高分子混合物低至极稀浓度区间时的溶液粘度

测量了聚苯乙烯－聚（２，６－二甲基－１，４苯醚）混合物低至极稀浓度区间的甲苯溶液的粘度，以求更深入地了解链间相互作用对高分子混合物溶液粘度行为的影响。将高分子混合物视为单一溶质，先定量消除粘度测量中器壁效应的干扰，可以得到可靠２的混合物粘数据。混合物中异物高分子间的特殊相互作用的存在，可以用测量得到的特性粘数和总表观缔合常数相互对于高分子理想混合的理论预测的偏离来判定。

SOLUTION VISCOSITY OF POLYMER MIXTURE DOWN TO THE EXTREMELY DILUTE CONCENTRATION REGION

The relative viscosities of polystyrene_poly(2,6_dimethyl_1,4_phenylene oxide) mixtures in toluene down to extremely dilute concentration region were measured in an attempt to get a more exact understanding of the effect of interchain interaction on the viscometrical behavior of polymer mixture solution. Regarding the polymer mixture as a single solute, the interference of wall effect on viscosity measurement was eliminated in a quantitative way first for getting reliable viscosity data of the mixture. The existence of special interaction between unlike polymers in the mixture could be detected by the deviation of the measured intrinsic viscosity and overall apparent association constant from the predicted values for ideal polymer mixture.