| TDI扩链端羟基聚乳酸的研究 |
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| 引用本文： | 张昭,陈春兰,樊国栋.TDI扩链端羟基聚乳酸的研究[J].聚氨酯工业,2010,25(6):21-23,31. |
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| 作者姓名： | 张昭 陈春兰 樊国栋 |
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| 作者单位： | 教育部轻化工助剂化学与技术重点实验室陕西科技大学化学与化工学院,西安710021 |
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| 基金项目： | 陕西省科技攻关项目，陕西省教育厅专项科研计划项目 |
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| 摘 要： | 以1,4-丁二醇和乳酸在辛酸亚锡催化下,进行熔融缩聚反应,形成端羟基聚乳酸,再以2,4-甲苯二异氰酸酯(TDI)进行扩链反应,合成可溶性聚酯型聚氨酯共聚物。用粘均相对分子质量、红外光谱、XRD对产物进行表征。结果表明,在nNCO∶nOH=1.0∶1.0、170℃和0.096 MPa条件下反应30 min,可得到粘均相对分子质量为13.2万的扩链产物,为扩链前端羟基聚乳酸的6.3倍;XRD测试表明,扩链使结晶度由扩链前27.95%下降到扩链后6.94%。
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| 关 键 词： | 2 4-甲苯二异氰酸酯 端羟基聚乳酸 1 4-丁二醇 扩链 生物降解材料 |
Study on the Synthesis of Hydroxy-Terminated Polylactic Acid Chain Extended by 2,4-Toluylene Diisocyanate |
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| Zhang Zhao,Chen Chunlan,Fan Guodong.Study on the Synthesis of Hydroxy-Terminated Polylactic Acid Chain Extended by 2,4-Toluylene Diisocyanate[J].Polyurethane Industry,2010,25(6):21-23,31. |
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| Authors: | Zhang Zhao Chen Chunlan Fan Guodong |
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| Affiliation: | Zhang Zhao Chen Chunlan Fan Guodong(Key Laboratory of Auxiliary Chemistry ＆ Technology for Chemical Industry,Ministry of Education,College Chemistry ＆ Chemical Engineering,Shanxi University of Science ＆ Technology,Xi＇an 710021,China) |
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| Abstract: | The hydroxy-terminated polylactic acid（HO-PDLLA-OH） was prepared with D,L-lactic acid and 1,4-butylene glycol through condensational polymerization catalyzed by stannous octoate.Using HO-PDLLA-OH as prepolymer,2,4-toluylene diisocyanate（TDI） as chain extender,the soluble poly（ester urethane） copolymer was synthesized in melt state.The product was characterized by viscosity-average molecular weight（Mη）,IR,XRD.The results showed that interpolymer was synsthesized as follows,nOH∶nNCO was 1.0∶1.0,reacting for 30 min at 170℃ under pressure of 0.096 MPa.The Mη of chain extension product was 132 thousand and was 6.3 times higher than the hydroxy-terminated polylactic acid.XRD test showed that crystallinity dropped from 27.95% to 6.94%. |
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| Keywords: | 2 4-toluylene diisocyanate hydroxyl-terminated poly（lactic acid） 1 4-butylene glycol chain extension biodegradable material |
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