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以沉淀分级法和体积排斥色谱法(SEC)对聚酯型聚氨酯(PESU)进行了分级和分子量分布的表征,以气相渗透压(VPO)法和小角激光光散射法(SALS)测定了其绝对分子量((0)_w和()_());订定了30℃在二甲基甲酰胺(DMF)中的Mark-Houwinx方程式:[η]=1.61×10~(-4)M~1.36,并由粘度测定结果,讨论了此种高分子在强极性溶液中的分子形态.
The classification and molecular weight distribution of polyester polyurethane (PESU) were characterized by precipitation fractionation and volume exclusion chromatography (SEC). The absolute value of PESU was determined by gas phase osmotic pressure (VPO) and small angle laser light scattering (SALS) Molecular weight ((0) _w and (*)); Mark-Houwinx equation set at 30 ° C in dimethylformamide (DMF): [η] = 1.61 × 10 -4 M ~ 1.36, and from the viscosity measurement results, discussed the polymer in the strong polar solution of the molecular morphology.