Plastics - Unplasticized cellulose acetate - Determination of free acidity (ISO 1061:1990)

The free acidity determined by this method includes acidity extractable by water and acidity due to acidic groups directly attached to the cellulose acetate, e.g. carboxyl groups. This method is not suitable for cellulose acetate containing any additives which may affect the test. The principle consists in treating a test portion of cellulose acetate with water and titrating the resultant solution with sodium hydroxide solution. The free acidity is calculated as the percentage, by mass, of free acetic acid in the cellulose acetate. This second edition cancels and replaces the first edition ISO 1061:1975, of which it constitutes a minor technical revision.

Kunststoffe - Weichmacherfreies Celluloseacetat - Bestimmung der freien Säure (ISO 1061:1990)

Diese Internationale Norm legt ein Verfahren zur Bestimmung des Gehaltes an freier Säure von weichmacherfreiem Celluloseacetat fest. Der durch dieses Verfahren bestimmte Gehalt an freier Säure erfaßt die durch Wasser extahierbare Säuren und die Säure durch Säuregruppen, die direkt mit dem Celluloseacetat verknüpft sind, z.B. Carboxylgruppen. Im allgemeinen stellt die durch Säuregruppen vorhandene Saüre einen sehr geringen Anteil der gesamten freien Säure dar. Dieses Verfahren ist nicht anwendbar auf Celluloseacetat mit Zusatzstoffen, die die Untersuchungen beeinträchtigen könnten.

Plastiques - Acétate de cellulose non plastifié - Détermination de l'acidité libre (ISO 1061:1990)

La présente Norme internationale prescrit une méthode pour la détermination de l'acidité libre présente dans l'acétate de cellulose non plastifié.  L'acidité déterminée par la présente méthode comprend l'acidité de l'extrait aqueux et l'acidité due à des groupes, tels les groupes carboxyles, fixés directement à l'acétate de cellulose. Cette dernière constitue habituellement une très faible partie du total.  La méthode est applicable aux acétates de cellulose non plastifiés, qui ne contiennent pas d'additifs pouvant effectuer les résultats d'essai.

Polimerni materiali - Nemehčani acetati celuloze - Določanje kislosti (ISO 1061:1990)

General Information

Status
Published
Publication Date
30-Apr-2000
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-May-2000
Due Date
01-May-2000
Completion Date
01-May-2000

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 1061:2000
01-maj-2000
3ROLPHUQLPDWHULDOL1HPHKþDQLDFHWDWLFHOXOR]H'RORþDQMHNLVORVWL ,62


Plastics - Unplasticized cellulose acetate - Determination of free acidity (ISO 1061:1990)

Kunststoffe - Weichmacherfreies Celluloseacetat - Bestimmung der freien Säure (ISO

1061:1990)

Plastiques - Acétate de cellulose non plastifié - Détermination de l'acidité libre (ISO

1061:1990)
Ta slovenski standard je istoveten z: EN ISO 1061:1999
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 1061:2000 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 1061:2000
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SIST EN ISO 1061:2000
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SIST EN ISO 1061:2000
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SIST EN ISO 1061:2000
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SIST EN ISO 1061:2000
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SIST EN ISO 1061:2000
INTERNATIONAL
STANDARD
Second edi tion
19904145
------ ~---.--_----~ --~
Plastics - Unplasticized cellulose acetate -
Determination of free acidity
Plastiques - Aceiafe de celhlose non pfaslifie - D6terminafion de
I’acidife libre
Reference number
ISO ?061:1990(E)
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SIST EN ISO 1061:2000
ISO 1061:199O(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, govern-
mental 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 Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 1061 was prepared by Technical Committee
ISO/TC 61, Plastics.
This second edition cancels and replaces the first edition
(ISO 1061:1975), of which it constitutes a minor technical revision.
0 ISO 1990

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

Permission in writing from the publisher.
International Organizati on for Standardiz ation
l Swi tz erland
Case Postale 56 + CH-l 21 1 Geneve 20
Printed in Switzerland
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SIST EN ISO 1061:2000
INTERNATIONAL STANDARD ISO 1061:199O(E)
- Unplasticized cellulose acetate - Determination of
Plastics
free acidity

WARNING - The use of this International Standard may involve hazardous materials, operations and

equipment. This Standard does not Purpott to address all of the safety Problems associated with its use.

lt is the responsibility of the user of this Standard to establish appropriate safety and health practices

and determine the applicability of regulatory limitations Prior to use.
3 Principle
1 Scope
A test Portion of cellulose acetate is tt-eated with
This International Standard specifies a rnethod for
water and the resultant Solution titrated with sodium
the determination of the amount of free acid in
unplasticized cellulose acetate. hydroxide Solution.
The free acidity is calculated as the percentage, by
The ft-ee acidity determined by this method includes

acidity extractable by water and acidity due to acidic mass, of free acetic acid in the cellulose acetate.

groups directly attached to the cellulose acetate,
e-g. carboxyl groups. The latter is usually a very
small proportion of the total.
4 Reagents
This method is not suitable for cellulose acetate
During the determination, use only reaqents of re-
containing any additives which may affect the test.
cognized analytical grade and dis
...

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