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首页> 外文学位 >Preparation, characterization and properties of montmorillonite/epoxy compounds.
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Preparation, characterization and properties of montmorillonite/epoxy compounds.

机译：蒙脱石/环氧化合物的制备，表征和性能。

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摘要

In order to utilize the expanding nature of smectite clays in the compensation of shrinkage in epoxy systems, several "epoxyphilic" montmorillonites were prepared via ion exchange reactions. These epoxyphilic montmorillonites contain moieties within their structures that can react with either the epoxide resin, curing agent or both.;The swelling behavior of aminolauric acid-intercalated montmorillonite (ALA-MMT) was studied under various swelling conditions prior to curing of the epoxy. It was determined that to obtain larger montmorillonite interlayer distances in the cured epoxy, the ALA-MMT should be swollen in the curing agent rather than the epoxide resin. The curing reaction was shown to increase the interlayer spacing of the ALA-MMT more efficiently when swollen in the curing agent rather than the epoxide resin. Based on these results, models for the swelling behavior of ALA-MMT is proposed.;The addition of 2-5% epoxyphilic montmorillonite to epoxy was observed to reduce the maximum residual stress by more than 50%. The glass transition temperatures of these clay/epoxy compounds were generally higher than the pure epoxy. The modulus and ultimate strengths of these compounds were as high or higher than pure epoxy. However, due primarily to large agglomerations of montmorillonite particles, the ultimate elongation was drastically reduced.
机译：为了利用蒙脱石粘土的膨胀性质来补偿环氧体系中的收缩，通过离子交换反应制备了几种“亲电子的”蒙脱土。这些亲电子的蒙脱土在其结构中含有可与环氧树脂，固化剂或两者反应的部分。;在环氧树脂固化之前，在各种溶胀条件下研究了氨基月桂酸-嵌入的蒙脱石（ALA-MMT）的溶胀行为。已确定要在固化的环氧树脂中获得更大的蒙脱土层间距离，ALA-MMT应该在固化剂而不是环氧树脂中溶胀。当在固化剂而不是环氧树脂中溶胀时，固化反应显示出更有效地增加了ALA-MMT的层间距。基于这些结果，提出了ALA-MMT的溶胀行为模型。观察到在环氧树脂中添加了2-5％的亲油蒙脱石可以将最大残余应力降低50％以上。这些粘土/环氧化合物的玻璃化转变温度通常高于纯环氧。这些化合物的模量和极限强度与纯环氧树脂一样高或更高。然而，主要由于蒙脱石颗粒的大团聚，最终伸长率大大降低。

著录项

  • 作者

    Kelly, Paul Thomas.;

  • 作者单位

    Case Western Reserve University.;

  • 授予单位 Case Western Reserve University.;
  • 学科 Materials science.;Mineralogy.;Polymer chemistry.
  • 学位 Ph.D.
  • 年度 1994
  • 页码 170 p.
  • 总页数 170
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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