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采用环氧基硅烷(ESi)对双酚A型二氰酸酯树脂(BCE)进行改性,研究了ESi用量对ESi/BCE体系力学性能和动态力学性能等影响。结果表明:适量的ESi可以明显提高BCE的韧性和强度;当w(ESi)=6%时,ESi/BCE改性体系的力学性能最好,其冲击强度和弯曲强度分别从10.1 kJ/m2、94.11 MPa提高到14.49 kJ/m2、110.94 MPa;ESi/BCE体系的交联密度降至适度是其韧性提高的主要原因,并且其玻璃化转变温度(Tg)低于纯BCE体系(但降幅不大)。
Epoxy silane (ESi) was used to modify bisphenol A dicyanate resin (BCE). The effects of ESi dosage on the mechanical properties and dynamic mechanical properties of ESi / BCE were studied. The results show that the ESi / BCE modified system has the best mechanical properties at w (ESi) = 6%, and the impact strength and flexural strength are respectively 10.1 kJ / m2, 94.11 MPa to 14.49 kJ / m2 and 110.94 MPa, respectively. The decrease of the crosslinking density of ESi / BCE system is the main reason for its toughness improvement, and its glass transition temperature (Tg) is lower than pure BCE system ).