Modeling Hydrogen Bonding in Diblock Copolymer/Homopolymer Blends
Modeling Hydrogen Bonding in Diblock Copolymer/Homopolymer Blends
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DOI：
10.1021/ma4008576
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发表时间：
2013-07-23
期刊：
影响因子：
5.5
通讯作者：
Shi, An-Chang
中科院分区：
文献类型：
--
作者：
Dehghan, Ashkan;Shi, An-Chang
AB-二嵌段共聚物和C-均聚物（AB/C）的共混物，其中A和C能够形成氢键，作为模型系统来检查和验证两种方法来模拟氢键对聚合物体系相行为的影响。第一个模型假设空调单体之间的弗洛里-哈金斯参数为负。与实验相比，该吸引相互作用模型定性地再现了正确的相变序列，但未能正确描述c -均聚物的加入引起的层间距变化。第二个模型假设氢键导致A/C络合。聚合物间络合模型准确地预测了强氢键下有序相转变序列和层间间距的减小。聚合物的键合应该用聚合物间络合模型来模拟。结果表明，氢
Blends of AB-diblock copolymers and C-homopolymers (AB/C), in which A and C are capable of forming hydrogen bonds, are used as a model system to examine and validate two approaches for modeling the effects of hydrogen bonding on the phase behavior of polymeric systems. The first model assumes a negative Flory-Huggins parameter between the A/C monomers. This attractive-interaction model reproduces qualitatively correct phase transition sequences as compared with experiments, but it fails to correctly describe the change of lamellar spacing induced by the addition of the C-homopolymers. The second model assumes that hydrogen bonding leads to A/C complexation. The interpolymer-complexation model predicts correctly the order order phase transition sequences and the decrease of lamellar spacing at strong hydrogen bonding. The bonding of polymers should be modeled by the interpolymer-complexation model. results demonstrate that hydrogen