Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics

Yuan-ying Liang; Hu Tang; Gan-ji Zhong; Zhong-ming Li

doi:10.1007/s10118-014-1505-y

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Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics

Updated：2021-06-21

- Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics
- Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics
- Chinese Journal of Polymer Science 2014年32卷第9期页码：1176-1187
- Affiliations：
  
  College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- Author bio：
  
  **Gan-ji Zhong (钟淦基), E-mail: ganji.zhong@scu.edu.cn
  Zhong-ming Li (李忠明), E-mail: zmli@scu.edu.cn
- Funds：
  
  National Natural Science Foundation of China(51120135002;51203104);Doctoral Program of the Ministry of Education of China(20120181120101);Program of Introducing Talents of Discipline to Universities(B13040);Innovation Team Program of Science & Technology Department of Sichuan Province(2013TD0013)
- DOI：10.1007/s10118-014-1505-y
  中图分类号：
- 收稿：2014-03-18，
  
  修回：2014-04-24，
  
  录用：2014-05-09，
  
  纸质出版：2014-09
- Accepted：
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Yuan-ying Liang, Hu Tang, Gan-ji Zhong, 等. Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics[J]. Chinese Journal of Polymer Science, 2014,32(9):1176-1187.

Yuan-ying Liang, Hu Tang, Gan-ji Zhong, et al. Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics[J]. Chinese Journal of Polymer Science, 2014, 32(9): 1176-1187.
Yuan-ying Liang, Hu Tang, Gan-ji Zhong, 等. Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics[J]. Chinese Journal of Polymer Science, 2014,32(9):1176-1187. DOI： 10.1007/s10118-014-1505-y.

Yuan-ying Liang, Hu Tang, Gan-ji Zhong, et al. Formation of Poly(L-lactide) Mesophase and Its Chain Mobility Dependent Kinetics[J]. Chinese Journal of Polymer Science, 2014, 32(9): 1176-1187. DOI： 10.1007/s10118-014-1505-y.

摘要

Abstract

In the present work

the PLLA mesophase formation and its kinetics at the advent of a chain mobility accelerator (polyethylene glycol (PEG)) are investigated by wide angle X-ray diffraction (WAXD) and time-resolved Fourier transform infrared spectroscopy (FTIR). It is interestingly found that the presence of PEG could accelerate the formation of PLLA mesophase notably due to the enhanced chain mobility

giving rise to a substantially reduced half time (

0.5

) of PLLA mesophase formation from 129 min to 8 min. The Avrami exponents (

) for the kinetics of mesophase formation are ~0.5 for neat PLLA and 1 for PLLA/PEG

respectively

indicating that 1D-rod growth through heterogeneous nucleation occurs during formation of PLLA mesophase. Tensile testing demonstrates that PLLA mesophase could increase the tensile strength and modulus but decrease the elongation at break.

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