Evaluation of the Effect of Processing Parameters on the Adhesive Bonding of Glass-Reinforced Plastics.

摘要

Shear strength data for bonds made by adhesively bonding a glass-reinforced plastic (XP-114 epoxy laminate) with three different adhesives (Epon 828/V-140, EC-2214, AF-126) are examined statistically. It is shown that surface exposure time (SET) up to 30 days appears to be immaterial for AF-126 bonds but that shorter SET times give somewhat better bonds in the other cases. Machine sanding leads to better results than hand sanding for the EC-2214 and AF-126 systems. No appreciable difference between hand or machine sanding was discerned for the Epon 828/V-140 system. Only in the case of AF-126 were bond strengths significantly lower after aging 30 days at 120f (49c) and 95% RH. These results indicate that the effect of processing parameters on resultant bond strength is highly dependent on the adhesive system used in bonding the glass-reinforced plastic. Methods are described and curves are shown illustrating how smoothed distribution curves of bond strength can be used to observe data overlap and differences.