摘要翻译:
用计算机模拟和标度分析方法研究了单一多嵌段AB共聚物在固体平面基底上的吸附。结果表明,该问题可以映射为均聚物的有效吸附问题。特别地,我们讨论了临界吸附能和吸附单体的比例如何依赖于粘附单体的嵌段长度$M$A$和聚合物链的总长度$N$。此外,无规共聚物的吸附也被考虑,并发现在退火近似框架内很好地描述了。为了更好地验证我们的理论预测,我们采用了两种不同的蒙特卡罗模拟方法:a)基于标准Metropolis算法(MA)的离格动态珠簧模型和b)使用可用于超长链测试的剪枝富集Rosenbluth方法(PERM)的粗粒晶格模型,两种方法的结果都与理论预测完全一致。
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英文标题:
《Adsorption of Multi-block and Random Copolymer on a Solid Surface:
Critical Behavior and Phase Diagram》
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作者:
Swati Bhattacharya, Hsiao-Ping Hsu, Andrey Milchev, Vakhtang G.
Rostiashvili, Thomas A. Vilgis
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Soft Condensed Matter 软凝聚态物质
分类描述:Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜,聚合物,液晶,玻璃,胶体,颗粒物质
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
The adsorption of a single multi-block $AB$-copolymer on a solid planar substrate is investigated by means of computer simulations and scaling analysis. It is shown that the problem can be mapped onto an effective homopolymer adsorption problem. In particular we discuss how the critical adsorption energy and the fraction of adsorbed monomers depend on the block length $M$ of sticking monomers $A$, and on the total length $N$ of the polymer chains. Also the adsorption of the random copolymers is considered and found to be well described within the framework of the annealed approximation. For a better test of our theoretical prediction, two different Monte Carlo (MC) simulation methods were employed: a) off-lattice dynamic bead-spring model, based on the standard Metropolis algorithm (MA), and b) coarse-grained lattice model using the Pruned-enriched Rosenbluth method (PERM) which enables tests for very long chains. The findings of both methods are fully consistent and in good agreement with theoretical predictions.
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PDF链接:
https://arxiv.org/pdf/711.3752


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