环氧树脂／有机膨润土复合体系的性能研究  

Study on the Performance of Epoxy Resin/O-bentonite Composite System

作　　者：牟其伍[1] 朱红梅[1] 粟笛[1] 

机构地区：[1]重庆大学数理学院,重庆400030

出　　处：《材料导报（纳米与新材料专辑）》2009年第1期226-228,共3页

摘　　要：以双酚A型环氧树脂（CYD128）为基体，有机膨润土为增韧改性剂，选用自行合成的固化剂，固化不同质量比的环氧树脂／有机膨润土复合体系的共混物，测定了共混固化复合体系的冲击强度、拉伸强度和热分解温度，并用扫描电镜（SEM）观察了环氧树脂／有机膨润土复合体系的微观结构。结果表明：随着有机膨润土含量的增加，冲击强度逐渐增加，当有机膨润土含量达3％～4％时冲击强度出现了极大值；随着有机膨润土含量的进一步增加，冲击强度减小。当共混复合体系的质量比为（3～4）：100时，复合体系增韧的效果非常明显，把冲击强度从20．4kJ／m^2提高到25．0kJ／m^2；拉伸强度和热分解初始温度均有较大程度的改善；并且随着有机膨润土的加入，复合体系的断裂面逐渐呈韧性断裂。With bisphenol a based epoxy resins（CYD-128） as matrix,o-bentonites as toughening agent,sell-made curing agent,the CYD-128/o-bentonites compounds with different composition mass ratios are cured. The impact strength, tensile strength and thermal decomposition temperature of the cured blends materials are determined,and the microstructure of CYD-E8/o-bentonites compound is observed by SEM. The results show that the impact strength increases gradually,and achieves the maximum value when the content of the o bentonites is about 3 %-4% and then decreases with the increasing content of o-bentonites. The toughening effect of compound system is obvious with composition mass ratio of （3-4） ： 100. The impact strength is enhanced from 20. 4kJ/m^2 to 25. 0kJ/m^2 and tensile strength and thermal decomposition temperature are enhanced greatly too. With the addition of o-bentonites, composites fracture surface gradually exhibits fracture toughness.

关 键 词：环氧树脂 有机膨润土 改性 耐热性 

分 类 号：TQ433.437[化学工程] TD875.5[矿业工程—非金属矿开采]