Effect of Applied Stress, Thermal Environment and Water in Epoxy Resins.
Final scientific rept. 1 Jun 77-30 Nov 80,
NAPLES UNIV (ITALY) DEPT OF CHEMICAL ENGINEERING
Pagination or Media Count:
A series of absorption experiments on Epikote 828 resin have been conducted to provide a qualitative understanding of the mechanisms associated with moisture uptake by composite matrix materials, and to assess the effects of the hygrothermal and stress environments. Absorption kinetics and apparent equilibrium moisture concentrations have been determined by immersing samples in constant temperature baths, and periodically removing them for weighing on a quartz helical spring microbalance, until no change in weight could be detected. Two sample types differing in the length of postcuring 3 and 6 days respectively have been tested to determine the effect of curing on moisture absorption.