What is BS EN ISO 6721-2:2021?

Introduction

BS EN ISO 6721-2:2021, also known as "Plastics -- Determination of dynamic mechanical properties," is a technical standard developed by the British Standards Institution (BSI) and the International Organization for Standardization (ISO). This standard focuses on the measurement and characterization of the dynamic mechanical properties of plastics.

Scope and Objectives

The main objective of BS EN ISO 6721-2:2021 is to provide a standardized method for determining the dynamic mechanical properties of plastics. These properties refer to how a material responds to mechanical forces in a dynamic or time-dependent manner.

The standard covers a wide range of plastics, including thermoplastics, thermosetting materials, elastomers, and reinforced plastics. It applies to both rigid and flexible materials and can be used for quality control, research and development, and material selection purposes.

Testing Procedures

BS EN ISO 6721-2:2021 outlines various testing procedures to determine the dynamic mechanical properties of plastics. These include:

Tensile tests: This measures the response of a plastic material to an applied tensile force over a range of temperatures.

Bending tests: This assesses the ability of a material to withstand flexural stresses under different conditions.

Torsion tests: This determines how a plastic responds to twisting forces and measures its ability to return to its original shape after deformation.

Shear tests: This evaluates the plastic's resistance to shearing forces and its ability to retain its integrity.

Benefits and Applications

The knowledge of a plastic's dynamic mechanical properties is crucial for several reasons:

Quality control: Manufacturers can use this information to ensure consistent material properties, especially for critical applications where performance and reliability are essential.

Material selection: Engineers can make informed decisions about the suitability of different plastics for specific applications based on their dynamic mechanical properties.

Product development: Understanding how a material behaves under various conditions can aid in the design and optimization of new products.

Research and innovation: Researchers can use these standardized testing procedures to explore new materials and investigate their behavior under dynamic conditions.

Conclusion

BS EN ISO 6721-2:2021 provides a comprehensive framework for determining the dynamic mechanical properties of plastics. By following the standardized testing procedures outlined in this standard, manufacturers, engineers, researchers, and designers can gain valuable insights into the behavior of plastics under different mechanical forces and temperatures. This knowledge can contribute to improved product quality, material selection, and overall innovation in the field of plastics.