GB/T 40384-2021 "Plastics—Determination of the transient extensional viscosity of polymer melts"

GB/T 40384-2021 "Determination of Transient Tensile Viscosity of Plastic Polymer Melts" regulates the determination method of transient tensile viscosity of plastic polymer melts. The standard specifies the test principle, equipment, operation process and data processing, and details the requirements of each link from sample preparation to result calculation. It provides a unified technical standard for accurately measuring the viscosity characteristics of polymer melts under tensile flow state, which is conducive to in-depth research on the rheological performance of plastic materials.

This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.