Conformation order of poly(l-lactic acid) chains during the melt crystallization process: infrared and two-dimensional infrared correlation spectroscopy study

被引:0
|
作者
Yaoqi Shi
Dongkang Hu
Zhong Xin
Shicheng Zhao
Shuai Zhou
Xing Meng
机构
[1] East China University of Science and Technology,Shanghai Key Laboratory of Multiphase Material Chemical Engineering, College of Chemical Engineering
[2] East China University of Science and Technology,State
来源
Journal of Materials Science | 2016年 / 51卷
关键词
PLLA; Isothermal Crystallization; Interchain Interaction; Neat PLLA; PLLA Film;
D O I
暂无
中图分类号
学科分类号
摘要
Chain conformation order of poly (l-lactic acid) (PLLA) was investigated by time-lapsed Fourier transform infrared (FTIR) spectroscopy and two-dimensional infrared correlation spectroscopy during the isothermal crystallization at 140 °C. The result showed that the PLLA formed α-crystal during the isothermal crystallization at 140 °C. According to the detailed information in the region of 1000–1500 cm−1 investigated by infrared and 2D correlation spectroscopy, it was found that the conformation of C–O–C groups changed prior to that of CH3 groups. Moreover, the formation of the initial helix chain conformation was interfered by the interchain interactions between the CH3 groups, which consequently resulted in the formation of α-crystal with the distorted 103 helix conformation.
引用
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页码:4880 / 4887
页数:7
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