GPC法测定墨粉用聚酯树脂分子质量及其分布

Determination of molecular weight and its distribution of polyester resin for toner by GPC

采用GPC凝胶色谱法测定了墨粉用聚酯树脂相对分子质量及其分布，考察了样品质量浓度在0．004～0．016g／mL变化对测定结果的影响，以及溶解时间对测定结果的影响。结果表明：随着质量浓度的增加，测得相对分子质量和分散性先增加后减小。在相同的测试条件下，随着溶解时间的延长，分子质量和分散性先增大，后趋于稳定。

The molecular weight and its distribution of polyester resin for toner were determinated by GPC. The effects of sample mass concentration in 0.004-0.016 g/mL and solution time on the test results were investigated. The result showed that the molecular weight and dispersion were increased firstly and then decreased with the increasing of polyester resin mass concentration. Under the same test conditions, both the molecular weight and dispersion were increased firstly and then stabilized.