以瓶用聚对苯二甲酸乙二醇酯树脂为研究对象，依据GB 17931-2003测定试样的特性黏度，分析了溶液浓度、溶样温度、溶样时间、溶样搅拌速率等参数对测定结果的影响，并依据JJF 1059.1-2012对测定过程中引入的标准不确定度分量进行了评定。结果表明：影响聚酯切片黏度测量不确定度的最主要因素是溶液浓度，溶样搅拌速率、试样的干燥处理和测量重复性也对测定结果影响较大，溶剂和溶液的流经时间对测定结果的影响较小。

Taking polyethylene terephthalate resin for bottle as the research object, the intrinsic viscosity of the sample was determined according to GB 17931-2003. The effects of solution concentration, sample dissolving temperature, sample dissolving time, sample stirring rate and other parameters on the determination results were analyzed. According to JJF 1059.1-2012 the standard uncertainty component introduced in the determination process was evaluated. The results show that the most important factor affecting the measurement uncertainty of viscosity of polyester chips was the solution concentration. The sample stirring rate, the sample drying treatment and the repeatability of measurement also had a great influence on the determination results. Solvent and solution flowing time had little influence on the determination results.