Study on Phase Transformation Behavior of Strain-induced PLLA Mesophase by Polarized Infrared Spectroscopy

Jian Hu; Li-Li Han; Tong-Ping Zhang; Yong-Xin Duan; Jian-Ming Zhang

doi:10.1007/s10118-019-2184-5

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Study on Phase Transformation Behavior of Strain-induced PLLA Mesophase by Polarized Infrared Spectroscopy

ARTICLE | Updated：2021-02-18

- Study on Phase Transformation Behavior of Strain-induced PLLA Mesophase by Polarized Infrared Spectroscopy
- Study on Phase Transformation Behavior of Strain-induced PLLA Mesophase by Polarized Infrared Spectroscopy
- Chinese Journal of Polymer Science 2019年37卷第3期页码：253-257
- Affiliations：
  
  Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China
- Author bio：
  
  zjm@qust.edu.cn
- Funds：
  
  The financial supports from the National Natural Science Foundation of China (Nos. 21774068 and 21704053) and Natural Science Foundation of Shandong Province (No. ZR2017BB069) are greatly appreciated.
- DOI：10.1007/s10118-019-2184-5
  中图分类号：
- 收稿：2018-07-19，
  
  修回：2018-8-22，
  
  录用：2018-8-28，
  
  网络首发：2018-09-25，
  
  纸质出版：2019-03
- Accepted：
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Citation: Hu, J.; Han, L. L.; Zhang, T. P.; Duan, Y. X.; Zhang, J. M. Study on phase transformation behavior of strain-induced PLLA mesophase by polarized infrared spectroscopy. Chinese J. Polym. Sci. 2019, 37, 253–257

Jian Hu, Li-Li Han, Tong-Ping Zhang, et al. Study on Phase Transformation Behavior of Strain-induced PLLA Mesophase by Polarized Infrared Spectroscopy[J]. Chinese Journal of Polymer Science, 2019, 37(3): 253-257.
Citation: Hu, J.; Han, L. L.; Zhang, T. P.; Duan, Y. X.; Zhang, J. M. Study on phase transformation behavior of strain-induced PLLA mesophase by polarized infrared spectroscopy. Chinese J. Polym. Sci. 2019, 37, 253–257 DOI： 10.1007/s10118-019-2184-5.

Jian Hu, Li-Li Han, Tong-Ping Zhang, et al. Study on Phase Transformation Behavior of Strain-induced PLLA Mesophase by Polarized Infrared Spectroscopy[J]. Chinese Journal of Polymer Science, 2019, 37(3): 253-257. DOI： 10.1007/s10118-019-2184-5.

摘要

Abstract

The structural transformation of mesophase to crystalline phase of strain-induced poly(L-lactic acid) has been investigated by differential scanning calorimetry (DSC) and

in situ

temperature dependent polarized Fourier transform infrared (FTIR) spectroscopy. It is found that

as the drawing temperature increases

melting of strain-induced mesophase in the heating process can remarkably interfere the crystallization behavior subsequently. Coupling with

in situ

polarized FTIR

from 60 °C to 76 °C

the mesophase melts partially rather than completely melting

and changes immediately to three-dimensional ordered structure. Of particular note

through monitoring the subtle spectral change in the critical phase transformation temperature from 60 °C to 64 °C

it is clearly demonstrated that relaxation of oriented amorphous chains initially takes place prior to the melting of mesophase.

关键词

Keywords

references

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