EN ISO 1264:1997
(Main)Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract (ISO 1264:1980)
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
- 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
Overview
EN ISO 1264:1997 – Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract – provides an internationally recognized method for measuring the pH of aqueous extracts from vinyl chloride-based plastics. It is developed by the European Committee for Standardization (CEN) and aligns with ISO 1264:1980. This standard is essential for manufacturers, laboratories, and quality control professionals working with homopolymer and copolymer resins of vinyl chloride. The method involves extracting the resin with a neutralized sodium chloride solution and measuring the pH with calibrated electrodes at a controlled temperature.
Key Topics
- Aqueous Extract pH Measurement: The primary focus is the standardized procedure for determining the pH of an aqueous extract from polyvinyl chloride (PVC) resins.
- Sample Preparation: Involves treating a specified amount of resin with a sodium chloride solution pre-adjusted to pH 7.0.
- pH Measurement Equipment: Specifies the use of a calibrated pH meter with a glass electrode and a reference calomel electrode, ensuring accuracy and repeatability of results.
- Temperature Control: Emphasizes conducting measurements at 23°C for consistency, recognizing the temperature sensitivity of pH readings.
- Quality Assurance: Includes steps for blank measurements and duplicate determination to ensure reliability and reproducibility, with clear guidelines on allowable variation.
Applications
- Quality Control in Polymer Manufacturing: Used in industrial laboratories to evaluate the pH characteristics of PVC homopolymers and copolymers, which can indicate the presence of residual chemicals or impurities.
- Material Development and Selection: Supports the selection of additives and stabilizers during product formulation by providing an understanding of how the resin interacts with aqueous media.
- Regulatory Compliance: Helps manufacturers meet product safety and performance requirements by ensuring materials conform to internationally recognized testing standards.
- Process Optimization: Laboratories can use results from this test to optimize production processes and improve the stability and lifespan of vinyl chloride-based products.
- Research and Development: Essential for academic and industrial research aiming to improve or innovate vinyl chloride resin formulations.
Related Standards
- ISO 15528 - Sampling Procedures for Plastics: Outlines best practices for collecting and preparing test samples of plastics for laboratory analysis.
- ISO 6196 - Vocabulary of Plastics Testing: Provides definitions of key terms used in plastic materials testing, including those related to pH measurements.
- ISO 182 - Plastics – Determination of the tendency of PVC compounds to exude plasticizers: Relevant for laboratories testing related properties in vinyl chloride materials.
- ISO 4597 - Plastics – PVC Resins – Determination of Residual Vinyl Chloride Monomer: Another complementary test for ensuring the safety and compliance of PVC resins.
- EN ISO 17855 (Plastics – Polyolefin Resins – Determination of Solvent Extractables): For comparable procedures in non-vinyl chloride polymers.
By adhering to EN ISO 1264:1997, organizations can ensure reliable, reproducible determination of pH in aqueous extracts of vinyl chloride resins, supporting quality assurance, regulatory compliance, and product development functions within the plastics industry. This standard fosters consistency and comparability of results across laboratories and countries, strengthening confidence in PVC material performance.
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Frequently Asked Questions
EN ISO 1264:1997 is a standard published by the European Committee for Standardization (CEN). Its full title is "Plastics - Homopolymer and copolymer resins of vinyl chloride - Determination of pH of aqueous extract (ISO 1264:1980)". This standard covers: 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.
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.
EN ISO 1264:1997 is classified under the following ICS (International Classification for Standards) categories: 83.080.20 - Thermoplastic materials. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 1264:1997 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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
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
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
equipp
...
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