Effects of Moisture on Chemical Interactions at a Polymer-Fiber Interface.

摘要

The objective of this investigation was to determine the effects of moisture and temperature on chemical interactions at the interface of a specific graphite fiber/epoxy resin composite. Studies to evaluate these effects comprised the determination of the number and type of surface sites on a Celion R GY-70 graphite fiber, that react with epoxy groups; the measurement of the rate of degradation of these sites under dry and humid conditions at elevated temperatures; and a comparison of these rates with rates of the irreversible loss of interface properties of graphite fiber/epoxy resin composites. From these results it was concluded that cleavage of fiber/resin interface bonds may be discounted as the source for the irreversible strength losses experienced in graphite fiber/epoxy resin composites.