Temperature-dependent <italic style="font-style: italic">β</italic>-Crystal Growth in Isotactic Polypropylene with <italic style="font-style: italic">β</italic>-Nucleating Agent after Shear Flow

Yan-hui Chen; Hao-qing Yang; Song Yang; Qiu-yu Zhang; Zhong-ming Li

doi:10.1007/s10118-017-1990-x

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Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow

Papers | Updated：2021-02-18

- Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow
- Chinese Journal of Polymer Science Vol. 35, Issue 12, Pages: 1540-1551(2017)
- Affiliations：
  
  a.Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an 710072, China
  b.College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
- Author bio：
  
  Yan-hui Chen (陈妍慧), E-mail:yanhuichen@nwpu.edu.cn
- Funds：
- DOI：10.1007/s10118-017-1990-x
  CLC：
- Received：06 April 2017，
  
  Revised：2017-05-15，
  
  Accepted：02 June 2017，
  
  Published：05 December 2017
- Accepted：
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Yan-hui Chen, Hao-qing Yang, Song Yang, et al. Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow[J]. Chinese Journal of Polymer Science, 2017, 35(12): 1540-1551. DOI: 10.1007/s10118-017-1990-x.
DOI：

Yan-hui Chen, Hao-qing Yang, Song Yang, et al. Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow[J]. Chinese Journal of Polymer Science, 2017, 35(12): 1540-1551. DOI: 10.1007/s10118-017-1990-x. DOI：

摘要

Abstract

In our current work

the effect of the shear temperature on the growth of

-crystal in isotactic polypropylene (

PP) with

-nucleating agent is investigated by means of

in situ

two-dimensional wide-angle X-ray diffraction (2D-WAXD). At low shear temperatures

the formed shear-induced oriented precursors are hard to relax back to random coiled state due to the weak mobility of molecular chains. Therefore

plenty of oriented

-crystals are induced by shear-induced oriented precursors

while

-crystal is greatly depressed. As the shear temperature increases

oriented

-crystal gradually increases along with the decrease of

-crystal. It is deduced that the shear temperature at which the content of

-crystal increases to the (maximum) value found in quiescent crystallization is almost the same as that at which the accelerating effect of flow on crystallization kinetics is completely erased. Our work manifests its significance in regulating

-crystal and thus in the structure and property manipulation of

PP.

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⁰

Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow

DOI：10.1007/s10118-017-1990-x

摘要

Abstract

关键词

Keywords

references