EN ISO 1264:1997

Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract (ISO 1264:1980)

Treatment of a test portion of resin with a given volume of an aqueous solution of sodium chloride previous neutralized to pH 7,0. After stirring and decanting, measurement of the potential difference existing between a glass electrode and a reference calomel electrode immersed in the liquid maintained at 23 °C and reading of this difference, expressed in pH units directly on th pH meter scale.

Kunststoffe - Vinylchlorid-Homo- und Copolymerisate - Bestimmung des pH-Wertes des wäßrigen Extraktes (ISO 1264:1980)

Diese Internationale Norm legt ein Verfahren zur Bestimmung des pH-Wertes des wässrigen Extrakts von vinylchlorid-Homo- und Copolymerisaten mittels eines mit einer Gaselektrode ausgerüsteten pH-Messgerätes fest. Diese Bestimmung ist nicht für das Abschätzen der elektrischen Eigenschaften des Polymerisats geeignet, aber sie kann von Interesse sein bei der Wahl von Additiven, insbeson-dere von Stabilisatoren, die für Herstellung von Formmassen verwendet werden.

Plastiques - Résines d'homopolymères et de copolymères de chlorure de vinyle - Détermination du pH de l'extrait aqueux (ISO 1264:1980)

La présente Norme internationale spécifie une méthode de détermination du pH de l'extrait aqueux des résines d'homopolymères et de copolymères de chlorure de vinyle, au moyen d'un pH-mètre muni d'une électrode en verre. Cette détermination n'est pas utilisable pour juger des qualités électriques de la résine, mais peut être intéressante pour le choix des adjuvants et, en particulier, des stabilisants à utiliser pour la préparation des compositions1).

Polimerni materiali - Homo- in kopolimeri vinilklorida - Določevanje pH vodnega ekstrakta (ISO 1264:1980)

General Information

• Status: Published
• Publication Date: 22-Jul-1997
• Withdrawal Date: 30-Jan-1998
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249/SC 1/WG 8 - Polyvinyls
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 23-Jul-1997
• Completion Date: 23-Jul-1997
• Ref Project: SIST EN ISO 1264:2000 - Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract (ISO 1264:1980)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 1264:2000
01-maj-2000
3ROLPHUQLPDWHULDOL+RPRLQNRSROLPHULYLQLONORULGD'RORþHYDQMHS+YRGQHJD
HNVWUDNWD,62
Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of
aqueous extract (ISO 1264:1980)
Kunststoffe - Vinylchlorid-Homo- und Copolymerisate - Bestimmung des pH-Wertes des
wäßrigen Extraktes (ISO 1264:1980)
Plastiques - Résines d'homopolymeres et de copolymeres de chlorure de vinyle -
Détermination du pH de l'extrait aqueux (ISO 1264:1980)
Ta slovenski standard je istoveten z: EN ISO 1264:1997
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 1264:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 1264:2000

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SIST EN ISO 1264:2000

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SIST EN ISO 1264:2000

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SIST EN ISO 1264:2000
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDlZATION.MEXJJYHAPO,4.lHAR OPI-AHM3AUMR fl0 CTAH,QAPTbl3Al&lkl*ORGANISATION INTERNATIONALE DE NORMALISATION
Homopolymer and copolymer resins of Vinyl
Plastics -
chloride - Determination of pH of aqueous extract
Determination du pH de l ’extrait aqueux
Plas tiques - Rbsines d ’homopolymeres et de copolymkres de chlorure de vinyle -
Second edition - 1980-11-01
U DC 678.7432243 : 543.257.1 Ref. No. ISO 12644980 (E)
Descriptors : plastics, homopolymers, copolymers, Vinyl chloride, resins, tests, determination, pH.
Price based on 2 pages

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SIST EN ISO 1264:2000
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bodies). The work of developing Inter-
national Standards is Garried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 1264 was developed by Technical Committee ISO/TC 61,
Plas tics .
This second edition was submitted directly to the ISO Council, in accordance with
clause 5.10.1 of part 1 of the Directives for the technical work of ISO. lt cancels and
replaces the first edition (i.e. ISO 1264-19751, which had been approved by the
member bodies of the following countries :
Australia
Hungary Poland
Austria India Romania
Belgium Iran South Africa, Rep. of
Bulgaria Israel Spain
Canada I taly Sweden
Czechoslovakia Japan Switzerland
Korea, Dem. P. Rep. of Turkey
Egypt, Arab Rep. of
France Korea, Rep. of USA
Germany, F. R. Netherlands Y ugoslavia
Greece New Zealand
The member body of the following country had expressed disapproval of the docu-
ment on technical grounds :
United Kingdom *
Later on the member body of the United Kingdom expressed approval of the second edition.
International Organkation for Standardkation, 1980
Printed in Switzerland

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SIST EN ISO 1264:2000
INTERNATIONAL STANDARD ISO 1264-1980 (E)
Homopolymer and copolymer resins of Vinyl
Plastics -
chloride - Determination of pH of aqueous extract
4.2 Pipette.
1 Scope and field of application
This International Standard specifies a method for the deter-
Beaker, of capacity 100 ml.
4.3
mination of the pH of the aqueous extract from homopolymer
and copolymer resins of Vinyl chloride, by means of a pH meter
4.4 Flask, of capacity 100 ml, fitted with a ground glass
equipped with a glass electrode.
stopper.
This determination is not suitable for estimating the electrical
but may be of interest in selecting
qualities of the resin,
4.5 Mechanical shaker/stirrer.
additives and, especially, stabilizers which are to be used for
the preparation of compounds.
5 Procedure
2 Principle
Before all measurements of pH of the aqueous extract, carry
out a blank test on the sodium chloride Solution (clause 3). This
Treatment of a test Portion of resin with a given volume of an
solution tan be regarded as correct if the value of the pH, so
aqueous Solution of sodium chloride previously neutralized to
determined, is between 6,8 and 7,2.
pH 7,0 rfr 0,2. After stirring and decanting, measurement of
the potential differente existing between a glass electrode and
If such is not the case, neutralize the Solution again as des-
a reference calomel electrode immersed in the liquid Phase of
cribed in clause 3 and carry ou
...