Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion

Feng Chen; Bi-wei Qiu; Ya-nan Ye; Yu-hua Lv; Yong-gang Shangguan; Yi-hu Song; Qiang Zheng

doi:10.1007/s10118-015-1616-0

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Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion

PAPER | Updated：2021-06-21

- Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion
- Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion
- Chinese Journal of Polymer Science 2015年33卷第4期页码：633-645
- Affiliations：
  
  MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  **Yong-gang Shangguan (上官勇刚), E-mail: shangguan@zju.edu.cn
  Qiang Zheng (郑强), E-mail: zhengqiang@zju.edu.cn
- Funds：
  
  National Natural Science Foundation of China(51173157;51173165);Fundamental Research Funds for the Central Universities(2013QNA4048)
- DOI：10.1007/s10118-015-1616-0
  中图分类号：
- 收稿：2014-08-12，
  
  修回：2014-09-12，
  
  录用：2015-01-05，
  
  纸质出版：2015-04
- Accepted：
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Feng Chen, Bi-wei Qiu, Ya-nan Ye, 等. Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion[J]. Chinese Journal of Polymer Science, 2015,33(4):633-645.

Feng Chen, Bi-wei Qiu, Ya-nan Ye, et al. Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion[J]. Chinese Journal of Polymer Science, 2015, 33(4): 633-645.
Feng Chen, Bi-wei Qiu, Ya-nan Ye, 等. Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion[J]. Chinese Journal of Polymer Science, 2015,33(4):633-645. DOI： 10.1007/s10118-015-1616-0.

Feng Chen, Bi-wei Qiu, Ya-nan Ye, et al. Reconstruction of Core-Shell Dispersed Particles in Impact Polypropylene Copolymer during Extrusion[J]. Chinese Journal of Polymer Science, 2015, 33(4): 633-645. DOI： 10.1007/s10118-015-1616-0.

摘要

Abstract

We reported an approach to reconstruct the complex phase morphology of impact polypropylene copolymer (IPC) with core-shell dispersed particles and to optimize its toughness in approximate shear condition. The molten-state annealing results indicate that the phase structure with core-shell dispersed particles is unstable and could be completely destroyed by static annealing

resulting in the degradation of impact strength. By using a co-rotating twin screw extruder

we found that the dispersed particle with core-shell structure could be rebuilt in appropriate condition with the recovery of excellent impact strength due to both the huge interfacial tension during solidification and the great difference in viscosity of components. Results reveal that almost all the extruded IPCs show the impact strength 60%-90% higher than that of annealed IPCs at room temperature. And the twice-extruded IPC shows the highest impact strength

446% higher than that of IPC annealed for 30 min. As for low temperature tests

the impact strength of extruded IPCs also increases by 33%-58%. According to adjusting the processing conditions including extrusion speed

extrusion frequency and temperature

an optimization of toughness was well established.

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