以甲基笼型倍半硅氧烷(POSS)作为氰酸酯树脂(CE)的改性剂,制备出一种POSS/CE杂化复合材料。研究了杂化复合材料中POSS用量对CE结构及力学性能的影响,同时采用红外光谱(FT-IR)法对不同POSS/CE体系的反应性进行了研究。结果表明:POSS的加入对CE的反应性影响不大,有利于POSS/CE杂化体系固化工艺的制定;当杂化体系中w(POSS)=5%时,材料的冲击强度(9.7 kJ/m2)相对最大(提高了49%),弯曲强度(90 MPa)也相对较高,说明适量的POSS对CE具有明显的增韧、增强作用。 A POSS / CE hybrid composite was prepared using methylsaturated silsesquioxane (POSS) as a modifier for cyanate resin (CE). The effects of POSS content on the structure and mechanical properties of CE were investigated. The reactivity of different POSS / CE systems was studied by FT-IR. The results showed that the addition of POSS had little effect on the reactivity of CE, which was beneficial to the curing process of POSS / CE hybrid system. When w (POSS) = 5% in the hybrid system, the impact strength (9.7 kJ / m2) is relatively largest (49% increase), and the bending strength (90 MPa) is also relatively high, indicating that the proper amount of POSS has a significant toughening and enhancing effect on CE.