| 星形聚乙二醇-聚乳酸嵌段共聚物的合成与表征 |
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| 引用本文： | 张安强,林雅铃,魏芬芬,王炼石.星形聚乙二醇-聚乳酸嵌段共聚物的合成与表征[J].高分子材料科学与工程,2011(11):84-88. |
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| 作者姓名： | 张安强 林雅铃 魏芬芬 王炼石 |
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| 作者单位： | 华南理工大学材料科学与工程学院;华南农业大学资源与环境学院; |
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| 基金项目： | 广东省自然科学基金资助项目(07300675); 广东省高性能与功能高分子材料重点实验室开放基金资助项目; 华南农业大学校长基金新学科扶持基金项目;华南农业大学资源环境学院院长基金项目 |
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| 摘 要： | 以不同臂数和分子量的星型聚乙二醇(sPEG)和L-丙交酯为原料,采用开环聚合法合成了以星型聚乙二醇为内部嵌段、聚L-乳酸为外部嵌段的多臂星形聚乙二醇-聚乳酸嵌段共聚物(sPEG-b-PLLA)。研究了sPEG的臂数、分子量及L-丙交酯/sPEG投料比等参数对产物结构与性能的影响。并分别用红外光谱(FT-IR)、核磁共振(1H-NMR)、凝胶渗透色谱(GPC)、差示扫描量热(DSC)对产物进行了表征,证实所合成的嵌段共聚物具有预期的结构。结果表明,sPEG-b-PLLA为结晶性聚合物,且表现出与PLLA相似的晶型,随着PLLA链段的增加,产物的结晶度也呈增大的趋势;与PLLA相比,sPEG-b-PLLA的接触角随着PEG链段的增多而增大,表明其亲水性明显改善。
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| 关 键 词： | 星形聚乙二醇-聚乳酸嵌段共聚物 星型聚乙二醇 开环聚合 |
Synthesis and Characterization of Multi-Arm Star-Shaped Poly(Ethylene Glycol)-b-Poly(L-Lactide) Copolymer Prepared by Ring-Opening Polymerization |
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| Anqiang Zhang,Yaling Lin,Fenfen Wei,Lianshi Wang.Synthesis and Characterization of Multi-Arm Star-Shaped Poly(Ethylene Glycol)-b-Poly(L-Lactide) Copolymer Prepared by Ring-Opening Polymerization[J].Polymer Materials Science & Engineering,2011(11):84-88. |
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| Authors: | Anqiang Zhang Yaling Lin Fenfen Wei Lianshi Wang |
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| Affiliation: | Anqiang Zhang1,Yaling Lin2,Fenfen Wei1,Lianshi Wang1(1.College of Materials Science and Engineering,South China University of Technology,Guangzhou 510641,China,2.College of Environment and Resources,South China Agriculture University,Guangzhou 510642,China) |
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| Abstract: | Biodegradable,amphiphilic,diblock multi-arm star-shaped poly(ethylene glycol)-block-poly(L-lactide) copolymer(sPEG-b-PLLA) were prepared by ring-opening polymerization of L-lactide in the presence of multi-arm sPEG and a catalytic amount of stannous octoate,in which three types of sPEG,i.e.,sPEG1(4-arm,n=4300),sPEG2(3-arm,n=3200) and sPEG3(4-arm,n=12400) were chosen as the core of the block copolymer.The polymers,including sPEG and sPEG-b-PLLA copolymers with varied core and varied lactide/sPEG ratios were ... |
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| Keywords: | multi-arm poly(ethylene glycol)-block-poly(L-Lactic acid) copolymer star shaped poly(ethylene glycol) ring-opening polymerization |
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