Cyanate ester resin systems offer promise for many high-temperature polymer applications, but the potential for many applications is limited due to hydrolytic degradation of the cured polymer network, which can blister the resin, decrease its cross-linking density, and reduce the maximum allowable use temperature. This study examines the hydrolytic degradation of a Bisphenol E dicyanate ester (LECY) and a glass-fiber composite of LECY. Equilibrium water sorption, reaction rates, and glass transition temperature changes are monitored. Despite differences in diffusion and sorption, the glass fiber composite is shown to behave similarly to the neat polymer system in terms of degradation. Results were compared to PT-30 triphenolic cyanate ester, and LECY was determined to have lower equilibrium water sorption values, and a lower degradation rate.

氰酸酯树脂体系为许多高温聚合物应用提供了希望，但由于固化聚合物网络的水解降解，可能会使树脂起泡，降低其交联密度并降低最大允许量，因此其在许多应用中的潜力受到了限制。使用温度。这项研究研究了双酚E二氰酸酯（LECY）和LECY的玻璃纤维复合材料的水解降解。监测平衡水的吸收，反应速率和玻璃化转变温度的变化。尽管在扩散和吸附方面存在差异，但玻璃纤维复合材料在降解方面表现出与纯聚合物体系相似的性能。将结果与PT-30三酚氰酸酯进行了比较，并确定LECY具有较低的平衡吸水值和较低的降解率。