Issue 8, 2013
From the journal:

CrystEngComm

In-situsynchrotron SAXS and WAXS investigations on deformation and α–β transformation of uniaxial stretched poly(vinylidene fluoride)

Huilong Guo,a   Yao Zhang,a   Feifei Xue,a   Ziwei Cai,a   Yingrui Shang,a   Jingqing Li,a   Yu Chen,b   Zhonghua Wuc  and  Shichun Jiang*a  

* Corresponding authors

a School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China
E-mail: scjiang@tju.edu.cn

b Department of Chemistry, School of Sciences, Tianjin University, Tianjin 300072, P. R. China

c Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China

Abstract

The crystalline structure evolution of poly(vinylidene fluoride) (PVDF) during tensile deformation at 60 °C, 140 °C and 160 °C, i.e. between the glass transition temperature (Tg) and the melting temperature (Tm), was investigated by in-situ synchrotron SAXS and WAXS techniques. The analysis of the obtained scattering results indicated either yielding or α–β transformation in PVDF occurred and initiated at almost the same strain level with different stretching temperatures. A deformation mechanism was proposed for PVDF to illustrate the structure evolution during uniaxial stretching at high temperature indicating that the initial crystallite and crystalline lamellae structures of stretched PVDF are destroyed and orientated not simultaneously, which is intimately related to the yield point and the initial of α–β transformation on a certain degree of orientation. The long period along tensile direction increases to a maximum and then drops into a lower but stable value during this stage of deformation.

Graphical abstract: In-situ synchrotron SAXS and WAXS investigations on deformation and α–β transformation of uniaxial stretched poly(vinylidene fluoride)

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Article information

DOI
https://doi.org/10.1039/C2CE26578H
Article type
Paper
Submitted
28 Sep 2012
Accepted
28 Nov 2012
First published
29 Nov 2012

CrystEngComm, 2013,15, 1597-1606

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In-situ synchrotron SAXS and WAXS investigations on deformation and α–β transformation of uniaxial stretched poly(vinylidene fluoride)

H. Guo, Y. Zhang, F. Xue, Z. Cai, Y. Shang, J. Li, Y. Chen, Z. Wu and S. Jiang, CrystEngComm, 2013, 15, 1597 DOI: 10.1039/C2CE26578H

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