| Abstract: | Different interphases have been created with different film formers and coupling agents on glass and carbon single filaments embedded in thermoplastic and thermosetting matrices. Three micromechanical procedures (pull‐out test, fragmentation test and a version of microbond test in which crack propagation was continuously monitored by optical microscopy) were used to measure fiber/matrix interfacial bond strengh. The effect of interphase microstructure, transcrystallinity as well as matrix molecular weight on the measured bond strength, failure mode, and local properties of the interphase was examined. The possibilities of controlling bond strength between fiber surface and polymer matrix are discussed. |
