摘要
通过阳离子交换的方法使蒙脱土由亲水性变成亲油性且层间距扩大 .采用浇模固化成型法制备了环氧树脂 /二亚乙基三胺 /蒙脱土纳米复合材料 ,并用 X射线衍射、动态力学热分析法 (DMTA)等手段研究了环氧树脂在有机蒙脱土中的插层行为 .研究结果发现 ,加入二亚乙基三胺固化剂后 ,环氧树脂插层到粘土片层间 ;而且工艺条件的变化并不明显改变插层行为 .DMTA测试表明 ,所测的玻璃化转变温度是层外固化环氧树脂的玻璃化转变温度 ,并发现二亚乙基三胺固化环氧树脂纳米复合材料的玻璃化转变温度与固化温度紧密相关 ,且加入蒙脱土后纳米复合材料的低温 α 松弛峰消失 .
The organophilic montmorillonites with increased interlayer spacings were prepared from hydrophilic clay by cation exchange with trimethylcetyl ammonium bromide. The epoxy resin/diethylenetriamine/montmorillonite nanocomposites were prepared by casting and curing processes and the intercalation behavior of epoxy resin in the organophilic montmorillonite was investigated by XRD and DMTA methods. It is found that the nanocomposites obtained were intercalated upon curing with diethylenetriamine and the intercalation was independent of the curing conditions. The glass transition temperature from DMTA analysis revealed the glass transition temperature of the extragallery cured epoxy resin and was in relation to the curing temperatures. Addition of organophilic montmorillonite led to the disappearance of the α peak of loss tangent of the nanocomposites.
出处
《应用化学》
CAS
CSCD
北大核心
2001年第6期469-472,共4页
Chinese Journal of Applied Chemistry
基金
安徽省自然科学基金资助项目 (990 463 17)
