NATURE OF THE WATER EPOXY INTERACTION
NATURE OF THE WATER EPOXY INTERACTION
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DOI：
10.1021/ma00148a008
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发表时间：
1985-01-01
期刊：
影响因子：
5.5
通讯作者：
KARASZ, FE
中科院分区：
文献类型：
--
作者：
JELINSKI, LW;DUMAIS, JJ;KARASZ, FE
环氧树脂吸收少量(1-3wt%)的水会产生很大的增塑作用，并使其机械性能下降。我们提出的结果提供了对环氧树脂与水相互作用的分子细节的新见解。这些结果表明：(1)环氧树脂中的水在运动中受到阻碍，分子从一个位置到另一个位置的停留时间约为7×10~(-10)S，(2)没有“自由”水，(3)没有证据表明存在紧密结合的水，以及(4)水不太可能破坏环氧树脂中的氢键网络。这些结果与水对这些含羟基体系起增塑剂的观点是一致的，就像它对不含可交换质子的聚合物一样。
Absorption of small amounts (1-3 wt%) of water by epoxy resins effects a substantial plasticizing action and degradation of their mechanical properties. We present results that provide new insight into the molecular details of the interaction of epoxy resins with water. These results show (1) that the water in epoxy resins is impeded in itsmovement, with the molecules hoppingfrom site to site with an approximate residence time per site of 7 X 10" 10 s,(2) that there is no “free” water,(3) that there is no evidence for tightly bound water, and (4) that it is unlikely that the water disrupts the hydrogen-bond network in the epoxy resin. These results are consistent with the notion that water acts simply as a plasticizer for these hydroxyl-containing systems, just as it does for polymers which contain no exchangeable protons.