Effect of the toughening agent and coupling agent on the Liquid Epoxy Molding Compound

With the development of electronic products towards high-density integration, high performance, and multi-function, Liquid Epoxy Molding Compound (LMC) puts forward higher requirements for its adhesion performance. Mousavi’s
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experiment has long found that: When the amount of toughening agent added to the core-shell structure is 5% (mass fraction), the impact resistance of epoxy resin is improved by nearly 200%. For epoxy resin with low Tg, the addition of toughening agent to the core-shell structure will not reduce the Tg and stiffness of epoxy resin. This paper investigated the influence of different toughening and coupling agents on the adhesion properties of products. Experimental studies have shown that toughening agent and coupling agent C can improve the adhesion properties of products. The toughening agent helps to improve the crosslinking density of resin and filler, to achieve greater adhesion. This result from toughening agents can effectively improve the mechanical properties of products and help disperse mixing. In addition, coupling agent C has a relatively stable cyclohexane structure compared with A and B, so it can better improve the interface bonding between filler and resin.