A Diffused-Constraint Theory for the Elasticity of Amorphous Polymer Networks. 1. Fundamentals and Stress-Strain Isotherms in Elongation
A Diffused-Constraint Theory for the Elasticity of Amorphous Polymer Networks. 1. Fundamentals and Stress-Strain Isotherms in Elongation
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DOI：
10.1021/ma00118a043
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发表时间：
1995-07
期刊：
影响因子：
5.5
通讯作者：
A. Kloczkowski;J. E. Mark;B. Erman
中科院分区：
文献类型：
--
作者：
A. Kloczkowski;J. E. Mark;B. Erman
该理论是Flory和Erman的约束结理论以及Erman和Monnerie随后的约束链理论的推广。在这些早期的理论中，弹性自由能ΔAel被计算为和ΔAel=ΔAph+ΔAc，其中ΔAph是对幻象网络的贡献，附加项ΔAc是由于涨落的约束的影响。但是，约束现在沿链连续应用，而不是仅允许约束影响网络链的连接点或质心的波动。对该扩散约束模型的算例计算结果与已有理论的相应结果进行了比较。
The theory proposed is an extension of the constrained-junction theory of Flory and Erman and the subsequent constrained-chain theory of Erman and Monnerie. As in these earlier theories, the elastic free energy ΔA el is calculated as the sum ΔA el = ΔA ph + ΔA c , where ΔA ph is the contribution for a phantom network, and the additional term ΔA c is due to the effects of constraints on fluctuations. Instead of allowing the constraints to affect the fluctuations of only the junctions or the centers of mass of the network chains, however, the constraints are now applied continuously along the chains. The results of illustrative calculations on this diffused-constraint model are compared with the corresponding results from the earlier theories.