| 第 37 卷第 3 期 |  | Vol. 37 No. 3 | | 2007 年 6 月 | Jun 2007 |
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所属栏目：功能材料
聚乳酸中间体——丙交酯制备工艺 |
| 张跃军，吴晓莉，刘英豪，邓雪莲
（南京理工大学 化工学院，江苏 南京 210094） |
| 摘 要：研究了间接法合成聚乳酸用的中间体丙交酯的制备工艺。以工业D，L-乳酸（lactic acid）为原料，丙交酯粗产物的收率为考查指标，通过正交实验得到了最佳制备工艺条件为：以4%（v／v）的辛酸亚锡为催化剂，脱水温度为180℃，解聚温度为285℃，得到粗产物收率为72.4%。粗品丙交酯1次重结晶后收率为59.3%，熔点为95.0～96.2℃；5次重结晶后总收率为50.7%，熔点为125.2～126.5℃。同时采用FTIR与1H NMR对产物进行了结构表征。 |
| 关键词：丙交酯；乳酸；聚乳酸 |
| 中图分类号：O633 文献标识码：A 文章编号：1009-9212（2007）03- 0058-05 |
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| Preparation of Polylactic Acid Intermediate Lactide |
| ZHANG Yue-jun，WU Xiao-li，LIU Ying-hao，DENG Xue-lian
（School of Chemical Engineering，Nanjing University of Science and Technology，Nanjing 210094，China） |
| Abstract：Preparation of lactide was carried out using indirect method in this paper. Lactide was synthesized from industrial monomer D，L-lactic acid as raw material. The optimal conditions for synthesis of lactide were investigated by the orthogonal experiments. Results indicated that under the optimal conditions such as using v（Sn（Oct）2）／v（Lactic acid）=0.4∶1 Sn（Oct）2 as catalyst，dehydration temperature 180℃ and decomposing temperature 285℃，the yield of lactide reach 72.4%，and the yield of lactide reached 59.3% after the first recrystalization，and its melting point ranged from 95.0℃ to 96.2℃. The yield of lactide reached to 50.7% and its melting point ranged from 125.2℃ to 126.5℃ after the fifth recrystallization. FTIR and 1H NMR were used to characterizing the products. |
| Key words：lactide；lactic acid；poly-lactic acid |
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作者简介：张跃军（1959-），男，山东苍山人，教授，博士生导师，从事水溶性高分子、表面活性剂、含能材料的研究。（E-mail：zhyuejun@mail.njust.edu.cn）
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收稿日期： 2007-03-1
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