| PLA-b-PEG共聚物膜的制备与性能研究 |
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| 引用本文： | 李继航,胡娜,孔蕊,徐亚鹏,倪忠斌,陈明清.PLA-b-PEG共聚物膜的制备与性能研究[J].应用化工,2009,38(6):819-822. |
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| 作者姓名： | 李继航 胡娜 孔蕊 徐亚鹏 倪忠斌 陈明清 |
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| 作者单位： | 江南大学,化学与材料工程学院,江苏,无锡,214122 |
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| 基金项目： | 江苏高等学校科技创新团队资助项目 |
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| 摘 要： | 使乳酸(LA)和数均相对分子量2000的聚乙二醇(PEG)在180℃下的二甲苯中进行溶液缩聚,制得了聚乳酸-聚乙二醇嵌段(PLA-b-PEG)共聚物,PLA-b-PEG的分子量随反应时间的延长而增大,分子量分布保持在较窄的范围内;改变LA与PEG的投料比,可将PLA-b-PEG嵌段共聚物的玻璃化转变温度控制在35.6~54.3℃,有利于室温下膜的形成以及膜性能的稳定。采用铸膜法制得了透明的PLA-b-PEG共聚物膜,用动态接触角测试表明,随着PEG的增加接触角减小、亲水性增大,可望应用于生物医学材料领域。
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| 关 键 词： | 乳酸 嵌段共聚物 膜 动态接触角 力学性能 |
Preparation and properties of PLA-b-PEG copolymer film |
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| LI Ji-hang,HU Na,KONG Rui,XU Ya-peng,NI Zhong-bin,CHEN Ming-qing.Preparation and properties of PLA-b-PEG copolymer film[J].Applied chemical industry,2009,38(6):819-822. |
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| Authors: | LI Ji-hang HU Na KONG Rui XU Ya-peng NI Zhong-bin CHEN Ming-qing |
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| Abstract: | PLA-b-PEG block copolymers were synthesized by solution polycondensation of lactic acid and poly(ethylene glycol)(PEG) having a number average molecular weight of 2000 as raw materials in dimethylbenzene at 180 ℃.It was found that molecular weight increased through increasing reaction time.The glass transfer temperatures of PLA-b-PEG were controlled between 35.6 and 54.3 ℃ by changing the ratio of LA and PEG due to formation and stability of the film.The transparent films of PLA-b-PEG block copolymers were prepared by membrane casting method.The result showed that dynamic contact angle was increased through increasing the content of PEG in feed.It was used in biomedical materials field hopefully. |
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| Keywords: | lactic acid block copolymer film dynamic contact angle mechanical performance |
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