arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.1622cond-mat.softcond-mat.mtrl-sciphysics.chem-ph
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网络

Networks

C. M. Roland

摘要:

分析橡胶网络的大应变行为的两种方法是从现象学的角度,使用从连续介质力学得出的应变能函数,以及分子模型,应用统计力学计算链取向对熵的影响。早期的橡胶弹性模型忽略了分子间相互作用,而后来的发展(“约束模型”)包括缠结或空间约束对机械应力的影响。这些橡胶弹性本构方程进行了比较实验结果,并讨论了网络弹性的松弛行为的连接。对于常规弹性体,在刚度和强度之间存在折衷。不同的方法来规避这一限制进行了说明。给出了新的网络结构,包括互穿网络,双网络,双峰网络,混溶异构网络,和deswollen网络的性能的例子。

英文摘要:

The two approaches to analyzing the large strain behavior of rubbery networks are phenomenologically, using strain energy functions drawn from continuum mechanics, and molecular models, which apply statistical mechanics to compute the effect of chain orientation on the entropy. The early rubber elasticity models ignored intermolecular interactions, whereas later developments ("constraint models") included the effect of entanglements or steric constraints on the mechanical stress. These constitutive equations for rubber elasticity are compared to experimental results, and the connection of network elasticity to the relaxation behaviour is discussed. For conventional elastomers there is a compromise between stiffness and strength. Different methods to circumvent this limitation are described. Examples are given of the properties obtained with novel network architectures, including interpenetrating networks, double networks, bimodal networks, miscible heterogeneous networks, and deswollen networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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