Study on the Properties of Aramid Fibre/Epoxy Composites

In this study,mechanical properties,three heat constants and microscopic fracture as well as compatibility with the insulator of the chinese aramid f iberⅢ/epoxy composites and F-12/epoxy composites were tested,compared and analyzed.Experimental results show that ? exural properties,compressive properties,shearing properties and transverse tenlile properties of the composites containing aramid f ibre Ⅲ are lower than those containing F-12 f ibre.However,longitudinal tensile strength of the former are 13.9 % higher than that of the latter.The two plates’shear-ing property between aramid composite and nitrile-butadiene rubber are slightly higher than that of between ara-mid composite and ethylene propylene diene monomer rubber.On the whole,the aramid fi bre composites seemed to exhibit good heat insulation property,but their longitudinal compressive and shearing properties were low.The fracture surface observed wnder SEM revealed the unique characteristic of faiture of the aramid composites by peeling of the fi bre skin and/or the fi bre being torn.