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采用分子动力学方法研究了平板聚两性离子刷的表面相行为.考察了不同价态反离子存在时,聚两性离子刷表面形貌随静电相互作用强度的演化.当静电作用逐渐增强时, 3种模拟系列下两性离子刷都发生微相分离形成了钉扎状胶束结构.结合刷高、密度分布函数和主链单体对关联函数,分析了胶束尺寸和胶束内粒子堆积状态的变化.通过统计反离子在刷内的4种状态,揭示了单价和多价反离子在诱导聚两性离子刷相结构上的差异. 相似文献
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In the weak segregation limit,the structure evolution of the hexagonal cylindrical phase of diblock copolymers in films was investigated.Employing the Landau-Brazovskii mean field theory,we obtained three amplitude parameters as functions of temperature,surface field strength and film thickness.By controlling confinement size and surface field strength, lamellae and undulated lamellae appear in the cylindrical bulk phase of diblock copolymers."Phase diagrams"of confinement-induced structures are construc... 相似文献
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