以二烯丙基双酚A(DBA)和端乙烯基丁腈橡胶(VTBN)为增韧剂,两者与双马来酰亚胺(BMI)共聚后得到的预聚体作为酚醛型氰酸酯的改性剂,制备了一种改性酚醛型氰酸酯树脂。研究结果表明:DBA对酚醛型氰酸酯具有很好的催化作用,5%DBA[相对于氰酸酯(CE)质量而言]就可使CE在200℃以下固化;当m(DBA)∶m(VTBN)=5∶3时,体系的弯曲强度为132 MPa、冲击强度为12.6 J/m2、20℃和260℃剪切强度分别为16.88 MPa和9.77 MPa;改性体系的耐热性较好,其5%热失重分解温度和最大热分解速率温度分别为427.6℃和439.0℃。 Dibutyl bisphenol A (DBA) and terminal vinyl nitrile rubber (VTBN) as a toughening agent, both with bismaleimide (BMI) after the prepolymer obtained as a phenolic type cyanic acid Ester modifier to prepare a modified phenolic type cyanate resin. The results show that DBA can catalyze the formation of novolak type cyanate. When 5% DBA [relative to the mass of cyanate ester (CE)), CE can be cured below 200 ℃. When m (DBA) The flexural strength of the system is 132 MPa, the impact strength is 12.6 J / m2, the shear strength at 20 ℃ and 260 ℃ are 16.88 MPa and 9.77 MPa, respectively. The heat resistance of the modified system is Good, its 5% weight loss temperature and the maximum thermal decomposition temperature of 427.6 ℃ and 439.0 ℃.