肿胀 的
天然橡胶
交叉连接
高分子科学
高分子化学
材料科学
化学
聚合物
链接(几何体)
热力学
化学工程
复合材料
作者
J. L. Valentín,Javier Carretero-González,I. Mora-Barrantes,Walter Chassé,Kay Saalwächter
出处
期刊:Macromolecules
[American Chemical Society]
日期:2008-06-14
卷期号:41 (13): 4717-4729
被引量:164
摘要
Equilibrium swelling is a feasible and simple experiment to determine the cross-link density of networks. It is the most popular and useful approach; however, in most of the cases, the given values are highly uncertain if not erroneous. The description of the complex thermodynamics of swollen polymer networks is usually based on the Flory−Rehner model. However, experimental evidence has shown that both the mixing term described by the Flory−Huggins expression and the elastic component derived from the affine model are only approximations that fail in the description and prediction of the rubber network behavior. This means that the Flory−Rehner treatment can only give a qualitative evaluation of cross-link density because of its strong dependence on the thermodynamic model. In this work, the uncertainties in the determination of the cross-link density in rubber materials by swelling experiments based on this model are reviewed. The implications and the validity of some of the used approximations as well a...
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