EN ISO 2578:1998
(Main)Plastics - Determination of time-temperature limits after prolonged exposure to heat (ISO 2578:1993)
Plastics - Determination of time-temperature limits after prolonged exposure to heat (ISO 2578:1993)
Specifies the principles and procedures for evaluating the thermal endurance properties of plastics exposed to elevated temperature for long periods. The study of the thermal ageing is based solely on the change in certain properties resulting from a period of exposure to elevated temperature. The properties studied are always measured after the temperature has returned to ambient.
Kunststoffe - Bestimmung der Temperatur-Zeit-Grenzen bei langanhaltender Wärmeeinwirkung (ISO 2578:1993)
Diese Internationale Norm legt Grundsätze und Versuchdurchführung zur Bewertung des thermischen Langzeitverhaltens von Kunststoffen bei andauernder Einwirkung von Wärme fest. Der Begriff thermisches Langzeitverhalten bezieht sich auf Versuche, die in Luft gemacht wurden, ohne daß irgendwelche andere Einflüsse oder Beanspruchungen auf die Probekörper einwirkten. Wenn das thermische Langzeitverhalten in anderer Umgebung und/oder mit anderen auf die Probekörper einwirkenden Beanspruchungen beurteilt werden soll, so erfordert dies gesonderte Versuche.
Plastiques - Détermination des limites temps-températures après exposition à l'action prolongée de la chaleur (ISO 2578:1993)
Polimerni materiali - Ugotavljanje mejnih vrednosti čas-temperatura po daljši izpostavljenosti toploti (ISO 2578:1993)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 2578:2000
01-maj-2000
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L]SRVWDYOMHQRVWLWRSORWL ,62
Plastics - Determination of time-temperature limits after prolonged exposure to heat (ISO
2578:1993)
Kunststoffe - Bestimmung der Temperatur-Zeit-Grenzen bei langanhaltender
Wärmeeinwirkung (ISO 2578:1993)
Plastiques - Détermination des limites temps-températures apres exposition a l'action
prolongée de la chaleur (ISO 2578:1993)
Ta slovenski standard je istoveten z: EN ISO 2578:1998
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 2578:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 2578:2000
INTERNATIONAL
ISO
STANDARD
2578
Second edition
1993-08-01
Plastics
- Determination of
time-temperature limits after prolonged
exposure to heat
Plas tiques - Determination des limites temps-tempka tures apr&
exposition 2 I’action prolong6e de Ia chaleur
Reference number
ISO 2578: 1993(E)
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SIST EN ISO 2578:2000
ISO 2578:1993(E)
Contents
Page
1
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .~.
1
2 Normative references . . . . . . . . .*.
2
3 Def initions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
4 Principle ’ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
5 Choice of test .,.,.,,.
Choice of end-point . . . . . . . . .*. 3
6
,.,.,. 3
7 Test specimens
.,.,.,,,.,.~.,.,,,., 3
8 Exposure temperatures
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*. 3
9 Ageing ovens
3
10 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.,. . . . . . 4
11 Evaluation of results
................... 7
12 Determination of the relative temperature index
................... 8
13 Test report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Annexes
9
Calculation of the regression line .
A
............................................................ 13
B Correlation coefficient
............ 14
C Recommended test schedule for primaty properties
0 ISO 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
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SIST EN ISO 2578:2000
ISO 2578:1993(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been established has the right to be
represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work. ISO
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard ISO 2578 was
...
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