Conformational properties of blends of cyclic and linear polymer melts.
Conformational properties of blends of cyclic and linear polymer melts.
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环状和线性聚合物熔体共混物的构象特性。
DOI：
10.1103/physreve.77.011801
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
S. Shanbhag
中科院分区：
文献类型：
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作者：
G. Subramanian;S. Shanbhag
提出了一种改进的退火算法来识别环状聚合物熔体的原始路径。该算法确保了非级联环的原始路径长度为零，并且没有观察到纠缠。用键涨落模型模拟了N=150和300单体的环状线型共混物。原始路径长度和线性组分的平均缠结数被发现是独立的共混物组成。相比之下，原始路径长度和平均纠缠数的环分子的线性链的分数增加近似线性，并为大N，他们接近的值可比的线性链。通过线性链的环分子的线程，和环-环的相互作用中观察到的线性链的存在下。它被证实，对于大N，这些后者的相互作用促进形成一个纠缠网络，从而导致不成比例的动力学过程的延迟。
An adapted version of the annealing algorithm to identify primitive paths of a melt of ring polymers is presented. This algorithm ensures that the primitive path length becomes zero for nonconcatenated rings, and that no entanglements are observed. The bond-fluctuation model was used to simulate ring-linear blends with N=150 and 300 monomers. The primitive path length and the average number of entanglements of the linear component were found to be independent of the blend composition. In contrast, the primitive path length and the average number of entanglements on a ring molecule increased approximately linearly with the fraction of linear chains, and for large N , they approached values comparable with linear chains. Threading of ring molecules by linear chains, and ring-ring interactions were observed only in the presence of linear chains. It is conjectured that for large N , these latter interactions facilitate the formation of a percolating entangled network, thereby resulting in a disproportionate retardation of the dynamical processes.