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
- Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow
- 高分子科学（英文版） 2017年35卷第12期页码：1540-1551
- 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：
  
  the National Natural Science Foundation of China(51473135);the National Natural Science Foundation of China(51503170);the National Natural Science Foundation of China(21676217);the Opening State Key Laboratory of Polymer Materials Engineering (Sichuan University)(sklpme 2015-4-22);the Fundamental Research Funds for the Central Universities(3102016BJY01)
- DOI：10.1007/s10118-017-1990-x
  中图分类号：
- 收稿：2017-04-06，
  
  修回：2017-05-15，
  
  录用：2017-06-02，
  
  纸质出版：2017-12-05
- Accepted：
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Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow[J]. 高分子科学（英文版）, 2017,35(12):1540-1551. DOI: 10.1007/s10118-017-1990-x.

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.
Temperature-dependent β-Crystal Growth in Isotactic Polypropylene with β-Nucleating Agent after Shear Flow[J]. 高分子科学（英文版）, 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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references

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

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