A Study on the Curing Behavior of Epoxy Resin Incorporating PEI as a Toughening Agent

In addition to being cost effective, epoxy resin has excellent mechanical, electrical, and chemical characteristics with minimal shrinkage during processing. Additionally, it produces negligible volatile substances during curing, therefore rendering it widely applicable in various industrial fields, for instance, composite materials. However, due to the densely crosslinked microstructure, it is brittle and has relatively poor resistance to crack initiation and propagation, which affects its durability. Hence, it is necessary to improve the toughness and the heat resistance of epoxy resin. To this end, a method of introducing super engineering plastic in the form of particles was investigated. In this study, polyetherimide (PEI), which has excellent thermal, mechanical, and chemical properties, was applied as a toughening agent to an epoxy resin, and the change in the curing behavior of the epoxy resin when the content of the PEI was changed was observed. In addition, to improve the dispersibility of the PEI particles in the epoxy resin, the toughening effect of the PEI was modified through amination.

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A Study on the Curing Behavior of Epoxy Resin Incorporating PEI as a Toughening Agent

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