Deformation Temperature and Lamellar Thickness Dependency of Form Ⅰ to Form Ⅲ Phase Transition in Syndiotactic Polypropylene during Tensile Stretching

Ying Lu; Ying-ying Sun; Ran Chen; Xiu-hong Li; Yong-feng Men

doi:10.1007/s10118-014-1494-x

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Deformation Temperature and Lamellar Thickness Dependency of Form Ⅰ to Form Ⅲ Phase Transition in Syndiotactic Polypropylene during Tensile Stretching

Updated：2021-06-21

- Deformation Temperature and Lamellar Thickness Dependency of Form Ⅰ to Form Ⅲ Phase Transition in Syndiotactic Polypropylene during Tensile Stretching
- Deformation Temperature and Lamellar Thickness Dependency of Form I to Form III Phase Transition in Syndiotactic Polypropylene during Tensile Stretching
- Chinese Journal of Polymer Science 2014年32卷第9期页码：1210-1217
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Changchun 130022, China
  b.SSRF, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
- Author bio：
  
  **Yong-feng Men (门永锋), E-mail: men@ciac.ac.cn
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China(21134006)
- DOI：10.1007/s10118-014-1494-x
  中图分类号：
- 收稿：2014-03-26，
  
  修回：2014-04-17，
  
  录用：2014-04-21，
  
  纸质出版：2014-09
- Accepted：
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Ying Lu, Ying-ying Sun, Ran Chen, 等. Deformation Temperature and Lamellar Thickness Dependency of Form Ⅰ to Form Ⅲ Phase Transition in Syndiotactic Polypropylene during Tensile Stretching[J]. Chinese Journal of Polymer Science, 2014,32(9):1210-1217.

Ying Lu, Ying-ying Sun, Ran Chen, et al. Deformation Temperature and Lamellar Thickness Dependency of Form I to Form III Phase Transition in Syndiotactic Polypropylene during Tensile Stretching[J]. Chinese Journal of Polymer Science, 2014, 32(9): 1210-1217.
Ying Lu, Ying-ying Sun, Ran Chen, 等. Deformation Temperature and Lamellar Thickness Dependency of Form Ⅰ to Form Ⅲ Phase Transition in Syndiotactic Polypropylene during Tensile Stretching[J]. Chinese Journal of Polymer Science, 2014,32(9):1210-1217. DOI： 10.1007/s10118-014-1494-x.

Ying Lu, Ying-ying Sun, Ran Chen, et al. Deformation Temperature and Lamellar Thickness Dependency of Form I to Form III Phase Transition in Syndiotactic Polypropylene during Tensile Stretching[J]. Chinese Journal of Polymer Science, 2014, 32(9): 1210-1217. DOI： 10.1007/s10118-014-1494-x.

摘要

Abstract

Phase transition from form I to form III in syndiotactic polypropylene crystallized at different conditions during tensile deformation at different temperatures was investigated by using

in situ

synchrotron wide angle X-ray diffraction technique. In all cases

the occurrence of this phase transition was observed. The onset strain of this transition was found to be crystalline thickness decided by crystallization temperature and drawing temperature dependent. The effect of drawing temperature on this phase transition is understood by the changes in mechanical properties with temperature. Moreover

crystalline thickness dependency of the phase transition reveals that this form I to from III phase transition occurs first in those lamellae with their normal along the stretching direction which have not experienced stress induced melting and recrystallization.

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