两亲聚合物表面的反相气相色谱分析

采用反相气相色谱探针技术研究了苯乙烯－氧乙烯－苯乙烯三嵌段两亲聚合物的表面物理化学性质。包括表面吸附热力学函数，表面能的色散分量以及表面分子链与探针的分子间相互作用，。探讨了共聚物中亲油性链段聚苯乙烯（PS）和亲水性链段聚氧乙烯（PEO）的组成比例与其表面性质的关系。结果表明共聚物表面组成中随PEO含量的增加，其表面能增大，表面分子链与探针分子的相互作用增强，表面吸附能力也增强。

Analysis of Surface Property of Amphiphilic Polymer by Inverse Phase Gas Chromatography

The surface physico-chemical property of the triblock amphiphilic copolymers, poly(styrene)-poly(ethyleneoxide)- poly(styrene)(SEOS), was studied by using inverse phase gas chromatographic probe technique. The propertie s included thermodynamic function of surface adsorption, dispersive component o f the surface energy(rds) and thermodynamic interaction between SEOS an d solvent with different chemical nature. The relation between surface property and relative content of the lipophilic polystyrene and the hydrophilic poly(ethy lene oxide) in molecule-chain of copolymer was examined. The result showed tha t rds of SEOS was lower than that of polyethylene glycol (PEG), and in creased as the ethylene oxide content increased in SEOS copolymers. The surface adsorpti on and thermodynamic interaction with probe were also increased with the increa se of ethylene oxide content in SEOS.