利用热分析技术对具有高温快速固化性能的间苯二酚缩水甘油醚/间苯二甲胺体系的热机械性能和表观固化反应动力学进行了研究。热机械性能分析(DMA和TMA)结果表明,间苯二酚缩水甘油醚/间苯二甲胺固化产物的玻璃化转变温度为83℃,室温下储能模量为2600 MPa,玻璃态热膨胀系数(α1)为54.9×10-6℃-1,橡胶态的线性热膨胀系数(α2)为177.9×10-6℃-1。通过恒温和非恒温模式差示扫描量热(DSC)测试得到体系的表观反应活化能为62.7 kJ/mol,由此估算出固化反应在160℃时仅需数秒即可完成。
The thermal and mechanical properties of a fast curing system,resorcinol diglycidyl ether/m-xylylene diamine(RDGE/XDA),were investigated by means of thermal analysis techniques.The results of dynamic mechanical analysis(DMA) and thermo-mechanical analysis(TMA) show that the glass transition temperature of RDGE/XDA is 83 ℃,and the storage modulus at room temperature is 2600 MPa.The coefficients of thermal expansion corresponding to the glassy and rubbery state is 54.9×10-6 ℃-1 and 177.9×10-6 ℃-1,respectively.The apparent activation energy obtained through isothermal and non-isothermal differential scanning calorimetry(DSC) measurement is 62.7 kJ/mol.Thus,the curing process of RDGE/XDA takes only a few seconds at 160 ℃ estimated from the curing rate at lower temperature and the apparent activation energy.
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