通过原子转移自由基聚合（ATRP）制备的两亲性聚苯乙烯-b-聚（甲基丙烯酸钠）嵌段共聚物的亲/疏嵌段长度对其流变性能的影响。

The effect of hydrophilic and hydrophobic block length on the rheology of amphiphilic diblock Polystyrene-b-Poly(sodium methacrylate) copolymers prepared by ATRP.

机构信息

Department of Chemical Engineering, Product Technology, Nijenborgh 4, 9747 AG Groningen, The Netherlands; Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands.

Electron Microscopy, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands.

出版信息

J Colloid Interface Sci. 2014 Aug 15;428:152-61. doi: 10.1016/j.jcis.2014.04.047. Epub 2014 May 2.

DOI:10.1016/j.jcis.2014.04.047

PMID:24910048

Abstract

Following our previous investigation on the effect of molecular architecture on the rheology of Polystyrene-b-Poly(sodium methacrylate) copolymers (PS-b-PMAA), we consider here diblock PS-b-PMAA copolymers characterized by a different length of either the hydrophilic or the hydrophobic block. Various copolymers characterized by different PS or PMAA block length have been prepared by ATRP (kinetics is also discussed) and studied from the point of view of their rheological behaviour in water. To the best of our knowledge, this is the first systematic investigation concerning the effect of block length on the rheology of diblock polyelectrolytes. We found that the hydrophobic block length has small influence on the rheology. Surprisingly, the polymers with shortest PMAA blocks yield the strongest gels at high concentration. A simple model based on the classical theories of self-assembly and percolation of amphiphilic polymers has been here developed in order to explain the observed data.

摘要

继我们先前对聚苯乙烯-b-聚（甲基丙烯酸钠）共聚物（PS-b-PMAA）的分子结构对其流变性能的影响的研究之后，我们在这里考虑了具有不同亲水性或疏水性链段长度的两嵌段 PS-b-PMAA 共聚物。通过 ATRP（也讨论了动力学）制备了具有不同 PS 或 PMAA 链段长度的各种共聚物，并从其在水中的流变行为的角度进行了研究。据我们所知，这是首次系统地研究嵌段长度对两嵌段聚电解质流变性能的影响。我们发现，疏水性链段长度对流变性能的影响很小。令人惊讶的是，具有最短 PMAA 链段的聚合物在高浓度下会产生最强的凝胶。为了解释所观察到的数据，我们在这里开发了一个基于两亲聚合物自组装和渗流的经典理论的简单模型。