氯化亚锡/萘二磺酸对D,L乳酸聚合物微结构的影响

doi:10.3969/j.jssn.1000-2006.2009.03.026

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南京林业大学学报（自然科学版） ›› 2009, Vol. 33 ›› Issue (03): 111-115.doi: 10.3969/j.jssn.1000-2006.2009.03.026

氯化亚锡/萘二磺酸对D,L乳酸聚合物微结构的影响

高勤卫1，何刚2，李明子1，徐柏森3

1.南京林业大学化学工程学院，江苏南京210037；2.南京信息工程大学环境学院，江苏南京210044； 3.南京林业大学森林资源与环境学院，江苏南京210037

出版日期:2009-06-18 发布日期:2009-06-18
基金资助:
收稿日期：2008-08-29修回日期：2009-02-18基金项目：国家自然科学基金资助项目(50573032)作者简介：高勤卫(1968—)，副教授，博士，研究方向为生物高分子材料、环境友好高分子材料、高分子物理与化学。Email: Qinway_gao@yahoo.com.cn。引文格式：高勤卫,何刚,李明子,等. 氯化亚锡/萘二磺酸对D,L乳酸聚合物微结构的影响[J]. 南京林业大学学报:自然科学版,2009,33(3):111-115.

The effects of SnCl2/naphthalene disulphonic acid on the microstructure of polymers prepared from D,Llactic acid

GAO Qinwei1, HE Gang2, LI Mingzi1, XU Baisen3

1.College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China; 2.College of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; 3.College of Forest Resources and Environment, Nanjing Forestry University, Nanjing 210037, China

Online:2009-06-18 Published:2009-06-18

摘要/Abstract

摘要： 以D,L乳酸为原料，氯化亚锡(SnCl2)与萘二磺酸(NDA)为催化剂体系，熔融缩聚制备聚乳酸，并采用旋光度法、1HNMR和13CNMR核磁共振法、X射线衍射和黏度法等研究萘二磺酸对聚乳酸微结构的影响。SnCl2和NDA分别催化D,L乳酸聚合可制备消旋的非晶态聚乳酸，而SnCl2/NDA催化体系所得的聚乳酸是高光学活性的L构型的结晶聚合物。SnCl2/NDA催化体系具有高度的立构选择性，且SnCl2与NDA配比及其用量对聚乳酸的光学活性、分子链的构型、链段序列分布和晶体结构等微结构均有明显的影响。当SnCl2质量分数为0.5%、n(SnCl2)/n(NDA)为1∶1时，D,L乳酸熔融缩聚可制备光学纯度97.4%的高光学活性的L型聚乳酸。

Abstract: Polys (lactic acid) was prepared from D,Llactic acid through melt polycondesation. Viscometry, polarimetry, 1HNMR, 13CNMR and XRD were performed to detect poly(lactic acid) (PLA) samples. PLA with excessive Lonformation units in polymer chains can be obtained using SnCl2 and naphthalene disulphonic acid (NDA) as catalyst system. Ratios of SnCl2 and NDA and its contents affected the opitical purities of PLAs, PLA microstructures of chains and cryticals. When SnCl2 content was 0.5% and n(SnCl2)/n(NDA) 1∶1, PLA with opitical purity 97.4% was then obtained from D,Llactic acid.

中图分类号:

O633.14

高勤卫,何刚,李明子,等. 氯化亚锡/萘二磺酸对D,L乳酸聚合物微结构的影响[J]. 南京林业大学学报（自然科学版）, 2009, 33(03): 111-115.

GAO Qinwei1, HE Gang2, LI Mingzi1, XU Baisen3. The effects of SnCl2/naphthalene disulphonic acid on the microstructure of polymers prepared from D,Llactic acid[J].Journal of Nanjing Forestry University (Natural Science Edition), 2009, 33(03): 111-115.DOI: 10.3969/j.jssn.1000-2006.2009.03.026.

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氯化亚锡/萘二磺酸对D,L乳酸聚合物微结构的影响

The effects of SnCl2/naphthalene disulphonic acid on the microstructure of polymers prepared from D,Llactic acid

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