环氧端羟基聚丁二烯增韧环氧树脂的研究

Study on Epoxy Resin Toughened by Epoxidized Hydroxy-Terminated Polybutadiene.

作者信息

Ge Zhen, Zhang Wenguo, Huang Chao, Luo Yunjun

机构信息

School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

出版信息

Materials (Basel). 2018 May 31;11(6):932. doi: 10.3390/ma11060932.

DOI:10.3390/ma11060932

PMID:29857534

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6025047/

Abstract

Epoxy resin (EP) was toughened by epoxidized hydroxy-terminated polybutadiene (EHTPB), with the corresponding modified epoxy resin being prepared. In this paper, the microstructure of EHTPB-modified epoxy resin was characterized, while the influence of different contents of EHTPB on curing kinetics, mechanical properties, morphology, thermal properties, dynamic thermomechanical (DMA) properties and crosslink density of the modified epoxy resin were also discussed. The results showed that the EHTPB-modified epoxy resin was successfully prepared and cured completely. The activation energy () of the modified epoxy resin decreased after the addition of EHTPB. With an increase in the EHTPB content, the tensile strength (σ) of the modified epoxy resin decreased and the breaking elongation (ε) increased gradually. The initial decomposition temperature (T) and glass transition temperature (T) of the modified epoxy resin decreased with an increase in the EHTPB content. The modified epoxy resin had a rough fractured surface and the interface was blurred, presenting a ductile fracture.

摘要

采用环氧端羟基聚丁二烯（EHTPB）对环氧树脂（EP）进行增韧，并制备了相应的改性环氧树脂。本文对EHTPB改性环氧树脂的微观结构进行了表征，同时讨论了不同含量的EHTPB对改性环氧树脂的固化动力学、力学性能、形态、热性能、动态热机械（DMA）性能和交联密度的影响。结果表明，成功制备了EHTPB改性环氧树脂且完全固化。添加EHTPB后，改性环氧树脂的活化能降低。随着EHTPB含量的增加，改性环氧树脂的拉伸强度（σ）降低，断裂伸长率（ε）逐渐增加。改性环氧树脂的初始分解温度（T）和玻璃化转变温度（T）随EHTPB含量的增加而降低。改性环氧树脂的断裂表面粗糙，界面模糊，呈现韧性断裂。