CAJ | 학술논문

采用差式扫描量热法、红外光谱分析法、静态力学分析法测试了树脂浇注体老化前后的玻璃化转变温度Tg和力学强度参数，并对环氧树脂浇注体的老化机理进行了分析。结果表明：经240h湿热和盐雾老化后力学强度参数值和Tg都下降了，而经240h冷热循环老化后力学强度参数值和Tg均有所提高。老化机理分析表明：湿热和盐雾老化后，树脂浇铸体由于水分子的浸入，产生了增塑效果，导致力学性能和Tg下降；而冷热老化后，树脂发生后固化反应，分子链交联密度进一步增大，因此，力学性能和Tg均提高。
채용차식소묘량열법、홍외광보분석법、정태역학분석법측시료수지요주체노화전후적파리화전변온도Tg화역학강도삼수，병대배양수지요주체적노화궤리진행료분석。결과표명：경240h습열화염무노화후역학강도삼수치화Tg도하강료，이경240h랭열순배노화후역학강도삼수치화Tg균유소제고。노화궤리분석표명：습열화염무노화후，수지요주체유우수분자적침입，산생료증소효과，도치역학성능화Tg하강；이랭열노화후，수지발생후고화반응，분자련교련밀도진일보증대，인차，역학성능화Tg균제고。
By means of DSC, FITR and static mechanic tests, determined the glass transition temperature Tg andmechanical properties of epoxy resin castings before and after aging. The results showed that the mechanical properties and Tg decreased after 240 h hydrothermal aging and salt-spray test, while after 240 h thermal circulation aging, the mechanical properties and Tg increased. The aging mechanism analysis showed that after hydrothermal aging and salt-spray aging, Tg and mechanical properties decreased owing to the plasticization caused by water molecules immersion, while after thermal circulation aging, the T and mechanical properties increased because of cross-linking density caused by post-curing.