The use of inhibited layers to improve mechanical properties of thermoset composite materials

摘要

The present paper discusses the research data on strength properties of polymer composite materials using fiberglass reinforced plastic(FRP)as an example.During the process of fiberglass reinforced plastic curing with the use of hot molding,a thermal gradient inevitably appears throughout the material thickness.This phenomenon results in uneven curing of prepreg layers.Internal stress consequently occurs in the material.It is proposed to control the kinetics of binder curing throughout the material thickness by introducing an inhibitor into the various prepreg layers.Multichannel dielectric analysis was used to study the curing kinetics of fiberglass reinforced plastic.It has been found that the time spread for gelation is 8.6 min in the 15-layer sample.The study of strength properties of the obtained samples demonstrates an increase in flexural strength of PCM-modified samples by 12.7%-17.7% and a reduction in their anisotropy.