Interfacial Segregation ofHyper-branched Polystyrene in Mixtures of Linear Component
Interfacial Segregation ofHyper-branched Polystyrene in Mixtures of Linear Component
复制标题
线性组分混合物中超支化聚苯乙烯的界面偏析
DOI：
10.14723/tmrsj.32.231
复制
发表时间：
2013
期刊：
影响因子：
5.5
通讯作者：
T. Nagamura
中科院分区：
文献类型：
--
作者：
Hironori Atarashi;Fumi Ariura;K. Akabori;Akihiro Tanaka;M. Ozawa;Keiji Tanaka;T. Nagamura
为了研究聚合物结构对聚合物混合物中表面偏析的影响，利用动态二次离子质谱法沿垂直于表面的方向检测了由超支化聚苯乙烯（HBPS）和氘代线性聚苯乙烯组成的薄膜中的浓度分布。使用了具有两种不同端基（如氢和二硫代氨基甲酸酯）的HBPS（HBPS - H和HBPS - DC）。HBPS - H优先在表面和基底界面处偏析，而HBPS - DC仅分配到基底界面。这些结果可以用构象熵罚和链端在表面的定位来解释。
To study an effect of polymer architecture on surface segregation in polymer mixtures, concentration profile in films composed of hyper-branched polystyrene (HBPS) and deuterated linear polystyrene was examined along the direction normal to the surface by dynamic secondary ion mass spectroscopy. HBPS with two different end groups such as hydrogen and dithiocarbamate (HBPS-H and HBPS-DC) were used. While HBPS-H was preferentially segregated at both surface and substrate interface, HBPS-DC was partitioned only to the substrate interface. These results can be explained in terms of conformational entropic penalty and chain end localization at the surface.