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在不同外加水压下作者等用毛细管粘度计测定了聚甲基丙烯酸甲酯五个分级试样的苯溶液粘度,并用光散射法在丙酮溶液中测定了重均分子量,得到下列特性粘数、分子量关系式(25°)。不加外压时:[η]=3.80×10~(-3)M~(0.79)毫升/克S_R=55达因/厘米~2:[η]_s=12.6×10~(-3)M~(0.70)D_R=5000秒~(-1):[η]_D=8.37×10~(-3)M~(0.73) 适用于分子量范围0.2—4.5×10~6。并指出用实验数据验证性粘数理论时,α值的切变速度依赖性有重要的影响。粘度数据中斜度系数 k′或β值,无论对 S_R 或 D_R 都没有显著的影响,与前人的结果有不同。对光散射测定所用仪器加以叙述并从光散射数据得到了试样的 A_2和<~2>_z 的数值。
Under different external pressures, the authors used the capillary viscometer to measure the benzene solution viscosity of the five graded samples of polymethylmethacrylate and measured the weight average molecular weight by the light scattering method in the acetone solution to obtain the following intrinsic viscosity numbers, Molecular weight relation (25 °). Without external pressure: [η] = 3.80 × 10 -3 M ~ 0.79 ml / g S_R = 55 dynes / cm 2: [η] _s = 12.6 × 10 -3 M ~ (0.70) D_R = 5000 s -1: [η] _D = 8.37 × 10 -3 M ~ (0.73) is suitable for the molecular weight range of 0.2-4.5 × 10 -6. It is pointed out that there is an important influence on the shear rate dependence of the α value when using the experimental data of the confirmatory viscosity theory. The slope factor k ’or β in the viscosity data has no significant effect on S_R or D_R, which is different from previous results. The instruments used for light scattering measurements are described and the A_2 and <~ 2> _z values of the samples are obtained from the light scattering data.