Origin of Modulus Improvement for Epoxide-terminated Hyperbranched Poly(ether sulphone)/DGEBA/TETA Systems

Xue-Pei Miao; Dao-Jian Cheng; Ya-Dong Dai; Yan Meng; Xiao-Yu Li

doi:10.1007/s10118-018-2114-y

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Origin of Modulus Improvement for Epoxide-terminated Hyperbranched Poly(ether sulphone)/DGEBA/TETA Systems

ARTICLE | Updated：2021-02-18

- Origin of Modulus Improvement for Epoxide-terminated Hyperbranched Poly(ether sulphone)/DGEBA/TETA Systems
- Chinese Journal of Polymer Science Vol. 36, Issue 8, Pages: 991-998(2018)
- Affiliations：
  
  a.Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  b.State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  c.NeoTrident Technology Ltd (Beijing), Beijing 100190, China
- Author bio：
  
  miaoxp@mail.buct.edu.cn (X.P.M)
  chengdj@mail.buct.edu.cn (D.J.C)
  lixy@mail.buct.edu.cn (X.Y.L.)
- Funds：
- DOI：10.1007/s10118-018-2114-y
  CLC：
- Received：17 November 2017，
  
  Accepted：26 January 2018，
  
  Online First：13 April 2018，
  
  Published：2018-08
- Accepted：
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Xue-Pei Miao, Dao-Jian Cheng, Ya-Dong Dai, et al. Origin of Modulus Improvement for Epoxide-terminated Hyperbranched Poly(ether sulphone)/DGEBA/TETA Systems[J]. Chinese Journal of Polymer Science, 2018, 36(8): 991-998.
DOI：

Xue-Pei Miao, Dao-Jian Cheng, Ya-Dong Dai, et al. Origin of Modulus Improvement for Epoxide-terminated Hyperbranched Poly(ether sulphone)/DGEBA/TETA Systems[J]. Chinese Journal of Polymer Science, 2018, 36(8): 991-998. DOI： 10.1007/s10118-018-2114-y.

摘要

Abstract

It has been experimentally shown that epoxide-terminated hyperbranched polyether sulphone (EHBPES) can significantly improve the mechanical properties of traditional diglycidyl ether of bisphenol A/triethylenetetramine (DGEBA/TETA) systems

but the origin of the improvement is still unclear. In this work

we used molecular dynamics (MD) simulations to gain a thorough understanding of the origin of modulus improvement for EHBPES/DGEBA/TETA systems. It is found that the modulus of EHBPES/DGEBA/TETA systems increases with the increase of EHBPES loading. In addition

the crosslinking density

cohesive energy density (CED)

and free volume can be used to understand the modulus for EHBPES/DGEBA/TETA systems. It is shown that the highest modulus is achieved at 7 wt% EHBPES loading due to the highest crosslinking density and CED. When EHBPES loading is below 7 wt%

the higher CED and crosslinking density are responsible for the higher modulus. At higher loadings (> 7 wt%)

the decreased modulus is closely related to the decreased crosslinking density and increased fractional free volume. It is expected that our results could be of great implications for designing high-performance epoxy materials.

关键词

Keywords

references

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