Properties of E-51/DDS Epoxy Resin Toughened by Alkaline EP_b-POSS

• Main Authors: WANG Ling-xia, MA Xiao-yan, JIN Long, CHEN Fang, WU Tao
• Format: Article
• Language: zho
• Published: Journal of Materials Engineering 2016-11-01
• Series: Journal of Materials Engineering
• Subjects: silsesquioxane; epoxy resin; toughness; thermal stability
• Online Access: http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.11.005
• ISSN: 1001-4381; 1001-4381

The bisphenol A epoxy resin (E-51)/4,4'-diaminodiphenyl sulfone (DDS) was modified by the epoxy silsesquioxane (EP_b-POSS), which was synthesized by hydrolytic condensation of (γ-glycidoxypropyl)trimethoxysilane under basic condition, to prepare EP_b-POSS/E-51/DDS modified resin systems. The curing process and the influence of EP_b-POSS with different contents on the mechanical properties and thermal stability of the modified resin systems was studied. The results show that although the EP_b-POSS have little effect on the curing process and the stiffness of the modified resin, it can significantly improve the toughness; when the mass fraction of EP_b-POSS is 1.0%, the impact strength of the modified resin can reach 49.2kJ·m², is increased by 90.0%, and shows obvious toughness fracture; the bending strength is 132.8MPa, is slightly increased; and the initial decomposition temperature is 378.0℃, is increased by 26.0℃.