Tuning Solvent Quality Induces Morphological Phase Transitions in Miktoarm Star Polymer Films
Tuning Solvent Quality Induces Morphological Phase Transitions in Miktoarm Star Polymer Films
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DOI：
10.1021/acs.macromol.0c00770
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发表时间：
2020-07
期刊：
影响因子：
5.5
通讯作者：
Zerihun G. Workineh;G. Pellicane;M. Tsige
中科院分区：
文献类型：
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作者：
Zerihun G. Workineh;G. Pellicane;M. Tsige
用粗粒分子动力学模拟方法研究了(AN)k-C-(Bn)k星形聚合物在溶液中的有序性和自组装动力学，最终目的是发展对这些体系的预测能力。通过系统地改变一个嵌段的相对溶剂-嵌段相互作用，结合一侧限制衬底和另一侧限制水蒸气的影响，我们观察到了在没有溶剂的情况下固有的层状分子臂星形聚合物的一些有趣的形态。此外，我们还发现混合臂星形聚合物在溶液中的自组装动力学与线型嵌段共聚物的自组装动力学完全不同。本研究的结果可用于定制MICTOARM星形聚合物的薄膜形态，在指导实验者为不同类型的应用设计此类材料方面发挥了主导作用。
The ordering and kinetics of self-assembly of miktoarm star polymers of the form (An)k–C–(Bn)k in solution and confined between two surfaces are investigated using a coarse-grained molecular dynamics simulation, with the ultimate goal of developing predictive capabilities for these systems. By systematically changing the relative solvent-block interaction for one block, combined with the effect of confining substrate on one side and vapor on the other side, we observed a number of interesting morphologies for an inherently lamellar miktoarm star polymers in the absence of solvent. Furthermore, we also found that in solution the self-assembly kinetics of miktoarm star polymers into cylindrical and lamellar morphologies is completely different from the self-assembly kinetics of linear block copolymers. The findings from the present study can be used to tailor the film morphology of miktoarm star polymers, playing a leading role in guiding the experimentalists for designing this class of materials for different types of applications.