ISO 9782:2026

International
Standard
ISO 9782
Second edition
Plastics — Reinforced moulding
2026-07
compounds and prepregs —
Determination of apparent volatile-
matter content
Plastiques renforcés — Compositions pour moulage et
préimprégnés — Détermination de la teneur apparente en
matières volatiles
Reference number
© ISO 2026
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Published in Switzerland
ii
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Sampling and test specimens . 2
6.1 Sampling .2
6.2 Shape and dimensions .2
6.3 Preparation and number of test specimens.2
7 Sample conditioning and test atmosphere. 2
7.1 Sample conditioning .2
7.2 Test atmosphere .2
8 Procedure . 2
9 Calculation and expression of results . 3
10 Precision . 3
11 Test report . 3
Annex A (informative) Precision data obtained from an interlaboratory test . 4

iii
Foreword
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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites
and reinforcement fibres.
This second edition cancels and replaces the first edition (ISO 9782:1993), which has been technically
revised.
The main changes are as follows:
— the requirement for the weighing accuracy of balances has been raised from ±1 mg to ±0,1 mg;
— a timer has been added in the apparatus clause;
— the symbol V for volatile-matter content in the calculation formula has been supplemented;
c
— the number of test specimens has been changed from "three" to "at least three";
— the following instruction has been added to 8.4 “The specimens should be placed so that the maximum
surface area is exposed to the circulating heat.”;
— a precision statement has been added in Annex A.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.

iv
International Standard ISO 9782:2026(en)
Plastics — Reinforced moulding compounds and prepregs —
Determination of apparent volatile-matter content
1 Scope
This document specifies a method for the determination of the apparent volatile-matter content in pre-
impregnated yarns, tapes, mats (SMC) and fabrics.
The method is applicable to all unidirectional and multidirectional fibre-reinforced prepregs and all
thermosetting-resin matrices, unless otherwise specified in product specifications.
The method does not apply to unimpregnated reinforceme
...