聚丁二酸丁二醇酯切片端羧基滴定方法优化  

Measurement optimization of carboxyl end group content in PBGS

作　　者：王新良[1] 甘胜华[2] 冯静[1] 王秀筠[1] 汪少朋[1] 

机构地区：[1]中国纺织科学研究院,北京100025 [2]上海聚友化工有限公司,上海201508

出　　处：《聚酯工业》2012年第4期20-22,共3页Polyester Industry

摘　　要：采用化学试剂滴定的方法测定聚丁二酸丁二醇酯切片的端羧基值,对溶剂的配比、滴定溶剂选择、指示剂的选择等影响因素进行条件试验。研究发现,用氯仿作为溶剂,以0.05 mol/L的NaOH-乙醇溶液作为滴定剂,以百里香酚蓝作指示剂,滴定终点颜色由黄色变为蓝色,颜色变化明显,平行性和准确性都很好。The measurement of carboxyl end group content in PBGS was discussed by a chemical titration method. The orthogonal optimization of testing conditions was studied, such as volume proportion of dissolving solvent, titration solvent, indicator. The results showed that ： the optimum solvent is Chloroform and concentration of NaOH/ethanol solution O. 05 mol/L was used as titrant. Bromophenol blue was indicator. Yellow changing to blue was used as the end of titration. It had good accuracy and parallelism.

关 键 词：聚丁二酸丁二醇酯 端羧基值 滴定法 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]