Structural and Rheological Properties of PP/EPR/PE Alloys

Jia-Qi Zhang; Yan-Jie Zhang; Chun-Yu Zhang; Quan Chen

doi:10.1007/s10118-022-2849-3

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Structural and Rheological Properties of PP/EPR/PE Alloys

RESEARCH ARTICLE | Updated：2023-01-06

- Structural and Rheological Properties of PP/EPR/PE Alloys
- Structural and Rheological Properties of PP/EPR/PE Alloys
- 高分子科学（英文版） 2023年41卷第2期页码：240-249
- Affiliations：
  
  a.State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  b.University of Science and Technology of China, Hefei 230026, China
  c.School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
- Author bio：
  
  cyzhang@qust.edu.cn (C.Y.Z.)
  qchen@ciac.ac.cn (Q.C.)
- Funds：
  
  Q.C. and J.Z. acknowledge the National Natural Science Foundation of China (No. 21790343).
- DOI：10.1007/s10118-022-2849-3
  中图分类号：
- 收稿：2022-06-06，
  
  修回：2022-7-19，
  
  录用：2022-7-22，
  
  网络首发：2022-09-22，
  
  纸质出版：2023-02-01
- Accepted：
Scan QR Code
Zhang, J. Q.; Zhang, Y. J.; Zhang, C. Y.; Chen, Q. Structural and rheological properties of PP/EPR/PE alloys. Chinese J. Polym. Sci. 2023, 41, 240–249

Jia-Qi Zhang, Yan-Jie Zhang, Chun-Yu Zhang, et al. Structural and Rheological Properties of PP/EPR/PE Alloys[J]. Chinese Journal of Polymer Science, 2023, 41(2): 240-249.
Zhang, J. Q.; Zhang, Y. J.; Zhang, C. Y.; Chen, Q. Structural and rheological properties of PP/EPR/PE alloys. Chinese J. Polym. Sci. 2023, 41, 240–249 DOI： 10.1007/s10118-022-2849-3.

Jia-Qi Zhang, Yan-Jie Zhang, Chun-Yu Zhang, et al. Structural and Rheological Properties of PP/EPR/PE Alloys[J]. Chinese Journal of Polymer Science, 2023, 41(2): 240-249. DOI： 10.1007/s10118-022-2849-3.

摘要

In this study

we found that either the linear viscoelasticity or the non-linear damping behavior of PP alloys was controlled by two relaxation processes

i.e.

the fast relaxation process of PP chains and the slow relaxation process of the EPR/PE-rich domains.

Abstract

Linear and non-linear rheological properties were examined for in-reactor alloy samples composed of isotactic polypropylene (

PP)

ethylene-propylene rubber (EPR)

and polyethylene (PE). The samples were prepared through two- or three-stage sequential polymerization

where

as the majority

was synthesized in the first stage

and either EPR or PE

as the minority

was synthesized in the second or third stage. Above

of both PE and

the linear viscoelasticity shows two relaxation processes

where the fast and slow processes are attributable to the relaxation of the

PP component and that of the EPR/PE domains

respectively. Both the damping behavior upon applying the step-strain measurements and the shear-thinning behavior under the shear-rate sweep measurements are strongly related to the different degrees of non-linearity of the two relaxation processes.

关键词

Keywords

references

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