| 聚乳酸端羟基扩链研究 |
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| 引用本文： | 张建宇,周静宜,陈玉顺.聚乳酸端羟基扩链研究[J].合成纤维工业,2007,30(4):27-29,33. |
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| 作者姓名： | 张建宇 周静宜 陈玉顺 |
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| 作者单位： | 北京服装学院材料科学与工程,北京,100029 |
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| 摘 要： | 采用两步法工艺对乳酸进行了扩链聚合。首先将聚乳酸熔融后,用1,4-丁二醇进行醇酸缩合,制成羟基封端的预聚物;然后加入甲苯-2,4-二异氰酸酯进行扩链生成高相对分子质量的聚乳酸,并通过IR、~1H-NMR和DSC等方法对产物进行了表征。最佳反应工艺条件:与预聚物等摩尔量的1,4-丁二醇,辛酸亚锡催化,n_(NCO)∶n_(OH)为1∶1,160℃真空条件下反应100 min。聚乳酸的相对分子质量提高两倍以上,同时玻璃化转变温度由59℃提高到63℃。
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| 关 键 词： | 聚乳酸 扩链 甲苯-2，4-二异氰酸酯 1，4-丁二醇 |
| 文章编号： | 1001-0041（2007）04-0027-03 |
| 修稿时间： | 2006-12-212007-01-15 |
Study on hydroxyl-terminated chain extension for poly( lactic acid) |
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| Zhang Jianyu,Zhou Jingyi,Chen Yushun.Study on hydroxyl-terminated chain extension for poly( lactic acid)[J].China Synthetic Fiber Industry,2007,30(4):27-29,33. |
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| Authors: | Zhang Jianyu Zhou Jingyi Chen Yushun |
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| Affiliation: | Institute of Polymer Material and Engineering, Beijing Institute of Clothing Technology, Beijing 100029 |
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| Abstract: | The chain extending polymerization for poly(lactic acid)was performed by two-step process.Poly(lactic acid)was melted and synthesized into hydroxyl-terminated prepolymer by alkyd condensation with 1,4-butanediol.And 2,4-toluene-diisocy- anate was introduced into the prepolymer to produce high-molecular weight poly(lactic acid)through chain extension.The prod- uct was characterized by IR,~1H-NMR and DSC.The molecular weight of the obtained poly(lactic acid)was increased more than two times and the glass transition temperature was raised from 59℃to 63℃when the reaction process was optimized as followed: 1,4-butanediol equal to the prepolymer in mole,stannous octoate as a catalyst,n_(NCO):n_(OH)of 1:1,reacting for 100 min at 160℃under vacuum. |
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| Keywords: | poly(lactic acid) chain extension toluene-2 4-diisocyanate 1 4-butanediol |
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