聚丙烯酸丁酯-三氯甲烷稀溶液的性质

THE DILUTE SOLUTION PROPERTIES OF POLY (BUTYL-ACRYLATE) IN CHLOROFORM

用小角激光光散射、膜渗透压、高效体积排斥色谱及粘度技术,研究了聚丙烯酸丁酯-三氯甲烷体系的稀溶液性质。订定了该溶液体系在25℃时的极限粘数与分子量关系武,估算了分子链的无扰尺寸。高效体积排斥色谱数据表明,聚丙烯酸丁酯与聚苯乙烯不遵从流体力学体积普适标定关系。这可能是交联聚苯乙烯凝胶对前者有轻微的吸附作用所致。

The dilute solutien properties of poly (butyl-acrylate) have been studied by means of low angle laser light scattering, membrane osmometry, high performance size exclusion chromatography (HPSEC) and viscosity. The limiting viscosity number-molecular weight relationship of this polymer in chloroform at 25℃ has been determined. The value of unperturbed dimension of molecular chain has been estimated. The data of HPSEC show that both PBA and PS do not obey the universal hydrodynamic volume calibration curve This may be due to the action of adsorption, to some extent, the PBA on the cross-linking polystyrene gel.