Interphase study in cyanate/glass fibre composites using thermomechanical analysis and micro-thermal analysis

Fibre/matrix interphase has a dramatic influence on the composite performances. For the best understanding of interfacial phenomena, sizing has been characterized “in situ” by dynamic mechanical analysis, and sizing extract part, by different techniques. To know sizing impact on interphase nature and properties in the composite, four types of samples have been realized: three composites, which have been elaborated according to the technique of vacuum molding and differed by sizing state, and neat resin samples. The dynamic mechanical analysis (DMA) has allowed us to study both these composites and their interphases. Moreover, micro-thermal analysis has been a good technique for interphase investigation in our composites.