Lattice Cluster Theory for Pedestrian. 2. Random Copolymer Systems
Lattice Cluster Theory for Pedestrian. 2. Random Copolymer Systems
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DOI：
10.1021/ma991747g
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发表时间：
2000-04
期刊：
影响因子：
5.5
通讯作者：
Jacek Dudowicz and;K. Freed
中科院分区：
文献类型：
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作者：
Jacek Dudowicz and;K. Freed
针对 AxB1-x/CyD1-y、AxB1-x/AyB1-y 和 A/CyD1-y 无规共聚物二元共混物开发了无规共聚物 Flory−Huggins (FH) 理论的分析上易于处理、更现实的扩展。该理论根据联合原子团之间的相互作用描述了聚合物-聚合物相互作用，并包括对有效相互作用参数 χ 的与温度无关的贡献 χs 。 χs 由晶格簇理论在不可压缩、无热、完全柔性、长链极限下确定（无可调参数）。对于降冰片烯-乙烯共聚 (NxE1-x/NyE1-y) 无规共聚物混合物，说明了相互作用参数 χ 的通用、易于应用的表达式，Delfolie 等人已成功使用该理论。 (Macromolecules 1999, 32, 7781) 解释与经典随机共聚物 FH 理论预测显着不同的混溶性数据。进一步的插图描述了链半柔性和序列依赖性对错误的影响...
An analytically tractable, more realistic extension of random copolymer Flory−Huggins (FH) theory is developed for AxB1-x/CyD1-y, AxB1-x/AyB1-y, and A/CyD1-y random copolymer binary blends. The theory describes the polymer−polymer interactions in terms of the interactions between united atom groups and includes a temperature-independent contribution χs to the effective interaction parameter χ. χs is determined (with no adjustable parameters) from the lattice cluster theory in the incompressible, athermal, fully flexible, long-chain limit. The general, readily applied expressions for the interaction parameter χ are illustrated for norbornene-co-ethylene (NxE1-x/NyE1-y) random copolymer mixtures for which the theory has been successfully used by Delfolie et al. (Macromolecules 1999, 32, 7781) to explain miscibility data that depart significantly from the predictions of classic random copolymer FH theory. Further illustrations describe the influence of chain semiflexibility and sequence dependence on the mis...