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IS0
I NT ERN AT 1 ON A L ORGAN 12 AT I ON FOR S TA N DARD 1 Z AT I O N
IS0 RECOMMENDATION
R 871
PLASTICS
DETERMINATION OF THE TEMPERATURE OF EVOLUTION
OF FLAMMABLE GASES FROM PLASTICS
1st EDITION
November 1968
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The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
member of 1SO.
a
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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BRIEF HISTORY
The IS0 Recommendation R 871, Plastics - Determination oj'the temperature oj'evolution ojjlammable
gases from plastics, was drawn up by Technical Committee ISO/TC 61, Plastics, the Secretariat of which is held
by the United States of America Standards Institute (USASI).
Work on this question led. in 1965, to the adoption of a Draft IS0 Recommendation.
In September 1966, this Draft IS0 Recommendation (No. YY 1 J wab circulated tu all the IS0 Meniber Bodieb
for enquiry. It was approved, subject to a few modifications of an editorial nature, by the fdluwing Member Bodies :
Australia Iran South Atrlca. Rep. of
Austria Ireland Spain
Belgium Israel Sweden
Brad Italy Switrerland
Bulgaria Japan Thailand
U.A.R.
Chile Korea, Rep. 01
CI n i te d K in g d o rn
Czechoslovakia Netherlands
U.S.A.
Finland New Zealand
France Poland U.S.S.K.
Hungary Portugal
India Romania
Two Member Bvdies opposed the approval of the Draft :
Canada
Turkey
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council. which decided,
in November 1968, to accept it as an IS0 RECOMMENDATION.
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ISO/R 871-1%8(E)
IS0 Recommendation R 871 November 1968
PLASTICS
DETERMINATION OF THE TEMPERATURE OF EVOLUTION
OF FLAMMABLE GASES FROM PLASTICS
1. SCOPE
This IS0 Recommendation describes a method for determining the temperature at which plastics begin to decompose
appreciably to flammable gaseous products. It is one of a number of methods of use in evaluating the resistance of
plastics to the effects of high temperatures.
2. DEFINITiON
For the purposes of this IS0 Recommendation, the decomposition temperature is defined as that temperature,
measured in degrees Celsius, at which flammable gases are evolved from a material under specified test conditions.
3. SIGNIFICANCE OF THE TEST
This test provides an assessment of the evolution of combustible gases from plastics when exposed to high temper-
atures for a considerable length of time. The test does not, however, give a direct measure of the flammability or
rate of burning of a material nor any definition of the safe upper limit of temperature for the plastics in use.
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lSO/R 87 I -1Y68( E)
4. APPARATUS
The apparatus (see Fig.) consists essentially of a cylindrical block of copper or aluminium, having a diameter of
approximately 100 mm and a height of approximately 100 mm, provided with a thermometer hole and with holes
for the insertion of the specimen co
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