EN ISO 3521:1999
(Main)Plastics - Unsaturated polyester and epoxy resins - Determination of overall volume shrinkage (ISO 3521:1997)
Plastics - Unsaturated polyester and epoxy resins - Determination of overall volume shrinkage (ISO 3521:1997)
Describes a method for the determination of the overall volume shrinkage of unsaturated polyester and epoxsy resins. Replaces the first edition.
Kunststoffe - Ungesättigte Polyester und Epoxidharze - Bestimmung der Gesamtvolumenschwindung (ISO 3521:1997)
Plastiques - Résines d'époxydes et de polyesters non saturés - Détermination du retrait global en volume (ISO 3521:1997)
La présente Norme internationale prescrit une méthode pour la détermination du retrait global en volume des résines d'époxydes et de polyesters non saturés.
Polimerni materiali - Nenasičeni poliestri in epoksidne smole - Določanje celotnega volumskega skrčka (ISO 3521:1997)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 3521:2000
01-maj-2000
3ROLPHUQLPDWHULDOL1HQDVLþHQLSROLHVWULLQHSRNVLGQHVPROH'RORþDQMH
FHORWQHJDYROXPVNHJDVNUþND ,62
Plastics - Unsaturated polyester and epoxy resins - Determination of overall volume
shrinkage (ISO 3521:1997)
Kunststoffe - Ungesättigte Polyester und Epoxidharze - Bestimmung der
Gesamtvolumenschwindung (ISO 3521:1997)
Plastiques - Résines d'époxydes et de polyesters non saturés - Détermination du retrait
global en volume (ISO 3521:1997)
Ta slovenski standard je istoveten z: EN ISO 3521:1999
ICS:
83.080.10 Duromeri Thermosetting materials
SIST EN ISO 3521:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 3521:2000
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SIST EN ISO 3521:2000
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SIST EN ISO 3521:2000
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SIST EN ISO 3521:2000
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SIST EN ISO 3521:2000
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SIST EN ISO 3521:2000
INTERNATIONAL
3521
STANDARD
Second edition
1997-03-O 1
- Unsaturated polyester and epoxy
Plastics
Determination of overall volume
resins -
shrinkage
Plastiques - /Sines d ’6poxydes et de polyesters non sat&s -
D&termination du retrait global en volume
Reference number
IS0 3521 :I 997(E)
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SIST EN ISO 3521:2000
IS0 3521:1997(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for which
a technical committee has been established has the right to be rep-
resented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. IS0
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 IS0 3521 was prepared by Technical Committee
ISODC 61, Plastics, Subcommittee SC 12, Thermosetting materials.
This second edition cancels and replaces the first edition (IS0 3521:1976),
of which it constitutes a technical revision.
0 IS0 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
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SIST EN ISO 3521:2000
IS0 3521:1997(E)
INTERNATIONAL STANDARD @ IS0
Plastics - Unsaturated polyester and epoxy resins -
Determination of overall volume shrinkage
1 Scope
This International Standard specifies a method for the determination of the overall volume shrinkage of unsaturated
polyester and epoxy resins.
2 Normative reference
The following standard contains provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the edition indicated was valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the standard indicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
IS0 1675:1985, Plastics - Liquid resins - Determination of density by the pyknometer method.
3 Definition
For the purposes of this International Standard, the following definition applies.
3.1 overall volume shrinkage: The sum of the shrinkage during curing and the shrinkage after curing of a
casting when cooled to ambient temperature.
4 Principle
The overall volume shrinkage is calculated from the specific gravity of a last specimen before and after curing.
First, the specific gravity of the resin composition is determined
a) at the initial temperature of mixing of the components, excluding the initiators normally added to unsaturated
polyesters (see 6.1.3, note 1);
b) at 23 “C after curing and conditioning of the last specimen.
The overall volume shrinkage is then calculated as a percentage of the change in the specific gravity before and
after curing, as follows:
Uncured specific gravity -
...
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