摘要
用热分析法研究羧甲基纤维素钠(CMC)对环氧树脂E44/二氨基二苯基甲烷(DDM)体系固化行为和性能的影响。差示扫描量热法(DSC)非等温固化反应动力学研究表明,CMC的加入对固化反应有促进作用。Starink方程计算了E44/DDM体系活化能为51.14 kJ/mol,CMC加入后活化能为40.52 kJ/mol-51.01 kJ/mol。用n级非等温动力学分析,获得了固化反应的动力学参数。热重分析(TGA)表明,CMC的加入有利于提高环氧树脂固化物的热稳定性。动态力学性能(DMTA)分析表明,CMC和环氧树脂体系相容性很好,且CMC的加入增大了环氧树脂固化物的储能模量,而对玻璃化转变温度影响较小。
The influences of sodium carboxymethyl cellulose （CMC） on the cure behavior and properties of epoxy resin with 4,4＇-diamino diphenyl methane （DDM） were studied by thermal analytical methods. Nonisothermal cure kinetics of differential scanning calorimeter （DSC） show that the CMC has acceleration effect on the cure reaction. The apparent activation energy （E） of epoxy/DDM system is about 51.14 kJ/mol, and the apparent activation energies of CMC/epoxy/DDM system rang from 40.52 kJ/mol to 51.01 kJ/mol. The kinetic parameters of curing reaction were determined by the n order model. The results of TGA indicate that the incorporation of CMC improves the thermal stability of epoxy. CMC is miscible with the epoxy system and has a positive impact, results in the storage modulus increasing and the glass transition temperature （Tg） remaining.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第3期89-93,共5页
Polymer Materials Science & Engineering
基金
国家自然科学基金资助项目(20976032
21076049)
中央高校基本科研业务费专项基金(HEUCFZ1018
HEUCFT1009)
