气相生长碳纤维对环氧树脂固化反应的影响及其复合物固化动力学研究  

THE INFLUENCE OF VAPOR-GROWN CARBON FIBERS ON THE CURE REACTION OF EPOXY AND THE CURING KINETICS OF THE COMPOSITES

作　　者：谢鸿峰[1] 刘炳华[1] 孙清[1] 袁钻如[2] 沈俭一[1] 程垅时 

机构地区：[1]南京大学化学化工学院介观化学教育部重点实验室,南京210093 [2]南京大学现代分析中心,南京210093

出　　处：《高分子学报》2005年第6期891-895,共5页Acta Polymerica Sinica

基　　金：江苏省科技项目基金(基金号BG2002019);国家教育部博士点基金(基金号20030284003)资助项目

摘　　要：用示差扫描量热方法研究了气相生长碳纤维作为填料对4,4′-二氨基二苯甲烷四缩水甘油环氧树脂(TGDDM)/4,4′-二氨基二苯基砜(DDS)等温固化反应的影响.与纯环氧树脂一样,气相生长碳纤维复合物的固化反应也属于自催化反应类型.气相生长碳纤维对环氧树脂的固化反应动力学影响很小.固化反应的过程可以用一种修正过的自催化动力学模型来描述,在整个固化反应过程中纯TGDDM/DDS环氧树脂及其气相生长碳纤维复合物模型拟合得到的结果和实验数据相当一致.The influence of vapor-grown carbon fibers （VGCFs） as a filler on the isothermal cure reaction of tetraglycidyl-4,4＇-diaminodiphenylmethane （TGDDM）/4, 4＇-diaminodiphenylsulphone （DDS） epoxy was studied using differential scanning calorimetry （DSC）. When VGCFs were incorporated into the TGDDM/DDS system, the activation energy of the composites decreased. The cure reactions of VGCF composites showed an autocatalytic behavior as well as the pure TGDDM/DDS epoxy. DSC experimental results showed that VGCF had very small effect on cure kinetics of the TGDDM/DDS system. A modified autocatalytic model was used to describe the cure reaction. Good agreement between data of the modified autocatalytic model and the experimental ones was found over the whole curing temperature range for both neat TGDDM/DDS epoxy and its VGCF composites.

关 键 词：气相生长碳纤维(VGCF) 环氧树脂 固化动力学 固化反应 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]