【摘要】 以双酚E氰酸酯树脂（BEDCy）为基体树脂，选用乙酰丙酮铝[Zn（acac）₂]/二烯丙基双酚A（DBA）为混合催化剂，并以聚醚砜（PES）作为增韧剂，制备了一种低温固化且高韧性的氰酸酯胶黏剂。采用差示扫描量热法（DSC）、傅里叶变换红外光谱分析法和热重分析对DBA的催化效果进行了评价。并通过冲击试验、剪切试验以及热重分析探究不同比例的聚醚砜（PES）对BEDCy力学性能和热稳定性能的影响。结果表明，相较于单独使用Zn（acac）₂催化BEDCy，酚类化合物和Zn（acac）₂构成的混合催化剂有更好的催化效果，其中6%DBA与0.05%Zn（acac）₂对BEDCy固化的催化效果最佳，其DSC曲线的峰温从218℃降到了194℃，实现了在200℃以下的完全固化；与壬基酚（NoP）/Zn（acac）₂/BEDCy体系相比，DBA/Zn（acac）₂/BEDCy体系具有更好的固化性能和热稳定性；以5%PES作为CE的增韧剂时，粘接强度比未改性的CE树脂提高了64%；且其5%热失重温度达到了430℃，具有良好的耐热性，实现了胶黏剂耐温性和韧性上的统一。更多还原

【Abstract】 A low-temperature curing and high-toughness cyanate ester adhesive was developed using bisphenol-E cyanate ester(BEDCy) as the base resin. The adhesive system employed a hybrid catalyst of aluminum acetylacetonate [Zn(acac)2] and diallylbisphenol A(DBA), with polyethersulfone(PES) as a toughening agent. The catalytic performance of DBA was evaluated by differential scanning calorimetry(DSC), Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Results indicated that the Zn(acac)2/DBA hybrid catalyst was more effective than Zn(acac)2 alone in promoting the curing of BEDCy. An optimal formulation with 6 wt% DBA and 0. 05 wt% Zn(acac)2 reduced the DSC curing peak temperature from 218 to 194 °C, enabling complete curing below 200 °C. This DBA/Zn(acac)2/BEDCy system also exhibited superior curing properties and thermal stability compared to a system catalyzed by nonylphenol. Furthermore, the impact of PES content on the mechanical and thermal properties was investigated. The incorporation of 5 wt% PES as a toughener resulted in a 64 % increase in bond strength compared to the unmodified CE, while maintaining a high 5 % weight-loss temperature of 430 ℃. This work successfully achieves an adhesive with an effective balance of low curing temperature, high toughness, and excellent thermal resistance.更多还原