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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Novel ceramer materials based on JEFFAMINE (R) poly(propylene oxide) oligomers and tetramethoxysilane (vol A37, pg 145, 2000)
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Novel ceramer materials based on JEFFAMINE (R) poly(propylene oxide) oligomers and tetramethoxysilane (vol A37, pg 145, 2000)

机译：基于JEFFAMINE®聚环氧丙烷低聚物和四甲氧基硅烷的新型陶瓷体材料（第A37卷，第145页，2000年）

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摘要

Novel hybrid organic-inorganic network materials have been generated based on poly(propylene oxide) (PPO) and tetramethoxysilane (TMOS). The PPO source chosen for this study was the family of JEFFAMINE(R)s often employed as epoxy curing agents. These materials were end-functionalized with trialkoxysilane groups which later were exploited in the sol-gel reaction. The sol-gel variables of water and acid catalyst concentration had little influence on the final structure and properties of the resulting network materials for the ranges probed. Increasing the TMOS content, however, generated a structure that was increasingly more mass fractal in character. This same variable also had a distinct effect on the mechanical properties of the hybrids; the TMOS reacts to form a silicate material which behaved as a reinforcing filler for the rubbery PPO component by increasing and broadening the glass transition. Decreasing the initial PPO oligomer molecular weight had a similar effect on mechanical properties, since the silicate content increases with decreasing PPO molecular weight. This is due to the increasing concentration of alkoxysilane end-groups and also the decreasing of the average molecular weight between crosslinks with decreasing PPO molecular weight. For non-TMOS containing materials, small angle X-ray scattering revealed a correlation length associated with a silicate phase separated by PPO chains, which increased with PPO molecular weight, as expected. [References: 1]
机译：基于聚环氧丙烷（PPO）和四甲氧基硅烷（TMOS）的新型杂化有机-无机网络材料已经产生。本研究选择的PPO来源是经常用作环氧固化剂的JEFFAMINE®系列。这些材料用三烷氧基硅烷基团进行了末端官能化，随后被用于溶胶-凝胶反应中。水和酸催化剂浓度的溶胶-凝胶变量对所探测范围的最终网络材料的最终结构和性能影响很小。然而，增加TMOS含量会产生一种结构，其特征上的质量分形越来越多。这个相同的变量也对杂种的机械性能产生了明显的影响。 TMOS反应形成硅酸盐材料，通过增加和加宽玻璃化转变来充当橡胶状PPO组分的增强填料。降低初始PPO低聚物分子量对机械性能具有相似的影响，因为硅酸盐含量随PPO分子量的降低而增加。这是由于烷氧基硅烷端基的浓度增加，并且交联之间的平均分子量随PPO分子量的降低而降低。对于不含TMOS的材料，小角度X射线散射揭示了与被PPO链隔开的硅酸盐相相关的相关长度，该长度随PPO分子量的增加而增加。 [参考：1]

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