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引用次数: 0
摘要
我们基于两种拓扑结构分析了复杂共聚物大分子的普遍构象特性:一种是包含 fc 线性分支和接枝到中心核的 fr 闭环的莲座状结构;另一种是对称的 pom-pom 结构,由一条主干线性链和两个具有 f 功能的分支点组成。我们假设这些结构的组成链(分支)可以是两种不同的化学物质 a 和 b。根据溶剂条件的不同,某些链节的链间或链内相互作用可能消失,这相当于相应聚合物的 Θ 状态。 应用直接聚合物重正化框架内的分析方法和基于聚合物晶格模型的数值模拟,我们评估了表征两种复杂拓扑结构各组成部分尺寸特性的参数集,并定量估计了各组成部分之间的相互作用对这些尺寸特性的影响。
Universal properties of branched copolymers in dilute solutions
We analyze the universal conformational properties of complex copolymer macromolecules, based on two topologies: the rosette structure containing fc linear branches and fr closed loops grafted to the central core, and the symmetric pom-pom structure, consisting of a backbone linear chain terminated by two branching points with functionalities f. We assume that the constituent strands (branches) of these structures can be of two different chemical species a and b. Depending on the solvent conditions, the inter- or intrachain interactions of some links may vanish, which corresponds to Θ-state of the corresponding polymer species. Applying both the analytical approach within the frames of direct polymer renormalization and numerical simulations based on the lattice model of polymer, we evaluated the set of parameters characterizing the size properties of constituent parts of two complex topologies and estimated quantitatively the impact of interactions between constituent parts on these size characteristics.
期刊介绍:
Condensed Matter Physics contains original and review articles in the field of statistical mechanics and thermodynamics of equilibrium and nonequilibrium processes, relativistic mechanics of interacting particle systems.The main attention is paid to physics of solid, liquid and amorphous systems, phase equilibria and phase transitions, thermal, structural, electric, magnetic and optical properties of condensed matter. Condensed Matter Physics is published quarterly.