Mechanical and swelling behaviors of rubber: A comparison of some molecular models with experiment
Mechanical and swelling behaviors of rubber: A comparison of some molecular models with experiment
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DOI：
10.1177/108128659900400201
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发表时间：
1999-06-01
影响因子：
2.6
通讯作者：
McKenna, GB
中科院分区：
文献类型：
--
作者：
Han, WH;Horkay, F;McKenna, GB
回顾了几种当前的网络模型（约束链模型、定位模型、类液体模型和八链模型），这些模型是为了解释非理想的橡胶行为而开发的。讨论了干燥和肿胀网络的应力-应变关系。结果表明，Flory、Erman 和 Monnerie 的约束链模型为交联橡胶网络的干燥状态和溶胀状态特性的应力应变响应所考虑的模型提供了最佳描述。 Gaylord 和 Douglas 的定位模型非常适合干燥状态的应力应变数据，但对膨胀状态下的机械响应的预测不如约束链模型获得的结果。 DiMarzio 的类液体模型对延伸行为进行了合理的描述，但它不能解释观察到的弹性模量随压缩增加而适度下降（应力减小）；类液体模型也不能正确预测模量随着膨胀的增加而减小。 Arruda 和 Boyce 的八链模型提出了应力应变关系，其中包括网络链的有限延展性。结果表明，在中等变形率下，八链模型在干燥和膨胀状态下都无法提供与实验应力应变数据的定性一致性。
A review is given of several current network models (constrained chain model, localization model, liquidlike model, and eight-chain model) that have been developed to explain nonideal rubbery behavior. The stress-strain relationships for both dry and swollen networks are discussed. It is shown that the constrained chain model of Flory, Erman, and Monnerie provides the best description of the considered models for the stress-strain response of both the dry state and swollen state properties of cross-linked rubber networks. The localization model of Gaylord and Douglas fits the dry-state stress-strain data very well, but the predictions of the mechanical response in the swollen state are not as good as those obtained with the constrained chain model. The liquidlike model of DiMarzio yields reasonable description of extension behavior, but it does not explain the observed modest decrease of the elastic modulus (reduced stress) with increasing compression; nor does the liquidlike model predict the decreasing modulus with increasing swelling correctly. The eight-chain model of Arruda and Boyce puts forward a stress-strain relation that includes the finite extensibility of the network chains. It is shown that at moderate deformation ratios, the eight-chain model does not provide even qualitative agreement with the experimental stress-strain data for both the dry and swollen states.