Size Distribution and Anisotropy of the Minor Phase Droplets in Polypropylene/Ethylene-Octene Copolymer Blends: Effects of Shear and Component Miscibility

Cheng-zhen Geng; Yan-ling Zhu; Guang-hui Yang; Qiang Fu; Chao-liang Zhang; Ke Wang; Tian-nan Zhou

doi:10.1007/s10118-014-1382-4

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Size Distribution and Anisotropy of the Minor Phase Droplets in Polypropylene/Ethylene-Octene Copolymer Blends: Effects of Shear and Component Miscibility

Updated：2021-06-21

- Size Distribution and Anisotropy of the Minor Phase Droplets in Polypropylene/Ethylene-Octene Copolymer Blends: Effects of Shear and Component Miscibility
- Chinese Journal of Polymer Science Vol. 32, Issue 1, Pages: 9-20(2014)
- Affiliations：
  
  a.College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
  b.State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
- Author bio：
  
  **Qiang Fu (傅强), E-mail: qiangfu@scu.edu.cn
- Funds：
- DOI：10.1007/s10118-014-1382-4
  CLC：
- Received：17 September 2013，
  
  Revised：2013-10-05，
  
  Accepted：09 October 2013，
  
  Published：2014-01
- Accepted：
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Cheng-zhen Geng, Yan-ling Zhu, Guang-hui Yang, et al. Size Distribution and Anisotropy of the Minor Phase Droplets in Polypropylene/Ethylene-Octene Copolymer Blends: Effects of Shear and Component Miscibility[J]. Chinese Journal of Polymer Science, 2014, 32(1): 9-20.
DOI：

Cheng-zhen Geng, Yan-ling Zhu, Guang-hui Yang, et al. Size Distribution and Anisotropy of the Minor Phase Droplets in Polypropylene/Ethylene-Octene Copolymer Blends: Effects of Shear and Component Miscibility[J]. Chinese Journal of Polymer Science, 2014, 32(1): 9-20. DOI： 10.1007/s10118-014-1382-4.

摘要

Abstract

In this work

polypropylene (PP)/octene-ethylene copolymer (POE) blends were injection-molded using the so-called dynamic packing injection technique

which imposed oscillatory shear on the gradually cooling melt during the packing solidification stage. In this way

the effect of shear on the size distribution and anisotropy of the minor phase droplets could be investigated. Besides

by using two kinds of POE with different octene contents

the effect of component miscibility was also studied. The results show that the droplet size is mainly determined by composition and miscibility

and droplet anisotropy is mainly determined by droplet size and shear. Most importantly

under the same processing condition

droplet anisotropy increases with droplet size

and there seems a linear fit between them

disregarding the miscibility factor. These results may provide guidance for preparing polymer blends with desired properties by tailoring their phase morphologies.

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