Osmotic Pressure of Semidilute Solutions of Branched Polymers
Osmotic Pressure of Semidilute Solutions of Branched Polymers
复制标题
支化聚合物半稀溶液的渗透压
DOI：
10.1295/polymj.15.367
复制
发表时间：
1983
期刊：
影响因子：
2.8
通讯作者：
I. Noda
中科院分区：
文献类型：
--
作者：
Y. Higo;N. Ueno;I. Noda
在很宽的浓度范围内测量了支化聚合物在良好溶剂中的渗透压。研究了两种类型的支化聚合物，星形聚(α-甲基苯乙烯)S具有三个支化和梳状聚苯乙烯具有15-16个支化。利用标度律对数据进行了分析。具有三个支链的星形聚合物和相应的线形聚合物的折合渗透压的差异是由于回转半径的不同造成的。在具有许多支链的支化聚合物中，由于高链段密度，存在排除其他分子的链段的区域。
Osmotic pressures for branched polymers in a good solvent were measured over a wide range of concentrations. Two types of branched polymers, star-shaped poly(α-methylstyrene)s having three branches and comb-shaped polystyrenes having 15—16 branches, were studied. The data were analyzed using the scaling law. The difference in the reduced osmotic pressure between star-shaped polymers having three branches and the corresponding linear polymers results from the difference in radii of gyration. In branched polymers having many branches, there is a region from which the segments of other molecules are excluded as a result of high segment density.