Effects of Composition on Microstructure and Crystallization Behavior for Impact Polypropylene Copolymer Investigated by Restructuring the Complex Core-Shell Dispersed Particles in Ternary Blends

Bi-wei Qiu; Feng Chen; Yong-gang Shangguan; Yu Lin; Qiang Zheng

doi:10.1007/s10118-015-1556-8

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Effects of Composition on Microstructure and Crystallization Behavior for Impact Polypropylene Copolymer Investigated by Restructuring the Complex Core-Shell Dispersed Particles in Ternary Blends

PAPER | Updated：2021-06-21

- Effects of Composition on Microstructure and Crystallization Behavior for Impact Polypropylene Copolymer Investigated by Restructuring the Complex Core-Shell Dispersed Particles in Ternary Blends
- Chinese Journal of Polymer Science Vol. 33, Issue 1, Pages: 95-108(2015)
- 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：
- DOI：10.1007/s10118-015-1556-8
  CLC：
- Received：03 April 2014，
  
  Revised：2014-05-29，
  
  Accepted：02 July 2014，
  
  Published：2015-01
- Accepted：
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Bi-wei Qiu, Feng Chen, Yong-gang Shangguan, et al. Effects of Composition on Microstructure and Crystallization Behavior for Impact Polypropylene Copolymer Investigated by Restructuring the Complex Core-Shell Dispersed Particles in Ternary Blends[J]. Chinese Journal of Polymer Science, 2015, 33(1): 95-108.
DOI：

Bi-wei Qiu, Feng Chen, Yong-gang Shangguan, et al. Effects of Composition on Microstructure and Crystallization Behavior for Impact Polypropylene Copolymer Investigated by Restructuring the Complex Core-Shell Dispersed Particles in Ternary Blends[J]. Chinese Journal of Polymer Science, 2015, 33(1): 95-108. DOI： 10.1007/s10118-015-1556-8.

摘要

Abstract

A series of ternary blends of polypropylene/ethylene-propylene random copolymer/ethylene-propylene segmented copolymer (HPP/EPR/E

P) whose microstructures are similar to those of impact polypropylene copolymer (IPC) were prepared in order to systematically investigate the effects of composition on microstructure and crystallization behavior of IPC. The observation of primary phase morphology reveals that the dispersed phase with core-shell structure could be rebuilt in certain composition and excessive EPR leads to a bicontinuous phase structure in ternary blends. After undergoing same quiescent crystallization including isothermal and non-isothermal crystallization

these blend samples exhibit special composition-dependent melting behavior

i.e.

the melting point increases markedly with the increase of EPR content until it turns down at a critical content (about 30 wt%). The crystallization behavior is mainly ascribed to the different nucleation abilities. It is suggested that although the compatibility between EPR and HPP components becomes worse with the increase of EPR content due to the increased interfacial area and the decreased concentration of E

higher EPR content in the blend facilitates to heterogeneous nucleation except for the appearance of obvious bicontinuous phase structure.

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