| 壳聚糖-聚乳酸接枝共聚物的制备与表征 |
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| 引用本文： | 袁华,葛芳芳,乔馨乐,任杰.壳聚糖-聚乳酸接枝共聚物的制备与表征[J].高分子材料科学与工程,2009(12). |
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| 作者姓名： | 袁华 葛芳芳 乔馨乐 任杰 |
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| 作者单位： | 同济大学材料科学与工程学院; |
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| 摘 要： | 将醛基化改性的聚乳酸接枝到壳聚糖,并通过元素分析、红外光谱(IR)、核磁共振(1H-NMR)、X射线衍射(XRD)和热重分析(TG)分别对接枝产物的接枝率、结构和结晶性能进行表征。IR和1H-NMR结果表明聚乳酸成功接枝到壳聚糖主链,不同投料比和接枝率的关系与元素分析一致;PLLA-CHO/CS-NH2最佳摩尔比为1∶2.5,此时的接枝率为52.22%;XRD和TG结果表明接枝产物的结晶度和热分解温度降低,说明壳聚糖的高结晶性得到改善,其应用范围扩大。
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| 关 键 词： | 聚乳酸 壳聚糖 接枝共聚 |
Preparation and Characterization of Chitosan-g-Poly(L-lactide) Copolymer |
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| YUAN Hua,GE Fang-fang,QIAO Xin-le,REN Jie.Preparation and Characterization of Chitosan-g-Poly(L-lactide) Copolymer[J].Polymer Materials Science & Engineering,2009(12). |
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| Authors: | YUAN Hua GE Fang-fang QIAO Xin-le REN Jie |
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| Affiliation: | YUAN Hua,GE Fang-fang,QIAO Xin-le,REN Jie (School of Materials Science and Engineering,Tongji University,Shanghai 200092,China) |
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| Abstract: | A series of chitosan-g-poly(L-lactide)(CS-g-PLLA)copolymers with different grafting percentage were synthesized via modified PLLA.The grafting percentage of the copolymers was analyzed by elementar analyzer,and structure of copolymers was characterized by infrared spectrum(IR) and 1H nuclear magnetic resonance spectrum(1H-NMR).The non-isothermal crystallization and crystallinity behaviors were studied by X-ray diffraction(XRD).The highest grafting percentage of 52.22% was obtained at the molar feed ratio of... |
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| Keywords: | polylactide chitosan graft copolymerization |
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