标准编号：ISO/TR 20659-2:2024
中文名称：流变试验方法 基本原理和实验室间比对 第2部分：与时间有关的结构变化（触变性）测定
英文名称：Rheological test methods — Fundamentals and interlaboratory comparisons — Part 2: Determination of the time-dependent structural change (thixotropy)
发布日期：2024-03
标准范围
This document gives information on an interlaboratory comparison for the determination of the time- dependent structural change (thixotropy) using rheological test methods. Thixotropy is the reversible, time- dependent decrease of shear viscosity η at a constant shear rate γ？ or shear stress τ.
This document provides examples of fields of application, in which important material properties can be characterized by the thixotropy. These fields of application include: — effectiveness of rheological additives and thixotropic agents, respectively; — stability of the structure at rest (e.g. behaviour when starting to pump); — wet film thickness after processing; — levelling and sagging behaviour (e.g. without brushmarks or sag formation); — orientation of effect pigments.
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