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Model diglycidyl ether of bisphenol-A based epoxy resins containing well-dispersed 15nm block copolymer (BCP) nanoparticles were prepared to study the effect of matrix crosslink density on their fracture behavior. The crosslink density of the model epoxies was varied via the controlled epoxy thermoset technology and estimated experimentally. As expected, it was found that the fracture toughness of...
A bisphenol A-based epoxy was modified with an amphiphilic poly(ethylene-alt-propylene)–b-poly(ethylene oxide) (PEP–PEO) block copolymer as a toughening agent. PEP–PEO molecules self-assemble into spherical micelles in epoxy with an average diameter of 15nm and give rise to 180% improvement in fracture resistance. The fracture and tensile behaviors of the PEP–PEO-modified epoxy were investigated at...
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