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采用新型乙烯基侧链环氧树脂(VE)与E-51环氧树脂/液体丁腈橡胶体系共混,用万能材料试验机、动态力学分析仪和扫描电镜表征了VE的含量对树脂/橡胶体系力学性能、玻璃化转变温度(Tg)、微观相态结构的影响。结果表明,利用VE与E-51、丁腈橡胶良好的相容性可以显著改善树脂/橡胶体系的相容性;添加了VE后,用液体丁腈橡胶改性过的环氧树脂韧性提高,并保持了较好的力学强度;当VE/E-51=4/6,NBR含量为20%(wt)时,其拉伸强度比纯E-51/NBR体系提高11.9%,弯曲强度提高31.3%,断裂伸长率提高14.8%;体系的Tg、微观相态结构都随VE的含量呈现出有规律的变化。
A novel vinyl side chain epoxy resin (VE) was blended with E-51 epoxy resin / liquid nitrile rubber system. The mechanical properties of the resin / rubber The mechanical properties of the system, the glass transition temperature (Tg) and the microstructure of the microstructure. The results show that the compatibility of VE with E-51 and nitrile rubber can significantly improve the compatibility of the resin / rubber system. After the addition of VE, the toughness of the epoxy resin modified with liquid nitrile rubber improves, The tensile strength of VE / E-51 = 4/6 was 11.9% higher than that of pure E-51 / NBR system and the flexural strength was increased by 31.3% when the content of NBR was 20% %, Elongation at break increased by 14.8%. The Tg and microstructure of the system all showed a regular change with the content of VE.