ISO 248-2:2019

Published (Edition 2, 2019)

This publication was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 248-2:2019

CHF 63

Convert Swiss francs (CHF) to your currency

Abstract

1.1 This document specifies two thermogravimetric methods for the determination of moisture and other volatile-matter content in raw rubbers by using an automatic analyser with an infrared drying unit.

1.2 These methods are applicable to the determination of volatile-matter content in synthetic rubbers (SBR, NBR, BR, IR, CR, IIR, halogenated IIR and EPDM) listed in ISO 1629 and to various forms of raw rubber, such as bale, block, chip, pellet, crumb, powder and sheet. These methods might also be applicable to other raw rubbers only when the change in mass is proven to be due solely to loss of original volatile matter and not to rubber degradation.

1.3 The methods are not applicable to raw rubbers which need homogenizing as specified in ISO 1795.

1.4 The hot-mill method and the oven method specified in ISO 248‑1 and the methods specified in this document might not give identical results. In cases of dispute, therefore, the oven method, procedure A, specified in ISO 248‑1:2011, is the referee method.

NOTE These methods can be useful for routine determinations, e.g. quality control, when the measurement conditions for the automatic analyser are fixed for a particular raw rubber or grade of raw rubber.

General information

Status
: Published

Publication date
: 2019-03

Stage
: International Standard confirmed [90.93]
Edition
: 2

Number of pages
: 10
Technical Committee :
ISO/TC 45/SC 3

ICS :
83.040.10
RSS updates