基于MD模拟的DGEBA平均分子量对环氧树脂热机械性能的影响

ZHAO Yunxiao; ZHAO Shutao; XIE Qing; ZHAO Yushun; WANG Feipeng; HAO Liucheng

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基于MD模拟的DGEBA平均分子量对环氧树脂热机械性能的影响

更新时间：2025-12-08

- 基于MD模拟的DGEBA平均分子量对环氧树脂热机械性能的影响
- Vol. 45, Issue 9, Pages: 2766-2773(2019)
- 作者机构：
  
  1. 华北电力大学新能源电力系统国家重点实验室
  2. 合肥工业大学电气与自动化工程学院
  3. 重庆大学输配电装备及系统安全与新技术国家重点实验室
  4. 平高集团有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：30 September 2019，
  
  Published：2019
- 稿件说明：
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ZHAO Yunxiao, ZHAO Shutao, XIE Qing, et al. 基于MD模拟的DGEBA平均分子量对环氧树脂热机械性能的影响[J]. 2019, 45(9): 2766-2773.
DOI：

ZHAO Yunxiao, ZHAO Shutao, XIE Qing, et al. 基于MD模拟的DGEBA平均分子量对环氧树脂热机械性能的影响[J]. 2019, 45(9): 2766-2773. DOI：

摘要

平均分子量的大小对双酚A型环氧树脂性能有着显著影响

为此采用分子动力学模拟（MD）方法

将2种不同聚合度的双酚A型缩水甘油醚（DGEBA）按照不同比例混合

以甲基四氢苯酐（MTHPA）为固化剂

研究了不同平均分子量对环氧树脂体系热力学性能的影响

并与聚合度为0的DGEBA/MTHPA体系进行了对比。结果表明:随着平均分子量的增加

体系的玻璃化转变温度（Tg）先升高后降低

但均高于聚合度为0的DGEBA/MTHPA体系;平均分子量对橡胶态体系的热膨胀系数（CTE）影响较为明显;体系的弹性模量呈现先上升后下降的趋势

在平均分子量为700～750时

各个弹性模量的提升幅度最大。

Abstract

The average molecular weight of bisphenol A-type epoxy resin has a significant effect on its performance. Consequently

two different degrees of polymerization of bisphenol A-type glycidyl ether（DGEBA） were mixed in different proportions by molecular dynamics simulation（MD）. The effects of different average molecular weights on the thermodynamic properties of epoxy resin system were studied using methyltetrahydrophthalic anhydride（MTHPA） as a curing agent

and compared with those of DGEBA/MTHPA system with polymerization degree of 0. The results show that

with the increase of average molecular weight

the glass transition temperature（Tg） of the system increases first and then decreases

but both are higher than those of the DGEBA/MTHPA system with a degree of polymerization of 0. The average molecular weight more remarkably affects the thermal expansion coefficient（CTE） of the rubber system. The elastic modulus of the system first rises and then decreases. When the average molecular weight is 700～750

the elastic modulus increases to the most extent.

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