Advantage of Preserving Bi-orientation Structure of Isotactic Polypropylene through Die Drawing

Dong Lyu; Ying-Ying Sun; Yu-Qing Lai; Glen Thompson; Philip Caton-Rose; Phil Coates; Ying Lu; Yong-Feng Men

doi:10.1007/s10118-020-2465-z

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Advantage of Preserving Bi-orientation Structure of Isotactic Polypropylene through Die Drawing

ARTICLE | Updated：2020-08-17

- Advantage of Preserving Bi-orientation Structure of Isotactic Polypropylene through Die Drawing
- Chinese Journal of Polymer Science Vol. 39, Issue 1, Pages: 91-101(2021)
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.University of Science and Technology of China, School of Applied Chemistry and Engineering, Hefei 230026, China
  c.ExxonMobil Asia Paciﬁc Research & Development Co., Ltd., Shanghai 200241, China
  d.Polymer Interdisciplinary Research Centre, University of Bradford, Bradford BD7 1DP, UK
- Author bio：
  
  luying@ciac.ac.cn (Y.L.)
  men@ciac.ac.cn (Y.F.M.)
- Funds：
- DOI：10.1007/s10118-020-2465-z
  CLC：
- Received：10 April 2020，
  
  Revised：2020-6-2，
  
  Accepted：04 June 2020，
  
  Online First：17 August 2020，
  
  Published：01 January 2021
- Accepted：
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Lyu, D.; Sun, Y. Y.; Lai, Y. Q.; Thompson, G.; Caton-Rose, P.; Coates, P.; Lu, Y.; Men, Y. F. Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing. Chinese J. Polym. Sci. 2021, 39, 91–101

Dong Lyu, Ying-Ying Sun, Yu-Qing Lai, et al. Advantage of Preserving Bi-orientation Structure of Isotactic Polypropylene through Die Drawing[J]. Chinese Journal of Polymer Science, 2021, 39(1): 91-101.
Lyu, D.; Sun, Y. Y.; Lai, Y. Q.; Thompson, G.; Caton-Rose, P.; Coates, P.; Lu, Y.; Men, Y. F. Advantage of preserving bi-orientation structure of isotactic polypropylene through die drawing. Chinese J. Polym. Sci. 2021, 39, 91–101 DOI： 10.1007/s10118-020-2465-z.

Dong Lyu, Ying-Ying Sun, Yu-Qing Lai, et al. Advantage of Preserving Bi-orientation Structure of Isotactic Polypropylene through Die Drawing[J]. Chinese Journal of Polymer Science, 2021, 39(1): 91-101. DOI： 10.1007/s10118-020-2465-z.

摘要

Abstract

The isotactic polypropylene (

PP) usually shows a unique parent-daughter lamellae structure in which the parent and daughter lamellae are against each other with a near perpendicular angle (80° or 100°). Inducing a high fraction of oriented cross-hatched structure in

PP during processing is desirable for designing the bi-oriented

PP products. We processed a commercial

via

tensile-stretching and die-drawing to evaluate the structural evolution of oriented parent-daughter lamellae. It turned out that the die-drawing process had an advantage in attaining a high fraction of oriented cross-hatched structure of

as compared to the free tensile stretching. Besides

the presence of

-nucleating agents affected the formation of oriented parent-daughter lamellae in the die-drawn samples whereas such influence diminished in the free stretched ones. It was found that the confined deformation inside the die led to the well-preserved oriented cross-hatched structure in the die-drawn

PP.

关键词

Keywords

references

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