EFFECT OF THERMAL CYCLING ON TENSILE AND COMPRESSIVE STRENGTH OF REINFORCED PLASTIC LAMINATES.
FOREST PRODUCTS LAB MADISON WIS
Pagination or Media Count:
The paper presents the modulus of elasticity and strength values of four reinforced plastic laminates in tension and compression at room temperature and at 500F. Prior to evaluation at these temperatures, the test specimens were exposed to thermal-shock cycling. Three of the laminates evaluated in this study were reinforced with 181-A1100 glass fabric and represented three resin systems a phenolic resin CTL 37-9X, an epoxy resin ERSB-0111, and a phenyl-silane Narmco 534. The fourth was a phenolic-asbestos laminate made of RM Pyrotex felt style 41-RPD. The effects of thermalshock cycling on properties vary with the type of resin and reinforcement. In general, thermal-shock cycling had less effect on modulus of elasticity than on strength. Properties at room temperature tended to decrease after exposure to cycling, while the properties of most laminates evaluated at 500F. were not seriously affected. Author