浅谈瓶片端羧基值测试方法的修改

Introduction of the test method revision of bottle grade PET chip carboxyl end group value

从方法选择,样品制备,溶剂选择,样品调节,样品溶解条件,称样量,标准溶液的浓度,适用范围、精密度和偏差等方面对瓶用PET树脂国标的端羧基值分析方法各操作细节进行了研究,提出了国标修订的建议。

In this paper, various operational details of the bottle grade PET chip carboxyl end group value national standard analysis methods are studied from the aspects sample regulation, sample dissoluti precision and deviation. Proposals such as method choice, sample preparation, solvent selection, on condition, sample mass, concentration of standard solution, application scope, for revision of national standard were put forward.