ru/g-C_(3)N_(4)-H_(2) catalysts with Ru species supported on the nanosheet g-C_(3)N_(4)-H_... In this study,nanosheet g-C_(3)N_(4)-H_(2) was prepared by thermal exfoliation of bulk g-C_(3)N_(4) under hydrogen.A series of Ru/g-C_(3)N_(4)-H_(2) catalysts with Ru species supported on the nanosheet g-C_(3)N_(4)-H_(2) were synthesized via ultrasonic assisted impregnation-deposition method.Ultrafine Ru nanoparticles(<2 nm)were highly dispersed on nanosheet g-C_(3)N_(4)-H_(2).Strong interaction due to Ru-Nx coordination facilitated the uniform distribution of Ru species.Meanwhile,the involvement of surface basicity derived from abundant nitrogen sites was favourable for enhancing the selective hydrogenation performance of bi-benzene ring,i.e.,almost complete 4,40-diaminodiphenylmethane(MDA)conversion and>99%4,40-diaminodicyclohexylmethane selectivity,corresponding to a reaction activity of 35.7 mol_(MDA) mol_(Ru)^(-1) h^(-1).Moreover,the reaction activity of catalyst in the fifth run was 36.5 mol_(MDA) mol_(Ru)^(-1) h^(-1),which was comparable with that of the fresh one.The computational results showed that g-C_(3)N_(4) as support was favorable for adsorption and dissociation of H_(2) molecules.Moreover,the substrate scope can be successfully expanded to a variety of other aromatic diamines.Therefore,this work provides an efficient and green catalyst system for selective hydrogenation of aromatic diamines. 展开更多
关键词 Nanosheet carbon nitride Ultrafine Ru species Selective hydrogenation Aromatic diamine Alicyclic diamine
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Ultrasonicwave-assisted tandem-reaction for synthesis of symmetrical vicinal diamines 被引量:2
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作者 Gen Rong Qiang Xiang Mei Wu Qin Wang Wen Pei 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第12期1469-1470,共2页
A practical synthesis of symmetrical vicinal diamines with broad chemistry scope is described. The key step is the ultrasonicwave promoted tandem-reaction, two-step reaction sequence combining Mannich double condensat... A practical synthesis of symmetrical vicinal diamines with broad chemistry scope is described. The key step is the ultrasonicwave promoted tandem-reaction, two-step reaction sequence combining Mannich double condensations with benzo- triazole, glyoxal and primary or secondary amines and reduction of the bis(benzotriazole)-adducts with sodium borohydride proceeded smoothly in tetrahydrofuran in high yield at room temperature. 展开更多
关键词 Vicinal diamine BENZOTRIAZOLE GLYOXAL Mannich reaction Synthesis
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Influences of Diamines on the Morphologies and the Chemical, Thermal, and Mechanical Properties of Polyurethane-Imide Elastomers 被引量:2
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作者 Tomohiro Ueda Tomohiro Nishio Shinichi Inoue 《Open Journal of Organic Polymer Materials》 2017年第4期47-60,共14页
Polyurethane-imide elastomers (PUIEs) are formed from isocyanate, polyol, acid anhydride, and diamine by liquid polymerization. Unfortunately, many of the diamines have rarely been applied to the formation of PUIEs. H... Polyurethane-imide elastomers (PUIEs) are formed from isocyanate, polyol, acid anhydride, and diamine by liquid polymerization. Unfortunately, many of the diamines have rarely been applied to the formation of PUIEs. Hence, investigating the effect of diamines on PUIEs remains a challenge in polymer chemistry. Herein, PUIEs prepared from 4,4'-diphenylmethane diisocyanate (MDI), polytetramethylene glycol (Mw: 1000), pyromellitic dianhydride, and aromatic diamines (such as p-phenylene diamine, 4,4'-oxydianiline, and 1,3-bis(4-aminophenoxy)benzene), and aliphatic diamines (such as 1,2-ethylene diamine, 1,6-hexamethylene diamine, and 1,12-dodecamethylene diamine) were synthesized by liquid polymerization. The morphologies and the chemical, thermal, and mechanical properties of the various PUIEs were investigated. The obtained elastomeric sheets were characterized in terms of the following tests and methods: solubility and swelling tests, X-ray diffraction and differential scanning calorimetry, dynamic mechanical analysis and thermogravimetric analysis, tensile tests, nuclear magnetic resonance spectroscopy, infrared spectroscopy, atomic force microscopy, contact angle microscopy, and scanning electron 展开更多
关键词 POLYURETHANE-IMIDE DIISOCYANATE POLYOL DIAMINE Pyromellitic DIANHYDRIDE Solution Polymerization
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Asymmetric Synthesis of Fluorinated Vicinal Diamines from Fluoromethyl Sulfinyl Imines and Diphenylmethylene-Benzylamines
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作者 何杰杰 李光锋 +1 位作者 孟卫东 黄焰根 《Journal of Donghua University(English Edition)》 EI CAS 2016年第3期358-365,共8页
A novel strategy was developed for the asymmetric synthesis of fluorinated vicinal diamines.Deprotonation of N-(diphenylmethylene)-benzylamines under base,followed by asymmetric nucleophilic addition to N-tert-butanes... A novel strategy was developed for the asymmetric synthesis of fluorinated vicinal diamines.Deprotonation of N-(diphenylmethylene)-benzylamines under base,followed by asymmetric nucleophilic addition to N-tert-butanesulfinylfluoroacetaldimines,a pair of diastereomeric isomers were afforded.The diastereomeric isomers can be easily separated from each other by silica gel column chromatography.The absolute steric configuration of two isomers was confirmed by single crystal X-ray diffraction analyses.The proposed mechanism revealed that the configuration of the carbon next to tert-butanesulfinyl was well controlled to be R by the chiral auxiliary. 展开更多
关键词 tert-butanesulfinyl vicinal diamine nucleophilic addition DIASTEREOSELECTIVITY FLUORINATED
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Preparation of Environmentally Friendly Urea-Hexanediamine-Glyoxal(HUG)Resin Wood Adhesive
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作者 Qianyu Zhang Shi Chen +4 位作者 Long Cao Hong Lei Antonio Pizzi Xuedong Xi Guanben Du 《Journal of Renewable Materials》 EI CAS 2024年第2期235-244,共10页
Using non-toxic,low-volatile glyoxal to completely replace formaldehyde for preparing urea-glyoxal(UG)resin adhesive is a hot research topic that could be of great interest for the wood industry.However,urea-glyoxal(U... Using non-toxic,low-volatile glyoxal to completely replace formaldehyde for preparing urea-glyoxal(UG)resin adhesive is a hot research topic that could be of great interest for the wood industry.However,urea-glyoxal(UG)resins prepared by just using glyoxal instead of formaldehyde usually yields a lower degree of polymerization.This results in a poorer bonding performance and water resistance of UG resins.A good solution is to pre-react urea to preform polyurea molecules presenting already a certain degree of polymerization,and then to condense these with glyoxal to obtain a novel UG resin.Therefore,in this present work,the urea was reacted with hexamethylene diamine to form a polyurea named HU,and then this was used to react it with different amounts of glyoxal to synthesize hexamethylenediamine-urea-glyoxal(HUG)polycondensation resins,and to use this for bonding plywood.The results show that the glyoxal can well react with HU polyuria via addition and schiff base reaction,and also the HUG resin exhibits excellent bonding strength and water resistance.The shear strength of the plywood bonded with this HUG at 160°C hot press temperature as high as 1.93 MPa,2.16 MPa and 1.61 MPa,respectively,which meets the requirement of the China national standard GB/T 9846-2015(≥0.7 MPa),and can be a good choice as a wood adhesive for industrial application. 展开更多
关键词 Urea-glyoxal resin hexamethylene diamine wood adhesives water resistance
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Synthesis of C1-symmetric primary-secondary diamines and their application in the enantioselective Henry reaction
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作者 Lili ZHANG Ming LIU +2 位作者 Shijun MA Yaodong HUANG Yongmei WANG 《Frontiers of Chemical Science and Engineering》 SCIE EI CAS CSCD 2013年第4期408-414,共7页
Two new Cl-symmetric primary-secondary diamines were synthesized via the reaction of (S,S)-1,2- diphenyl ethylene diamine with 3,5-ditert-butyl salicylal- dehyde and salicylaldehyde, respectively, followed by reduct... Two new Cl-symmetric primary-secondary diamines were synthesized via the reaction of (S,S)-1,2- diphenyl ethylene diamine with 3,5-ditert-butyl salicylal- dehyde and salicylaldehyde, respectively, followed by reduction with NaBH4. The combination of the ligand from 3,5-ditert-butyl salicylaldehyde with CuBr could effciently catalyze the Henry reaction to afford β- nitroalkanols in moderate to good yields (up to 87%) and high enantioselectivities (up to 88% ee). A possible mechanism of the reaction was proposed. 展开更多
关键词 enantioselective Henry reaction Cl-sym-metric diamines asymmetric reaction nitroalkanol
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Polyimides Based on Flexible Diamines:Synthesis, Characterization and Thermal Properties
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作者 M.Saeed Butt Zareen Akhtar +1 位作者 M.Zafar-uz-Zaman Arshad Munir 《复旦学报(自然科学版)》 CAS CSCD 北大核心 2007年第5期617-,共1页
1 Results and DiscussionTwo diamines 1,4-phenylene di(oxy-4,4′-aniline) and 4-aminophenyloxy-N-4-[(4-amiophenyloxy)benzylidene]aniline were prepared via the nucleopilic substitution reaction and were polymerized with... 1 Results and DiscussionTwo diamines 1,4-phenylene di(oxy-4,4′-aniline) and 4-aminophenyloxy-N-4-[(4-amiophenyloxy)benzylidene]aniline were prepared via the nucleopilic substitution reaction and were polymerized with 3,3′,4,4′-benzophenonetetracarboxylic acid dianhydride (BP), 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (HF) , 3,4,9,10-perylenetetracarboxylic acid dianhydride (PD) and pyromellitic dianhydride (PMDA) either by one step solution polymerization reaction or two step procedure. The l... 展开更多
关键词 polyimides ether diamines SOLUBILITY thermal stability
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Synthesis and Cytotoxic Evaluation of Novel Platinum(Ⅱ) Complexes with C2-Asymmetric and C2-Symmetric Chiral Vicinal Diamines
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作者 Chen Zhang Hongrui Liu +2 位作者 Qing Yang Jun Chang Xun Sun 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2013年第1期154-158,共5页
A series of new platinum(II) complexes with C2-asymmetric and C2-symmetric 1,2-diamines were designed and synthesized by convenient methods, involving samarium diiodide induced reductive coupling as the key step. Th... A series of new platinum(II) complexes with C2-asymmetric and C2-symmetric 1,2-diamines were designed and synthesized by convenient methods, involving samarium diiodide induced reductive coupling as the key step. The results of cytotoxicity showed that compounds (R,R)-lla and (S,S)-lla, two novel platinum(II) complexes with asymmetric 1,2-diamines, exhibited more potent cytotoxicity than that of oxaliplatin against all leukemia cell lines. Interestingly, (R,R)-lla and (S,S)-lla demonstrated less potent activity against three solid cancer cell lines than that of oxaliplatin, which indicated that these two compounds may only selectively inhibit the leukemia cell lines. In contrast, (R,R)-ISa and (S,S)-15a, two platinum(II) complexes with symmetric 1,2-diamines, showed similar cyto- toxicity to that of oxaliplatin against all leukemia cell lines and more potent activity against solid cancer cell lines. Further flow cytometry data indicated that (R,R)-lla could obviously arrest leukemia K562 cells in G2/M phases. 展开更多
关键词 platinum(II) complexes chiral vicinal diamines CYTOTOXICITY leukemia cell
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Stoichiometry and Stability Constant Values for Copper (II) Chelates with Ethylene Diamine in Deep Eutectic Solvents (DES) (Ethaline) Solutions
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作者 Khalid El Ttaib Abdolhadi Benhmid Rifat Hasan Omar 《Open Journal of Applied Sciences》 2024年第9期2592-2609,共18页
In this study we used the deep eutectic solvents (ionic liquids) to investigate the reaction between copper (II) with ethylene diamine (en). Two of the existing methods for analyzing spectrophotometric measurements ha... In this study we used the deep eutectic solvents (ionic liquids) to investigate the reaction between copper (II) with ethylene diamine (en). Two of the existing methods for analyzing spectrophotometric measurements have been applied for establishing, the stoichiometry and whenever possible, the stability constants of the chelates formed. The method of continuous variations was necessary to determine first whether, the metal ion and the ligand ethylene diamine form one or more than one chelate, when more than one chelate formed, the results obtained depend on the wavelength and for meaningful conclusions the wavelengths were carefully selected. The empirical formulae of the chelates were further substantiated by the molar ratio method. The effect of time and temperature on the formation and stability of these chelates in solution is also studied. The stability constants, K1 and K2 for the copper (II) chelates were calculated, though reliable, and are comparable to literature values. 展开更多
关键词 CU(II) Ethylene Diamine (en) Deep Eutectic Solvents Job’s Method Ionic Liquids and Stability Constant
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Asymmetric Pinacol Coupling of Aromatic Aldehydes Catalyzed by TiCl_4(THF)_2-Zn/Chiral Diamines 被引量:1
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作者 李有桂 蒋昌盛 +2 位作者 田青杉 柯玉萍 尤田耙 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2003年第10期1369-1372,共4页
Asymmetric pinacol coupling of aromatic aldehydes catalyzed by chiral diamines/low valent titanium complexes gave corresponding pinacols in good yields with high diastereoselectivity and moderate enantioselectivities.
关键词 chiral diamine pinacol asymmetric coupling ENANTIOSELECTIVITY
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Preparation and Characterization of Polysulfonamide Statistical Copolymers from Three Aromatic Diamines
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作者 刘丽 王维涛 肖长发 《Journal of Shanghai Jiaotong university(Science)》 EI 2010年第1期114-118,共5页
Various polysulfonamide (PSA) statistical copolymers were synthesized by polycondensation of three aromatic diamines and terephthaloyl chloride. The inherent viscosities of the resulting PSA copolymers range from 1.... Various polysulfonamide (PSA) statistical copolymers were synthesized by polycondensation of three aromatic diamines and terephthaloyl chloride. The inherent viscosities of the resulting PSA copolymers range from 1.54 to 1.66 dL/g. The precipitated PSA copolymers with feed content of p-phenylene diamine (PPD) being less than 50% (mole fraction) can be redissolved in N-methyl-2-pryrrolidone (NMP) or N, N-dimethylacetamide (DMAc) with lithium chloride of WLiC1 : 0.02. All of the PSA copolymers exhibit enhanced tensile strength in comparison with PSA and still maintain excellent thermal stability in either air or nitrogen atmosphere 展开更多
关键词 aromatic diamine terephthaloyl chloride (TPC) polysulfonamide (PSA) statistical copolymer oolvcondensation
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Synthesis and Characterization of New Macrocyclic Cu(Ⅱ) Complexes from Various Diamines, Copper(Ⅱ) Nitrate and 1,4-Bis(2-formylphenoxy)butane
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作者 ILHAN, Salih TEMEL, Hamdi KILIC, Ahmet 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2007年第10期1547-1550,共4页
Six new macrocyclic complexes were synthesized by a template reaction of 1,4-bis(2-formylphenoxy)butane with diamines and Cu(NO3)2·3H2O and their structures were proposed on the basis of elemental analysis, F... Six new macrocyclic complexes were synthesized by a template reaction of 1,4-bis(2-formylphenoxy)butane with diamines and Cu(NO3)2·3H2O and their structures were proposed on the basis of elemental analysis, FT-IR, UV-Vis, magnetic susceptibility measurements, molar conductivity measurements and mass spectra. The metal to ligand molar ratios of the Cu(Ⅱ) complexes were found to be 1 : 1. The Cu(Ⅱ) complexes are 1 : 2 electrolytes as shown by their molar conductivities (∧m) in DMF at 10^-3 mol·L^-1. Due to the existence of free ions the Cu(Ⅱ) complexes are electrically conductive. Their configurations were proposed to be probably distorted octahedral. 展开更多
关键词 macrocyclic Schiff base complex 1 4-bis(2-formylphenoxy)butane diamine copper(Ⅱ) complex
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Value of combining the serum D-lactate, diamine oxidase, and endotoxin levels to predict gut-derived infections in cancer patients
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作者 Shou-Mei Yang Xiao-Dan Zhang +7 位作者 Huai-XingMa DanWu XingLiu Hao-Bin Yu Shi-Wei Li Wen-Jun Gao Wei-Wei Liu Su-Yi Li 《Journal of Nutritional Oncology》 2023年第2期101-106,共6页
Objective:This is a retrospective observational cohort study.The objective of this retrospective observational cohort study was to evaluate the value of the combined serum D-lactic acid,diamine oxidase(DAO),and endoto... Objective:This is a retrospective observational cohort study.The objective of this retrospective observational cohort study was to evaluate the value of the combined serum D-lactic acid,diamine oxidase(DAO),and endotoxin levels to predict intestinal barrier impairment and gut-derived infection(GDI)in cancer patients.Methods:Cancer patients receiving chemotherapy or palliative care treatment at our hospital were enrolled in the study.The serum concentrations of DAO,D-lactic acid,and endotoxin were determined using the intestinal barrier function biochemical index analysis system.The patients'infection information came from the hospital's Medicom Prescription Automatic Screening System and themedical records.Three hundred fifty-three cancer patients were included in the study(53.8%female,73.7%cancer stage IV,27.8%had bowel obstruction).Results:The total incidence of GDI was 33.4%(118/353).The median length of hospital stay was 16 days for patients with GDI,compared with 7 days for patients without GDI(P<0.001).The media hospitalization costs were¥27,362.35 for patients with GDI compared with¥11,614.08 for patients without GDI(P<0.001).The serum concentrations of DAO,D-lactic acid,and endotoxin were significantly higher in patients with GDI.As malignant bowel obstruction(MBO)worsened,the concentrations of DAO,D-lactic acid,and endotoxin increased.Multivariate logistic regression models revealed that the DAO,endotoxin,IL-6,and C-reactive protein levels were significantly associated with an increased risk of GDI.In addition,we also found a fivefold increased risk of infection in patients withMBO compared with those without bowel obstruction(OR=6.210,P<0.001).All of the areas under the receiver operating characteristic curve(AUCs)for DAO,D-lactate,and endotoxin to predict GDI were<0.7(AUC=0.648,P<0.001;AUC=0.624,P<0.01;AUC=0.620,P<0.01,respectively).However,when the parameters were combined(DAO+D-lactate+endotoxin),the predictive power increased significantly(AUC=0.797,P<0.001).Moreover,combining these intestinal barrier indicators and the presence of MBO had better power to predict GDI than either alone(AUC=0.837,P<0.001).Conclusions:Combining the serum DAO,D-lactic acid,and endotoxin levels was a better predictor of GDI than any of the indicators alone,and combining these with the diagnosis of MBO could further improve the efficacy for predicting GDI. 展开更多
关键词 Cancer Diamine oxidase D-Lactic acid ENDOTOXIN Gut-derived infection
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血清二胺氧化酶测定的临床应用进展 被引量:29
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作者 侯玥 宫平 +1 位作者 杨羽 于源华 《中国实验诊断学》 2015年第11期1985-1986,F0003,共3页
二胺氧化酶(diamine oxidase;DAO,E.C.1.4.3.6)是存在于哺乳动物小肠的黏膜或纤毛上皮细胞中催化二胺的细胞内酶,它可通过调节细胞内的离子平衡、影响传导通路、促进细胞修复,对肠黏膜具有保护作用[1]。小肠黏膜屏障功能衰竭时或肠黏... 二胺氧化酶(diamine oxidase;DAO,E.C.1.4.3.6)是存在于哺乳动物小肠的黏膜或纤毛上皮细胞中催化二胺的细胞内酶,它可通过调节细胞内的离子平衡、影响传导通路、促进细胞修复,对肠黏膜具有保护作用[1]。小肠黏膜屏障功能衰竭时或肠黏膜细胞坏死时血清DOA升高,因此,血液中的DOA活性可反映肠道损伤状态[2,3]。 展开更多
关键词 血清二胺氧化酶 小肠黏膜 慢性荨麻疹 多器官功能障碍 纤毛上皮细胞 先兆流产 细胞内酶 DIAMINE 屏障功能 细胞修复
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耐盐性高吸水树脂的辐照合成及其后处理工艺 被引量:4
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作者 李莉 楚立凯 +2 位作者 黄伟虹 岳凌 杨占山 《核技术》 CAS CSCD 北大核心 2014年第7期31-36,共6页
本实验提供了一种新的PVA/PAAS/EDTA高吸水性树脂及其制备方法。采用聚乙烯醇(Poly vinyl alcohol,PVA)、聚丙烯酸钠(Poly acrylate sodium,PAAS)和乙二胺四乙酸(Ethylene diamine tetraacetic acid,EDTA),将由这些材料组成的水溶液经... 本实验提供了一种新的PVA/PAAS/EDTA高吸水性树脂及其制备方法。采用聚乙烯醇(Poly vinyl alcohol,PVA)、聚丙烯酸钠(Poly acrylate sodium,PAAS)和乙二胺四乙酸(Ethylene diamine tetraacetic acid,EDTA),将由这些材料组成的水溶液经电子束辐射交联合成共聚物凝胶,经浸洗液溶胀和洗涤,萃冻和冷冻干燥后处理,制备出耐盐性高吸水性树脂。采用正交设计原理选出最佳配比,用不同配比的洗涤液进行后处理,研究洗涤液对树脂吸液性能的影响。测试树脂的各项性能,与国内外著名产品进行比较。结果表明,本实验制备出的高吸水性树脂具有优良的吸液速率和离心保液量,去离子水吸液倍率((821.05±1.61)g·g-1)和生理盐水吸液倍率((72.57±3.01)g·g-1)则非常显著地优于国内外著名高吸水性树脂产品(P±0.01)。 展开更多
关键词 关键词高吸水性树脂(Super ABSORBENT resin SAR) 辐射交联 乙二胺四乙酸(Ethylene DIAMINE tetraaceticacid EDTA) 耐盐性 电子束
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SYNTHESIS AND PROPERTIES OF NOVEL POLY(IMINO KETONE)S AS HIGH-PERFORMANCE POLYMERS 被引量:11
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作者 Chang, Guan-jun Luo, Xuan +1 位作者 Zhang, Lin Lin, Run-xiong 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第1期55-61,共7页
Di(4-bromophenyl)ketone and various aromatic diamines as the monomers,a series of novel poly(imino ketone)s (PIKs)have been synthesized via palladium-catalyzed aryl amination,which is Hartwig-Buchwald polycondensation... Di(4-bromophenyl)ketone and various aromatic diamines as the monomers,a series of novel poly(imino ketone)s (PIKs)have been synthesized via palladium-catalyzed aryl amination,which is Hartwig-Buchwald polycondensation reaction.The structures of PIKs are characterized by means of elemental analysis,FT-IR,~1H-NMR and UV-Vis spectroscopy. The results show a good agreement with the proposed structure.The general properties of PIKs are studied by DSC,TG and wide-angle X-ray diffraction,the solubility behavior is... 展开更多
关键词 Di(4-bromophenyl)ketone Aromatic diamines Palladium-catalyzed aryl amination High-performance Poly(imino ketone)
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Synthesis and Characterization of Polyamides Based on Dimer Acid
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作者 王文志 章永化 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2009年第3期367-370,共4页
A series of dimer acid-based polyamides were synthesized by melt-polycondensation of dimer acid and various aromatic diamines, and were characterized by Fourier transform infrared spectrum (FT-IR) and nuclear magnet... A series of dimer acid-based polyamides were synthesized by melt-polycondensation of dimer acid and various aromatic diamines, and were characterized by Fourier transform infrared spectrum (FT-IR) and nuclear magnetic resonance (^1H NMR). The physical properties of the polyamides, such as glass transition temperature, melting temperature, decomposition temperature and mechanical properties were also investigated. The polyamides' intrinsic viscosity ranges from 1.8 dL·g^-1 to 2.2 dL·g^-1, and the melting temperature ranges from 140 ℃ to 181 ℃. The glass transition temperatures, observed from dynamic mechanical analysis, fall in the range of 34.8-48.2 ℃. The physical and mechanical properties of the resultant polyamides are similar to those of the PA1212. The heat resistance and mechanical properties of poly (4, 4′-diphenylsulfone dimeramide) (PSD) and poly(4, 4′-di pb enyl dimeramide) (PPDI) are comparable to those of PA 1212. 展开更多
关键词 polyamides dimer acid POLYCONDENSATION aromatic diamines
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Thermo-oxidative Oligomerization of Aromatic Diamine
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作者 B.А.Zaitsev L.G.Kleptsova +1 位作者 I.D.Shvabskaya А.E.Bursian 《Organic Polymer Material Research》 2021年第1期24-31,共8页
Molecular spectroscopy(electronic,FT-IR,NMR),methods of thermal and elemental analysis were used for the first time to describe the process of thermo-oxidative oligomerization of 1,3-bis-(4-aminophenoxy)benzene.Introd... Molecular spectroscopy(electronic,FT-IR,NMR),methods of thermal and elemental analysis were used for the first time to describe the process of thermo-oxidative oligomerization of 1,3-bis-(4-aminophenoxy)benzene.Introduction of this monomer into linear and network copolymers makes it possible to improve processability,mechanical strength and heat resistance of materials.The structures of copolymers obtained by thermo-oxidation of the diamine in various thermal regimes were studied.It was demonstrated that during prolonged heating of this diamine in air in the temperature range from 220 to 320°C,oligomeric aromatic diamines were formed;these products contained fragments of benzenoid and quinoid types. 展开更多
关键词 Aromatic diamines Oxidative oligomerization Thermal properties Molecular spectroscopy
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