Viscoelasticity of silicate polymers and its structural implications
Viscoelasticity of silicate polymers and its structural implications
复制标题
硅酸盐聚合物的粘弹性及其结构意义
DOI：
10.1016/0022-3093(70)90183-3
复制
发表时间：
1970
影响因子：
3.5
通讯作者：
K. Takahashi
中科院分区：
文献类型：
--
作者：
A. Eisenberg;K. Takahashi
结果表明，在M2O:SiO2≈1（其中M为一价阳离子或二价阳离子的一半）的组成区域，硅酸盐的粘弹性性质是相同的，并且与组成无关，如果结果以玻璃化转变为参考温度绘制。这意味着，要么材料的结构是独立的组成，这是不可能的，鉴于其他工人以前的结果，或者是一个快速的键交换反应，这决定了长时间的粘弹性行为。研究还表明，与不发生键交换的磷酸盐一样，玻璃化转变温度随反离子性质的变化而变化，这表明硅酸盐的玻璃化转变机制是静电相互作用的松动而不是键交换。
It is shown that the viscoelastic properties of silicates in the composition region of M2O:SiO2≈ 1 (where M is a monovalent cation or half of a divalent one) are identical and independent of composition if results are plotted with the glass transition as the reference temperature. This implies that either the structure of the material is independent of composition, which is unlikely in view of previous results of other workers, or that a rapid bond interchange reaction is present which determines the long-time viscoelastic behaviour. It is also shown that the glass transition temperature varies with the nature of the counterion in the same manner as in the phosphates in which no bond interchange occurs, which indicates that the glass transition mechanism in the silicates is a loosening of electrostatic interactions rather than bond interchange.