Abstract
AbstractA model composite is used to simulate the interphase between an allylamine/1,7‐octadiene plasma copolymer‐coated fiber and an epoxy resin. Time‐of‐flight secondary‐ion mass spectrometry (ToF‐SIMS) is used to identify the structure of the interacting polymers and the locus of failure. The crack propagates near to one of the glass surfaces where a bonded semi‐interpenetrating network forms. The effect of functionality of the plasma copolymer coating (or size) and its thickness on interfacial stress transfer efficiency (STE) at a fiber‐break is studied using the fragmentation test. The cumulative stress transfer function and associated STE is able to differentiate between the improvement with increasing amine group concentration and decreasing thickness of the plasma polymer.magnified image
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