Toughening mechanisms in thermoplastic-modified epoxies: 1. Modification using poly(phenylene oxide)
作者： Raymond A Pearson , Albert F Yee
DOI: 10.1016/0032-3861(93)90051-B
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摘要: An epoxy based on the diglycidyl ether of bisphenol A (DGEBA) has been modified with poly(phenylene oxide) (PPO) and cured piperidine. two-phase alloy resulted, in which DGEBA was continuous phase. Several PPO loadings were investigated. The tensile yield strengths these PPO-modified epoxies found to be independent content. In contrast, fracture toughness improved content a linear fashion. micromechanical mechanism responsible for improvement consist crack bifurcation microcracking. Some evidence particle bridging also observed, it is thought that may play an important role formation microcracked damage zone.
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