标准编号：ISO 20965:2021
中文名称：塑料 聚合物熔体瞬时拉伸粘度的测定
英文名称：Plastics — Determination of the transient extensional viscosity of polymer melts
发布日期：2021-04
标准范围
This document specifies the general principles of a method for determining the transient extensional viscosity of polymer melts. The procedure details the measurement of polymer melt specimens stretched uniaxially under conditions of constant strain rate and constant temperature.
The method is capable of measuring the transient extensional viscosity of polymer melts at Hencky –1 –1 strain rates typically in the range 0,01 s to 1 s , at Hencky strains up to approximately 4 and at temperatures up to approximately 250 °C (see NOTEs 1 and 2). It is suitable for measuring transient 4 7 extensional viscosity values typically in the range from approximately 10 Pa⋅s to 10 Pa⋅s (see NOTE 3).
立即下载标准文件