用热分析手段研究了非离子型表面活性剂Triton X-100对4,4'-二氨基二苯甲烷环氧树脂(TGDDDM)/4,4'-二氨基二苯基砜(DDS)环氧树脂固化行为和性能的影响.DSC非等温固化反应动力学研究表明,1%(质量分数,下同)的表面活性剂对固化反应有促进作用,但10%的表面活性剂抑制了固化反应.DSC的等温固化反应中,表面活性剂抑制固化反应的进行.TGA研究表明,表面活性剂的加入对环氧树脂热稳定性影响很小.DMTA研究结果说明,表面活性剂在环氧树脂中起到了增塑荆的作用,并且和环氧树脂是互容的,表面活性剂的加入使得环氧树脂的储存模量减小,玻璃化温度逐渐降低.
The influence of nonionic surfactant, Triton X-100 on the cure behaviors and properties of tetraglycidyl 4,4'-diaminodiphenyl methane (TGDDM) epoxy with 4,4'-diaminodiphenyl sulphone (DDS) was studied with thermal analytical methods. Non-isothermal cure kinetics of differential scanning calorimeter (DSC) showed that 1% surfactant exerts acceleration effect on the cure reaction of the epoxy, while 10% surfactant hinders the cure reaction. However, it showed that all surfactants hinder the cure reaction of the epoxy during the isothermal curing. The results of thermogravimetric analyser (TGA) showed that the incorporation of surfactants has little effect on the thermal stability of the epoxy. Using dynamic mechanical thermal analysis (DMA), it was determined that the surfactant acts as a plasticizer and is miscible with the epoxy system. The storage modulus decreases with the addition of surfactant and the glass transition temperature drops with the increasing of surfactant contents.
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