对扩大粘度基准量程作了研究 ,包括高粘度标准物质 (聚异丁烯 )性能及定值方法 ,特别是高粘度物质在毛细管法中残留量影响的研究。通过研究使粘度基准量程提高了一个数量级 ,从 1× 10 5mm2 /s提高到 1×10 6mm2 /s。该量程基准的测量不确定度为 0 7%～ 1% ,达到国际先进水平 The research on expanding the reference range of viscosity, including the properties of high viscosity reference material (polyisobutylene) and the method of setting value, especially the study on the influence of high viscosity material in the capillary method. Through research, the viscosity reference range was increased by one order of magnitude, from 1 × 10 5 mm 2 / s to 1 × 10 6 mm 2 / s. The measurement uncertainty of the benchmark is 0 7% ~ 1%, reaching the international advanced level