| 聚乙二醇改性聚乳酸的合成与性能表征 |
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| 引用本文： | 樊国栋,陈春兰,刘香云,张昭.聚乙二醇改性聚乳酸的合成与性能表征[J].功能材料,2010,41(2). |
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| 作者姓名： | 樊国栋 陈春兰 刘香云 张昭 |
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| 作者单位： | 陕西科技大学,化学与化工学院,教育部轻化工助剂化学与技术重点实验室,陕西,西安,710021 |
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| 基金项目： | 陕西省科技攻关资助项目(2008K07-32);;陕西省咸阳市科技计划资助项目(XK07011-2);;陕西科技大学研究生创新基金对本项目的大力资助 |
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| 摘 要： | 以外消旋乳酸(D,L-LA)和不同数均分子量(Mn)的聚乙二醇(PEG)为原料,通过熔融缩聚法,合成了系列聚乳酸聚乙二醇(PLEG)。最佳工艺条件为:以(Sn(Oct)2)为催化剂,m(Sn(Oct)2)为0.8%,n(PEG)∶n(D,L-LA)=1∶600,聚合温度170℃,压力0.096 MPa条件下,反应8h。用特性粘度测试、FT-IR、XRD、接触角等对其进行表征,实验结果表明系列PLEG中PLEG-800接触角为63°,表明其亲水性能最好;PEG-800和乳酸共聚合成的PLEG的粘均分子量最大,可达48997,与PDLLA相比,结晶度有较大提高,亲水性得到改善。
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| 关 键 词： | 聚乳酸 熔融缩聚 聚乳酸-聚乙二醇 亲水性 表征 |
Synthesis and characterization of poly(ethyleneglyeol) modified poly(lactide) |
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| FAN Guo-dong,CHEN Chun-lan,LIU Xiang-yun,ZHANG Zhao.Synthesis and characterization of poly(ethyleneglyeol) modified poly(lactide)[J].Journal of Functional Materials,2010,41(2). |
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| Authors: | FAN Guo-dong CHEN Chun-lan LIU Xiang-yun ZHANG Zhao |
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| Affiliation: | Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry;Ministry of Education;College Chemistry & Chemical Engineering;Shaanxi University of Science & Technology;Xi'an 710021;China |
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| Abstract: | The biodegradable material poly(D,L-lactic acid)-polyethylene glycol(PLEG) was synthesized with stannous octanoate as catalyst via directly melt polycondensation of D,L-racemic lactic acid (D,L-LA) as monomer with PEG-400,600,800,1000 and 2000 at molar ratio n(PEG)/n(D,L-LA)=1/600.The copolymerization reaction was performed at temperature of 170℃,m(Sn(Oct)_2) of 0.8%,and pressure of 0.096MPa for 8h.The PLEGs were characterized by viscosity-average molecular weight,FT-IR,XRD and contact angle testing.The results demonstrate that the contact angle of PLEG-800 was 63°and the maximum M_η of PLEG-800 can reach 48997.Better hydrophilicity and crystallinity can be reached in case of PEG is chosen as 800,compared with poly(D,L-lactic acid). |
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| Keywords: | polylactic acid melt polycondensation polylactic acid-polyethylene glycol hydrophilicity characterization |
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