双马来酰亚胺改性苯并噁嗪树脂的力学性能及摩擦性能

苯并噁嗪(BOZ)树脂作为一种新型的热固性PF(酚醛树脂),具有诸多优异性能,但其韧性和耐磨性较差。以AE-BMI(含烯丙基醚的双马来酰亚胺预聚体)为改性剂制备AE-BMI/BOZ改性树脂,并对其力学性能和摩擦性能进行了研究。结果表明:适量的AE-BMI对BOZ树脂具有明显的增韧增强作用,并且其耐磨性也明显提高;当w(AE-BMI)=15%时,AE-BMI/BOZ改性体系的弯曲强度(125.53 MPa)和冲击强度(11.57 kJ/m2)分别比纯BOZ体系提高了57%和60%,并且其摩擦因数(0.27)和磨损率18.50×10-6mm3/(N.m)]分别比纯BOZ体系降低了15.6%和50.6%。

Mechanical properties and friction properties of benzoxazine resin modified by bismaleimide

Benzoxazine(BOZ) resin as a new type thermosetting PF(phenol-formaldehyde resin),has many excellent properties,but its toughness and attrition-resistance were more poor.With AE-BMI(bismaleimide with allyl ether prepolymer) as modifier,an AE-BMI/BOZ modified resin was prepared,and its mechanics properties and friction properties were investigated.The results showed that the optimum AE-BMI contents had obviously toughening and strengthening functions in BOZ resin,and its attrition-resistance was obviously enhanced.The bend strength(125.53 MPa) and impact strength(11.57 kJ/m2) of AE-BMI/BOZ modified system were 57% and 60% respectively more than those of pure BOZ system,and the attrition rate18.50×10-6 mm3/(N·m)] and friction factor(0.27) of AE-BMI/BOZ modified system were 15.6% and 50.6% respectively less than those of pure BOZ system when mass fraction of AE-BMI was 15%.