Entanglements in Lamellar Phases of Diblock Copolymers

Entanglements in Lamellar Phases of Diblock Copolymers
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二嵌段共聚物层状相中的缠结

DOI:
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发表时间:
2015
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影响因子:
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通讯作者:
V. Ganesan
V. Ganesan
中科院分区:
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文献类型:
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作者:
Vaidyanathan Sethuraman;Dylan Kipp;V. Ganesan

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利用分子动力学(MD)模拟和拓扑分析算法,我们研究了柔性聚合物在两嵌段共聚物有序片层相中的纠缠长度的变化。我们的分析表明,聚合物的平均纠缠间距随着嵌段之间分离程度的增加而减小。此外,拓扑分析算法的结果表明,由于嵌段共聚物的分离形态,缠结结的分布不均匀。为了理解这种趋势,我们引用了Kavassali和Noolandi提出的填充论点,并结合聚合物自洽场理论(SCFT)和蒙特卡罗模拟。这样的分析揭示了与我们的平均纠缠间距和纠缠不均匀性的MD结果定性地相似的特征。总之,我们的结果为量子纠缠特性的变化提供了证据。
Using molecular dynamics (MD) simulations in conjunction with topological analysis algorithms, we investigate the changes, if any, in entanglement lengths of flexible polymers in ordered lamellar phases of diblock copolymers. Our analysis reveals a reduction in the average entanglement spacing of the polymers with increasing degree of segregation between the blocks. Furthermore, the results of the topological analysis algorithms indicate an inhomogeneous distribution of entanglement junctions arising from the segregated morphology of the block copolymer. To understand such trends, we invoke the packing arguments proposed by Kavassalis and Noolandi in combination with the framework of polymer self-consistent-field theory (SCFT) and Monte Carlo simulations. Such an analysis reveals qualitatively similar characteristics as our MD results for both the average entanglement spacing and the inhomogeneities in entanglements. Together, our results provide evidence for the changes in entanglement features arising f...
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