BS EN ISO 6721-3:2021: Plastics - Determination of Dynamic Mechanical Properties

Welcome to the comprehensive guide on the BS EN ISO 6721-3:2021 standard, a crucial document for professionals in the plastics industry. This standard provides a detailed methodology for determining the dynamic mechanical properties of plastics through flexural vibration using the resonance-curve method. Released on April 26, 2021, this standard is an essential tool for ensuring the quality and performance of plastic materials in various applications.

Overview of BS EN ISO 6721-3:2021

The BS EN ISO 6721-3:2021 standard is part of a series of standards that focus on the dynamic mechanical analysis of plastics. This particular document outlines the procedures for measuring the flexural vibration properties of plastics, which are critical for understanding how these materials will perform under dynamic conditions. The resonance-curve method described in this standard is a precise technique that allows for the accurate determination of mechanical properties such as modulus and damping characteristics.

Key Features

• Standard Number: BS EN ISO 6721-3:2021
• Pages: 20
• Release Date: April 26, 2021
• ISBN: 978 0 539 12193 3
• Status: Standard

Importance of Dynamic Mechanical Analysis

Dynamic mechanical analysis (DMA) is a powerful technique used to study and characterize materials. It provides insights into the viscoelastic behavior of plastics, which is essential for predicting how these materials will behave under various conditions. The BS EN ISO 6721-3:2021 standard specifically addresses the flexural vibration aspect of DMA, offering a method to evaluate the material's response to oscillatory stress.

Understanding the dynamic mechanical properties of plastics is crucial for several reasons:

• Performance Prediction: By analyzing the mechanical properties, manufacturers can predict how a plastic material will perform in real-world applications, ensuring reliability and safety.
• Material Selection: Engineers and designers can use the data obtained from this standard to select the most suitable materials for specific applications, optimizing performance and cost-effectiveness.
• Quality Control: The standard provides a benchmark for quality control, helping manufacturers maintain consistent product quality and meet industry standards.

Resonance-Curve Method

The resonance-curve method is a sophisticated technique used to determine the dynamic mechanical properties of plastics. This method involves subjecting a plastic specimen to flexural vibration and measuring its response. The resulting data is used to construct a resonance curve, which provides valuable information about the material's modulus and damping characteristics.

The resonance-curve method is particularly advantageous because it allows for:

• High Sensitivity: The method is highly sensitive to changes in material properties, making it ideal for detecting subtle differences between samples.
• Non-Destructive Testing: As a non-destructive testing method, it preserves the integrity of the sample, allowing for further analysis if needed.
• Comprehensive Analysis: It provides a comprehensive analysis of the material's behavior under dynamic conditions, offering insights that static tests cannot provide.

Applications of BS EN ISO 6721-3:2021

The BS EN ISO 6721-3:2021 standard is applicable across a wide range of industries where plastics are used. Some of the key applications include:

• Automotive Industry: In the automotive sector, understanding the dynamic mechanical properties of plastics is essential for designing components that can withstand the stresses of operation, such as vibration and impact.
• Construction: In construction, plastics are used in various applications, from insulation to structural components. This standard helps ensure that these materials meet the necessary performance criteria.
• Consumer Goods: For consumer products, the standard ensures that plastic components are durable and reliable, enhancing product quality and customer satisfaction.
• Electronics: In electronics, plastics are used for housings, connectors, and other components. The standard helps in selecting materials that can endure thermal and mechanical stresses.

Conclusion

The BS EN ISO 6721-3:2021 standard is an invaluable resource for professionals in the plastics industry. By providing a detailed methodology for determining the dynamic mechanical properties of plastics, it helps ensure that materials meet the necessary performance standards for a wide range of applications. Whether you are involved in manufacturing, quality control, or product design, this standard is an essential tool for achieving excellence in your work.

With its focus on the resonance-curve method, the standard offers a precise and reliable way to assess the mechanical properties of plastics, enabling better material selection, performance prediction, and quality assurance. Embrace the insights provided by this standard to enhance your understanding and application of plastic materials in your industry.

BS EN ISO 6721-3:2021

This standard BS EN ISO 6721-3:2021 Plastics. Determination of dynamic mechanical properties is classified in these ICS categories:

• 83.080.01 Plastics in general

This document specifies a bending-vibration method based upon resonance curves for determining the flexural complex modulus of homogeneous plastics and the damping properties of laminated plastics intended for acoustic insulation, for example systems consisting of a metal sheet coated with a damping plastic layer, or sandwich systems consisting of two sheet-metal layers with an intermediate plastic layer. For many purposes, it is useful to determine these properties as a function of temperature and frequency.