Water in epoxy resins Part II. Diffusion mechanism
Water in epoxy resins Part II. Diffusion mechanism
复制标题
环氧树脂中的水第二部分。
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
L. Broutman
中科院分区：
文献类型：
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作者：
T. Wong;L. Broutman
提出了水在玻璃态环氧树脂中的扩散机理模型。假设聚合物网络由两个区域组成，水分子在这两个区域具有不同的迁移率。通过考虑水分子在这些区域中的分布，可以描述吸附和再吸收过程中扩散系数的浓度依赖性。当吸附温度接近环氧水二元混合物的有效玻璃化转变温度时，扩散系数趋于恒定。该模型还对这一效应进行了解释。
A model is proposed for the diffusion mechanism of water in glassy epoxy resins. The polymer network is assumed to consist of two regions in which water molecules possess different mobilities. By considering the distribution of water molecules among these regions it is possible to describe the concentration dependency of the diffusion coefficient in the sorption and resorption processes. The diffusion coefficient becomes constant when the sorption temperature is close to the effective glass transition temperature of the epoxy-water binary mixture. An explanation of this effect is also provided by the model.