端羟基液体丁腈橡胶增韧环氧树脂的研究  

A STUDY ON TOUGHENING EPOXY RESIN BY LIQUID HYDROXYL TERMINATED BUTYL NITRILE RUBBER

作　　者：吕润生[1] 顾国芳[1] 

机构地区：[1]同济大学材料科学工程系,上海200092

出　　处：《高分子材料科学与工程》1991年第2期70-75,共6页Polymer Materials Science & Engineering

摘　　要：选用一种新型增韧剂——端羟基液体丁腈橡胶(HTBN)增韧环氧树脂(EP)。以抗冲强度、平面应变断裂韧性作为评价HTBN增韧EP效果的依据,分析了橡胶加入量及固化温度对EP力学性能的影响。用示差扫描量热法(DSC)和扫描电镜(SEM)分析增韧体系的相态结构,用扭辫分析(TBA)跟踪EP在不同温度下的固化行为,结合力学性能讨论了固化条件对HTBN增韧EP的微观相态和韧性的影响,并从热力学和动力学的角度分析了这种影响的原因。根据力学性能,结合透射电镜(TEM)的分析,提出了橡胶增韧环氧树脂的增韧机理。Hydroxyl terminated butyl nitrile rubber (HTBN) is used as toughner for epoxy resin. Toughening effect is evaluated by impact strength and stress intensity factor. The morphology oi cured system cured at different temperatures is analysed by SEM and DSC. Torsion braid analyser is employed to monitor the curing process of EP/HTBN at different temperatures. In combination with experiment data from mechanical properties measurement the effect of curing condition on morphology and toughness of cured EP/HTBN is discussed in terms of thermodynamics and kinetics. Finally mechanism of the toughening effect of HTBN on EP is presented.

关 键 词：环氧树脂 增韧 丁腈橡胶 改性 

分 类 号：TQ323.504[化学工程—合成树脂塑料工业]