ISO 4664-3:2021
Rubber, vulcanized or thermoplastic — Determination of dynamic properties — Part 3: Glass transition temperature (Tg)
This document specifies a method for determining the glass transition temperature, Tg, of vulcanized rubbers in the hardness range from 30 IRHD to 80 IRHD. The dynamic properties are measured via temperature sweep in sinusoidal deformation at a defined strain and frequency and Tg is determined from the peak in the tan δ versus temperature curve. Glass transition temperature, Tg, determined in this way serves the purpose of a guideline to the service temperature of the material.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
5.1 General
5.2 Force capability and measurement
5.3 Cycling capability
5.4 Damping measuring device
5.5 Test chamber
5.6 Grips
5.7 Measurement of test piece dimensions
6 Test piece
6.1 Preparation
6.2 Dimensions
7 Number of test pieces
8 Conditioning
9 Procedure
9.1 Measurement of the test piece dimensions
9.2 Measurement of properties
9.3 Test conditions
9.3.1 Strain
9.3.2 Frequency
9.3.3 Temperature
9.4 Clamping and testing
10 Expression of results
10.1 General
10.2 Calculation of tan δ
11 Determination of glass transition temperature, Tg
12 Precision
13 Test report
Annex A (informative) Temperature dependence of dynamic properties of vulcanized rubber
Annex B (informative) Precision results from an interlaboratory test programme
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
5.1 General
5.2 Force capability and measurement
5.3 Cycling capability
5.4 Damping measuring device
5.5 Test chamber
5.6 Grips
5.7 Measurement of test piece dimensions
6 Test piece
6.1 Preparation
6.2 Dimensions
7 Number of test pieces
8 Conditioning
9 Procedure
9.1 Measurement of the test piece dimensions
9.2 Measurement of properties
9.3 Test conditions
9.3.1 Strain
9.3.2 Frequency
9.3.3 Temperature
9.4 Clamping and testing
10 Expression of results
10.1 General
10.2 Calculation of tan δ
11 Determination of glass transition temperature, Tg
12 Precision
13 Test report
Annex A (informative) Temperature dependence of dynamic properties of vulcanized rubber
Annex B (informative) Precision results from an interlaboratory test programme
Bibliography