Acycloaliphatic(CDR -0122) epoxy resin has good heat-resistance, but it is characterized by being brittle. CDR -0122 modified with different mass fraction of epoxy ( E -51) were studied. First, DSC analysis was carried out to determine the activation energy, reaction order and the best curing procedure of the modified resin. Then mechanical property and heat-resistance property of the cured modified resin were tested. The results showed that, compared with the unmodified CDR -0122, the activation energy of the modified resin system decreased slightly, and its tensile strength and flexural strength increased by 52. 38% and 54. 77% , respectively, but the glass transition temperature decreased slightly. Considering all aspects of performance, the system of CDR -0122 modified with 30 wt% E -51 is the best one.%二氧化双环戊二烯(CDR -0122)环氧树脂固化物的耐热性较好,但脆性大.采用不同质量分数的环氧(E -51)改性CDR -0122.对不同的改性体系进行DSC分析,确定其活化能、反应级数和最佳固化工艺.对改性的CDR - 0122环氧树脂固化物进行力学性能和耐温性能测试.结果表明:当加入E-51的质量分数为30％时,CDR -0122的树脂体系的综合性能最优.相比改性前,改性后的树脂体系活化能略有下降,并且其拉伸强度和弯曲强度分别提高了52.38％和54.77％,但玻璃化转变温度略有下降.
展开▼
