Effect of Post Curing Process on the Properties of Graphite/Epoxy Composites

摘要

THe objective of the study was to investigate the effect of post-cure on the moisture absorption and dynamic response of CFRP. The unidirectional materials were postcured in the range of 190-210 C for times up to 10 hrs. The dynamic response was measured by torsion pendulum technique and the interlaminar shear strength at room temperature and 120 C in short beam bending. The interlaminar shear strength and the glass transition temperature of the composite in wet condition was found to be governed by the amount of absorbed moisture. The different post-curing conditions did not cause a change in the mechanical behavior of the Fibredux 914C/T300 composite. The results are explained in terms of cross-linking density of the cured epoxy.