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The effect of polymethylmethacrylate, PMMA, molecular weight on the interfacial morphology in E-glass fibers reinforced epoxy-PMMA matrices has been studied. Four PMMA materials with different molecular weights (34000, 65000, 76000 and 360000 g/mol) were selected. Discrete PMMA rich domains dispersed in a continuous epoxy rich phase were obtained after phase separation in all the samples except when...
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