Predicting the solution morphology of a sulfonated pentablock copolymer in binary solvent mixtures
Predicting the solution morphology of a sulfonated pentablock copolymer in binary solvent mixtures
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预测二元溶剂混合物中磺化五嵌段共聚物的溶液形态
DOI：
10.1002/polb.23914
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
K. Winey
中科院分区：
文献类型：
--
作者：
Philip J. Griffin;Grace B. Salmon;Jamie T Ford;K. Winey
使用小角X射线散射表征了中间嵌段磺化五嵌段共聚物在可混溶的极性/非极性溶剂共混物中的溶液形态作为溶剂组成和聚合物浓度的函数。在改变溶剂共混物的组成时观察到三种不同的溶液形态。在低重量分数的极性溶剂下，观察到球形的磺化核胶束，而在高重量分数的极性溶剂下观察到球形的磺化冠状（倒置）胶束。在极性溶剂的中间浓度下观察到聚合物溶液散射。此外，发现磺化核心胶束的特征尺寸在溶剂共混物组成变化时强烈变化，表明这些溶液以及相应的聚合物膜的形态和性质可以通过溶剂共混物化学的简单变化来调节。我们证明，这些复杂的五嵌段共聚物/二元溶剂共混物的溶液形态和特征胶束尺寸可以可靠地预测通过考虑每个聚合物嵌段和溶剂共混物使用的汉森溶解度参数的相对相互作用。© 2015 Wiley Periodicals，Inc. J. Polym.科学，部分B：聚合物物理学2016，54，254-262
The solution morphologies of a midblock‐sulfonated pentablock copolymer in miscible polar/nonpolar solvent blends were characterized as a function of solvent composition and polymer concentration using small angle X‐ray scattering. Three distinct solution morphologies are observed upon changing the composition of the solvent blend. At low weight fractions of polar solvent, spherical, sulfonated‐core micelles are observed, while spherical, sulfonated‐corona (inverted) micelles are observed at high weight fractions of polar solvent. Polymer solution scattering is observed at intermediate concentrations of polar solvent. Additionally, the characteristic dimensions of the sulfonated‐core micelles were found to change strongly upon variation of the solvent blend composition, indicating that these solutions—and correspondingly the morphology and properties of polymer membranes into which they are cast—can be tuned through simple variations in the solvent blend chemistry. We demonstrate that the solution morphologies and the characteristic micelle dimensions of these complex pentablock copolymer/binary solvent blends can be reliably predicted by considering the relative interactions of each polymer block and the solvent blend using the Hansen solubility parameters. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 254–262