ISO 24087:2023

Name: ISO 24087:2023 — Rubber, vulcanized — Determination of the glass transition temperature and enthalpy by differential scanning calorimetry
SKU: ISO 24087:2023
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Rubber, vulcanized — Determination of the glass transition temperature and enthalpy by differential scanning calorimetry

Название (английский):

ISO 24087:2023

Rubber, vulcanized — Determination of the glass transition temperature and enthalpy by differential scanning calorimetry

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 12 июня 2023 г.
Издание:: ISO IS 24087 edition 1 version 1
ICS:: 83.060

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Описание (английский):

This document specifies a method of thermal analysis of vulcanized rubber by differential scanning calorimetry (DSC). This method is intended for the observation and measurement of various properties and phenomena associated, such as physical transitions (glass transition, melting and crystallization, polymorphic transitions, etc.).

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview - ISO 24087:2023 (DSC for vulcanized rubber)

ISO 24087:2023 specifies a standardized method for thermal analysis of vulcanized rubber using differential scanning calorimetry (DSC). The method covers observation and measurement of physical transitions such as the glass transition temperature (Tg), melting and crystallization transitions, polymorphic transitions, and associated enthalpy changes. The standard complements general DSC principles and rubber conditioning procedures referenced in ISO 11357-1 and ISO 23529.

Key topics and technical requirements

Scope and principle: Measures the heat-flow difference between a specimen and reference as a function of temperature/time under a controlled atmosphere. Supports both heat-flux DSC and power-compensation DSC.

Definitions: Clear definitions for Tg, melting, crystallization, enthalpy of fusion/crystallization, and DSC baseline/temperature conventions.

Apparatus specifications:

Heating/cooling rates: 0.5 K/min to 50 K/min.
Temperature resolution: 0.1 °C; accuracy ±0.5 °C or better.
Minimum test portion mass: 1 mg (or smaller if required).
Purge gas flow control: capability specified (controllable within 10 ml/min and 100 ml/min).
Crucibles: same type/material, similar masses (±0.5 mg); inert under test conditions; lids or hermetic sealing as required.
Balance: resolution 0.01 mg, accuracy ±0.1 mg or better.

Calibration:

Energy and temperature calibration per manufacturer instructions.
Minimum temperature calibration using indium and another material spanning the test range; transition temperatures defined at extrapolated onset (Tei).
Factors affecting calibration (crucible type, purge gas, sample mass, heating rates) must be controlled.

Procedure elements:

Baseline determination, specimen preparation and conditioning, performing measurements, Tg determination (using point of inflection), and calculation/reporting of transition temperatures and enthalpies.

Documentation: Includes precision data, reporting requirements, and informative annexes (recommended calibration materials and precision).

Applications and users

Rubber R&D and formulation laboratories for material characterization.

Quality control in tire, automotive, seal, hose and conveyor-belt manufacturing.

Materials scientists assessing glass transition temperature, crystallinity, and thermal stability of vulcanized elastomers.

Accreditation and testing laboratories preparing DSC-based test reports for specifications and regulatory compliance.

Practical benefits include consistent Tg and enthalpy measurements, improved comparability between labs, and informed material selection and process control.

Related standards

ISO 11357-1 - Plastics - Differential scanning calorimetry (general principles)

ISO 23529 - Rubber - General procedures for preparing and conditioning test pieces

Keywords: ISO 24087, differential scanning calorimetry, DSC, glass transition temperature, Tg, vulcanized rubber, enthalpy, thermal analysis, calibration, crucibles, heat-flux DSC, power-compensation DSC.

ISO 24087:2023

Abstract

Похожие стандарты

Overview - ISO 24087:2023 (DSC for vulcanized rubber)

Key topics and technical requirements

Applications and users

Related standards

Технические детали

BS EN ISO 11357-1:2023

Plastics. Differential scanning calorimetry (DSC). General principles.

BS ISO 24087:2023

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