SOME IDEAS CONCERNING THE ELASTICITY OF BIO-POLYMER NETWORKS
SOME IDEAS CONCERNING THE ELASTICITY OF BIO-POLYMER NETWORKS
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DOI：
10.1021/ma00195a073
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发表时间：
1989-05-01
期刊：
影响因子：
5.5
通讯作者：
BALL, RC
中科院分区：
文献类型：
--
作者：
HIGGS, PG;BALL, RC
我们考虑一个由柔性链组成的网络，它可以通过从一个紧凑的源中拉出更多的链来增加它们的长度。这模拟了在许多生物聚合物系统中存在的螺旋结区的应变下的部分解旋。(We借鉴了西成等人的观点，但得出了完全不同的结论。）根据高斯网络的标准仿射变形理论的假设，我们证明了该网络在> 2.3的延伸比时本质上是不稳定的，其中结区将发生完全解旋。我们发现，在这个网络中的低功能结是相对不稳定的，并且会有一种趋势，某些链完全崩溃，导致形成的高有效功能的连接区的数量减少。我们研究的影响，扩大不灵活的交界区的网络弹性。据发现，交界区必须是大的比较，在任何实质性的差异，从一个纯粹的高斯网络与简单的交联的模量发生之前，连接的柔性链的长度。
We consider a network composed of flexiblechains which may increase their length by pulling more chain from a compact source. This models the partial unwinding under strain of the helical junction zones which exist in many biopolymer systems.(We draw on the ideas of Nishinari et al. but reach completely different conclusions.) Following the assumptions of the standard affine deformation theory of Gaussian networks, we show that this network will be intrinsically unstable at extension ratios of> 2.3, where complete unwinding of the junction zones will occur. We find that low functionality junctions in this network are relatively unstable and that there will be a tendency for certain chains to collapse completely, leading to the formation of a reduced number of junction zones of high effective functionality. We investigate the effects of extended inflexible junction zones on the network elasticity. It is found that the junction zones must be large in comparison to the length of the connecting flexible chains before any substantial difference in the modulus occurs from that of a purely Gaussian network with simple cross-links.