Synergistic toughening of epoxy modified by graphene and block copolymer

Abstract

Embodiments are directed to compositions comprising (i) amphiphilic block copolymer; (ii) resin material; and amine modified graphene oxide; where the composition shows a synergic effect in critical strain energy release rate (Glc) value versus predicted value calculated by adding (i) the Glc value for neat resin material, plus (ii) the difference in Glc found when adding the amphiphilic block copolymer to the resin material versus the neat resin material, plus (iii) the difference in Glc found when adding the amine modified graphene oxide to the resin material versus the neat resin material.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority to US Provisional Application Serial No. 62 / 383,652, filed September 6, 2016, which is incorporated by reference as if fully set forth herein. [0003] government rights [0004] The subject matter disclosed herein was made with government support under Grant No. 1420013 awarded by the National Science Foundation. The government has certain rights in the subject matter disclosed herein. technical field [0005] The present disclosure relates to epoxy resins with improved toughness. Background technique [0006] Glassy thermosets such as epoxies are brittle and lack the mechanical toughness required for many applications. Traditional toughening strategies for epoxy thermosets can be broadly classified into two categories: modification with flexible additives (including liquid rubber and amphiphilic block copolymers); modification with rigid fillers such as silica partic...

AI Technical Summary

Problems solved by technology

[0008] In rigid filler toughened epoxies, the preferred loading level is typically 1 wt% to 5 wt% for the desired toughness enhancement, however, this severely limits the processability of the formulation

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