Polymeric Micelles Formed by Splitting of Micellar Cluster

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• 作者：Dinghai Xie ; Wei Bai ; Kui Xu ; Ruke Bai ; Guangzhao Zhang
• 刊名：Journal of Physical Chemistry B
• 出版年：2007
• 出版时间：July 19, 2007
• 年：2007
• 卷：111
• 期：28
• 页码：8034 - 8037
• 全文大小：252K
• 年卷期：v.111,no.28(July 19, 2007)
• ISSN：1520-5207

文摘

Polystyrene-b-poly(acrylic acid) (PS-b-PAA) diblock copolymer chains form aggregates with bimodaldistribution in toluene. The introduction of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) chains leads tothe formation of mixed micellar cluster due to the hydrogen-bonding complexation between PAA and PEO.By using laser light scattering and transmission electron microscopy, we have investigated the structuralevolution of the mixed micellar cluster. As the standing time increases, the cluster split into regular complexmicelles composed of PS-b-PAA and PS-b-PEO chains. Our results reveal that the hydrogen-bondingcomplexation between PAA and PEO in the core and the repulsion between PS chains in the corona as afunction of the molar ratio (r) of PEO to PAA manipulate the evolution.