PET中齐聚物总量及环三聚体含量测定法

Determination of the Total Oligomers and Content of Cyclic Trioligomer in PET

本方法用三氟醋酸作溶剂,溶解聚对苯二甲酸乙二醇酯(以下简称PET),用丙酮氯仿混合溶液和水作沉淀剂,重量法测得齐聚物总含量。用日本CS-910双波长薄层色谱扫描仪测得环三聚体含量。

First, PET is dissolved in trifluoroacetic acid. The polymer is then preciptitated by the mixture of chloroform and acetone in water. The total amount of oligomer are measured by the gravimeter method. The content of cyclic triligomer is measured with Shimadzer Dual-Wavolongth Thin-Layer Chromatogram Scanner Model CS-910.