Comparison of the Structural Evolution of <italic style="font-style: italic">β</italic> Polypropylene during the Sequential and Simultaneous Biaxial Stretching Process

Dao-Xin Zhang; Lei Ding; Feng Yang; Fang Lan; Ya Cao; Ming Xiang

doi:10.1007/s10118-021-2534-y

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Comparison of the Structural Evolution of β Polypropylene during the Sequential and Simultaneous Biaxial Stretching Process

ARTICLE | Updated：2021-01-06

- Comparison of the Structural Evolution of β Polypropylene during the Sequential and Simultaneous Biaxial Stretching Process
- Chinese Journal of Polymer Science Vol. 39, Issue 5, Pages: 620-631(2021)
- Affiliations：
  
  State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
- Author bio：
  
  yangfengscu@126.com
- Funds：
- DOI：10.1007/s10118-021-2534-y
  CLC：
- Received：14 October 2020，
  
  Revised：2020-11-10，
  
  Accepted：29 November 2020，
  
  Online First：06 January 2021，
  
  Published：01 January 2021
- Accepted：
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Zhang, D. X.; Ding, L.; Yang, F.; Lan, F.; Cao, Y.; Xiang, M. Comparison of the structural evolution of , β, polypropylene during the sequential and simultaneous biaxial stretching process. Chinese J. Polym. Sci. 2021, 39, 620–631

Dao-Xin Zhang, Lei Ding, Feng Yang, et al. Comparison of the Structural Evolution of β Polypropylene during the Sequential and Simultaneous Biaxial Stretching Process[J]. Chinese Journal of Polymer Science, 2021, 39(5): 620-631. DOI: 10.1007/s10118-021-2534-y.
Zhang, D. X.; Ding, L.; Yang, F.; Lan, F.; Cao, Y.; Xiang, M. Comparison of the structural evolution of , β, polypropylene during the sequential and simultaneous biaxial stretching process. Chinese J. Polym. Sci. 2021, 39, 620–631 DOI： 10.1007/s10118-021-2534-y.

Dao-Xin Zhang, Lei Ding, Feng Yang, et al. Comparison of the Structural Evolution of β Polypropylene during the Sequential and Simultaneous Biaxial Stretching Process[J]. Chinese Journal of Polymer Science, 2021, 39(5): 620-631. DOI: 10.1007/s10118-021-2534-y. DOI：

摘要

Abstract

In this work

the lamellar structural evolution and microvoids variations of

polypropylene (

-PP) during the processing of two different stretching methods

sequential biaxial stretching and simultaneous biaxial stretching

were investigated in detail. It was found that different stretching methods led to significantly different lamellae deformation modes

and the microporous membranes obtained from the simultaneous biaxial stretching exhibited better mechanical properties. For the sequential biaxial stretching

abundant coarse fibers originated from the tight accumulation of the lamellae parallel to the longitudinal stretching direction

whereas the lamellae perpendicular to the stretching direction were easily deformed and separated. Those coarse fibers were difficult to be separated to form micropores during the subsequent transverse stretching process

resulting in a poor micropores distribution. However

for the simultaneous biaxial stretching

the

crystal had the same deformation mode

that is

the lamellae distributed in different directions were all destroyed

forming abundant microvoids and little coarse fibers.

关键词

Keywords

references

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⁰

Comparison of the Structural Evolution of β Polypropylene during the Sequential and Simultaneous Biaxial Stretching Process

DOI：10.1007/s10118-021-2534-y

摘要

Abstract

关键词

Keywords

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