摘要
采用非等温DSC(差示扫描量热)法对EP(环氧树脂)/改性DDM(4,4′-二氨基二苯基甲烷)体系的固化反应过程进行了跟踪。采用Kissinger、Ozawa、Crane和T-β(温度-升温速率)外推法等得到该固化体系的动力学参数和固化工艺条件,并对其力学性能和热变形温度进行了测定。结果表明:EP/改性DDM体系的表观活化能为49.43 kJ/mol,反应级数为0.869,固化条件为"85℃/2 h→125℃/2 h",热变形温度为130℃;与EP/DDM体系相比,该固化体系的表观活化能降低了7.0%,热变形温度下降了16.1%,拉伸强度和压缩强度提高了20%以上,而弯曲强度和弯曲模量基本上保持不变。
The curing reaction process for EP（epoxy resin）/modified DDM（4,4＇-diamino diphenyl methane） system was tracked by nonisothermal DSC（differential scanning calorimetry）. The kinetics parameters and curing process conditions for the curing system were obtained by Kissinger, Ozawa, Crane and T--β（temperature-heating speed） extrapolation. And the mechanical properties and thermal deformation temperature were mensurated. The results showed that the apparent activation energy was 49.43 kJ/mol, reaction order was 0.869, curing conditions were ＂85 ℃/2 h→125 ℃/2 h＂, thermal＇ deformation temperature was 130℃ for EP/modified DDM system. The apparent activation energy and thermal deformation temperature of EP/modified DDM system were 7.0% and 16.1% respectively less than those of EP/DDM system, the tensile strength and compressive strength of EP/modified DDM system were above 20% more than those of EP/DDM system, but both bend strength and bending modulus were almost Unchanged.
出处
《中国胶粘剂》
CAS
北大核心
2011年第12期1-4,共4页
China Adhesives
基金
国家自然科学基金项目(30771691)
关键词
环氧树脂
4
4'-二氨基二苯基甲烷
固化反应
动力学
力学性能
热变形温度
epoxy resin
4,4＇-diamino diphenyl methane （DDM）
curing reaction
kinetics
mechanical property
thermal deformation temperature
