PD CEN ISO/TR 20659-2:2024 - Rheological Test Methods

Welcome to the future of rheological testing with the PD CEN ISO/TR 20659-2:2024 standard. This comprehensive document is your gateway to understanding the intricate world of rheology, focusing on the determination of time-dependent structural changes, commonly known as thixotropy. Released on October 11, 2024, this standard is a must-have for professionals and researchers in the field of material science and engineering.

Overview

The PD CEN ISO/TR 20659-2:2024 standard provides a detailed framework for conducting rheological tests, emphasizing the fundamentals and interlaboratory comparisons. It is designed to guide you through the process of determining thixotropy, a critical property of many materials that exhibit time-dependent changes in their structure under stress.

Key Features

• Standard Number: PD CEN ISO/TR 20659-2:2024
• Pages: 44
• Release Date: October 11, 2024
• ISBN: 978 0 539 32159 3
• Status: Standard

Why Choose This Standard?

Understanding thixotropy is crucial for industries ranging from pharmaceuticals to construction. This standard offers:

• Comprehensive Guidance: Detailed methodologies for conducting rheological tests, ensuring accurate and reliable results.
• Interlaboratory Comparisons: Insights into how different laboratories can achieve consistent results, enhancing the reliability of your findings.
• Fundamental Principles: A deep dive into the principles of rheology, providing a solid foundation for both new and experienced professionals.

Applications

The PD CEN ISO/TR 20659-2:2024 standard is applicable across a wide range of industries, including:

• Pharmaceuticals: Understanding the flow properties of gels and creams.
• Food and Beverage: Analyzing the texture and stability of sauces and dressings.
• Construction: Evaluating the workability of concrete and other building materials.
• Cosmetics: Assessing the spreadability and stability of lotions and creams.

Benefits of Understanding Thixotropy

Thixotropy is a phenomenon where a material becomes less viscous over time when subjected to shear stress and recovers its viscosity when the stress is removed. Understanding this behavior is essential for:

• Product Development: Designing products with desired flow properties.
• Quality Control: Ensuring consistency and performance of products.
• Process Optimization: Improving manufacturing processes by understanding material behavior under stress.

Structure of the Standard

The document is structured to provide a logical flow of information, starting with the basic principles of rheology and progressing to more complex interlaboratory comparisons. With 44 pages of in-depth content, it serves as both a reference and a practical guide for conducting rheological tests.

Who Should Use This Standard?

This standard is ideal for:

• Researchers: Conducting studies on material properties and behavior.
• Quality Assurance Professionals: Ensuring product consistency and performance.
• Engineers: Designing processes and products that require precise control of material properties.
• Educators: Teaching the principles of rheology and its applications.

Conclusion

The PD CEN ISO/TR 20659-2:2024 standard is an invaluable resource for anyone involved in the study or application of rheology. By providing a comprehensive framework for understanding and measuring thixotropy, it empowers professionals to make informed decisions, optimize processes, and innovate with confidence. Whether you're in pharmaceuticals, food, construction, or cosmetics, this standard is your key to mastering the complexities of material behavior.

PD CEN ISO/TR 20659-2:2024

This standard PD CEN ISO/TR 20659-2:2024 Rheological test methods. Fundamentals and interlaboratory comparisons is classified in these ICS categories:

• 87.040 Paints and varnishes

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 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.