SIST EN ISO 15023-2:2006
(Main)Plastics - Poly(vinyl alcohol) (PVAL) materials - Part 2: Determination of properties (ISO 15023-2:2003)
Plastics - Poly(vinyl alcohol) (PVAL) materials - Part 2: Determination of properties (ISO 15023-2:2003)
This part of ISO 15023 specifies the methods to be used in det ermining the properties of poly(vinyl alcohol), which is norma lly prepared by hydrolysis of poly(vinyl acetate) and whose co mposition comprises vinyl alcohol monomeric units and vinyl ac etate monomeric units. This part of ISO 15023 is applicable to poly(vinyl alcohol) with a vinyl alcohol unit content (degree of hydrolysis) from 70 mol % to 100 mol %.
Kunststoffe - Polyvinylalkohol (PVAL)-Formmassen - Teil 2: Bestimmung von Eigenschaften (ISO 15023-2:2003)
Der vorliegende Teil von ISO 15023 legt die Verfahren fest, die bei der Bestimmung der Eigenschaften von Polyvinylalkohol anzuwenden sind, der gewöhnlich durch Hydrolyse von Poly(vinylacetat) hergestellt wird und dessen Zusammensetzung monomere Einheiten von Vinylalkohol und Vinylacetat einschließt. Dieser Teil von ISO 15023 gilt für Polyvinylalkohol mit einem Gehalt an Vinylalkoholeinheiten (Hydrolysegrad) von 70 Mol-% bis 100 Mol-%.
Zusätzlich zu den in ISO 15023 1 festgelegten kennzeichnenden Eigenschaften (Hydrolysegrad und Viskosität einer wässrigen Lösung) enthält der vorliegende Teil von ISO 15023 eine Reihe von weiteren Eigenschaften, die gewöhnlich für die Spezifikation von PVAL Formmassen verwendet werden (siehe Tabelle 1).
Plastiques - Matériaux en poly(alcool de vinyle) (PVAL) - Partie 2: Détermination des propriétés (ISO 15023-2:2003)
L'ISO 15023-2:2003 spécifie les méthodes à utiliser pour déterminer les propriétés du poly(alcool de vinyle), normalement préparé par hydrolyse du poly(acétate de vinyle) et qui comprend, dans sa composition, des monomères d'alcool de vinyle et des monomères d'acétate de vinyle. La présente partie de l'ISO 15023 s'applique aux poly(alcool de vinyle) ayant une teneur en monomères d'alcool de vinyle (degré d'hydrolyse) allant de 70 mol % à 100 mol %.
Outre les propriétés de désignation spécifiées dans l'ISO 15023-1 (degré d'hydrolyse et viscosité d'une solution aqueuse), l'ISO 15023-2:2003 inclut un certain nombre d'autres propriétés communément utilisées pour spécifier les matériaux en PVAL.
Polimerni materiali - Materiali na osnovi polivinilalkohola (PVAL) – 2. del: Ugotavljanje lastnosti (ISO 15023-2:2001)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 15023-2:2006
01-julij-2006
Polimerni materiali - Materiali na osnovi polivinilalkohola (PVAL) – 2. del:
Ugotavljanje lastnosti (ISO 15023-2:2001)
Plastics - Poly(vinyl alcohol) (PVAL) materials - Part 2: Determination of properties (ISO
15023-2:2003)
Kunststoffe - Polyvinylalkohol (PVAL)-Formmassen - Teil 2: Bestimmung von
Eigenschaften (ISO 15023-2:2003)
Plastiques - Matériaux en poly(alcool de vinyle) (PVAL) - Partie 2: Détermination des
propriétés (ISO 15023-2:2003)
Ta slovenski standard je istoveten z: EN ISO 15023-2:2006
ICS:
83.080.20
SIST EN ISO 15023-2:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 15023-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2006
ICS 83.080.20
English Version
Plastics - Poly(vinyl alcohol) (PVAL) materials - Part 2:
Determination of properties (ISO 15023-2:2003)
Plastiques - Matériaux en poly(alcool de vinyle) (PVAL) - Kunststoffe - Polyvinylalkohol (PVAL)-Formmassen - Teil 2:
Partie 2: Détermination des propriétés (ISO 15023-2:2003) Bestimmung von Eigenschaften (ISO 15023-2:2003)
This European Standard was approved by CEN on 16 March 2006.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15023-2:2006: E
worldwide for CEN national Members.
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EN ISO 15023-2:2006 (E)
Foreword
The text of ISO 15023-2:2003 has been prepared by Technical Committee ISO/TC 61 "Plastics”
of the International Organization for Standardization (ISO) and has been taken over as EN ISO
15023-2:2006 by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held
by IBN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by October 2006, and conflicting national
standards shall be withdrawn at the latest by October 2006.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 15023-2:2003 has been approved by CEN as EN ISO 15023-2:2006 without any
modifications.
2
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INTERNATIONAL ISO
STANDARD 15023-2
First edition
2003-04-15
Plastics — Poly(vinyl alcohol) (PVAL)
materials —
Part 2:
Determination of properties
Plastiques — Matériaux en poly(alcool de vinyle) (PVAL) —
Partie 2: Détermination des propriétés
Reference number
ISO 15023-2:2003(E)
©
ISO 2003
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ISO 15023-2:2003(E)
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ii © ISO 2003 — All rights reserved
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ISO 15023-2:2003(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references. 1
3 Determination of properties. 2
Annex A (normative) Determination of volatile-matter content. 3
Annex B (normative) Determination of sodium acetate content . 5
Annex C (normative) Calculation of ash . 8
Annex D (normative) Determination of degree of hydrolysis . 9
Annex E (normative) Determination of viscosity of 4 % aqueous solution by the Brookfield Test
method or the inclined-tube falling-ball method. 12
© ISO 2003 — All rights reserved iii
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ISO 15023-2:2003(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. Each 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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15023-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic
materials.
ISO 15023 consists of the following parts, under the general title Plastics — Poly(vinyl alcohol) (PVAL)
materials:
Part 1: Designation system and basis for specifications
Part 2: Determination of properties
iv © ISO 2003 — All rights reserved
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INTERNATIONAL STANDARD ISO 15023-2:2003(E)
Plastics — Poly(vinyl alcohol) (PVAL) materials —
Part 2:
Determination of properties
1 Scope
This part of ISO 15023 specifies the methods to be used in determining the properties of poly(vinyl alcohol),
which is normally prepared by hydrolysis of poly(vinyl acetate) and whose composition comprises vinyl alcohol
monomeric units and vinyl acetate monomeric units. This part of ISO 15023 is applicable to poly(vinyl alcohol)
with a vinyl alcohol unit content (degree of hydrolysis) from 70 mol % to 100 mol %.
In addition to the designatory properties specified in ISO 15023-1 (degree of hydrolysis and viscosity of an
aqueous solution), this part of ISO 15023 includes a number of other properties which are commonly used to
specify PVAL materials (see Table 1).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 976:1996, Rubber and plastics — Polymer dispersions and rubber latices — Determination of pH
ISO 6587:1992, Paper, board and pulps — Determination of conductivity of aqueous extracts
ISO 8130-1:1992, Coating powders — Part 1: Determination of particle size distribution by sieving
ISO 12058-1:1997, Plastics — Determination of viscosity using a falling-ball viscometer — Part 1:
Inclined-tube method
ISO 15023-1:2001, Plastics — Poly(vinyl alcohol) (PVAL) materials — Part 1: Designation system and basis
for specifications
© ISO 2003 — All rights reserved 1
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ISO 15023-2:2003(E)
3 Determination of properties
In the determination of properties and the presentation of results, the standards, methods and special
conditions listed in Table 1 shall apply. The properties listed in Table 1 are those appropriate to poly(vinyl
alcohol).
Table 1 — Properties and test conditions
Property Method Unit Test conditions and supplementary
instructions
Volatile-matter content Annex A % by mass 105 °C, 3 h
Sodium acetate content Annex B % by mass Titration or conductivity method
Ash Annex C % by mass
Degree of hydrolysis Annex D mol % Titration method
Viscosity of 4 % aqueous solution Annex E mPa◊s Rotational or inclined-tube falling-ball
viscometer, 20 °C
Particle size distribution ISO 8130-1 %
pH of aqueous solution ISO 976 — Concentration (4,0 ± 0,2) %
2 © ISO 2003 — All rights reserved
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ISO 15023-2:2003(E)
Annex A
(normative)
Determination of volatile-matter content
A.1 Scope
This annex specifies the method to be used for the determination of the volatile-matter content of PVAL.
A.2 Principle
The volatile-matter content is calculated from the loss in mass of a specimen heated at 105 °C for 3 h.
A.3 Method
A.3.1 Apparatus
A.3.1.1 Constant-temperature oven, able to maintain a temperature of (105 ± 2) °C.
A.3.1.2 Weighing dish, shallow, about 60 mm in diameter and 30 mm in height, of glass, aluminium or
preferably stainless steel, with a lid.
A.3.1.3 Balance, capable of weighing to 0,001 g.
A.3.1.4 Desiccator, containing silica gel as a drying agent.
A.3.2 Procedure
Carry out the determination in duplicate.
Weigh the dish (A.3.1.2) with its lid to the nearest 0,001 g (m ), after heating it in the oven (A.3.1.1)
0
maintained at (105 ± 2) °C for 1 h and cooling it to room temperature in the desiccator (A.3.1.4). Spread about
5 g of resin evenly over the bottom of the dish, replace the lid and weigh to the nearest 0,001 g (m ). Place the
1
assembly in the oven at (105 ± 2) °C, remove the lid (leaving it in the oven) and close the oven door. After
3 h ± 5 min, remove the assembly from the oven, allow to cool in the desiccator and weigh to the nearest
0,001 g (m ).
2
A.4 Expression of results
Calculate the volatile-matter content w , as a percentage by mass, from the following equation:
VM
mm−
12
w=×100
VM
mm−
10
where
m is the mass, in g, of the dish;
0
m is the initial mass, in g, of the dish plus test portion;
1
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ISO 15023-2:2003(E)
m is the mass, in g, of the dish plus test portion after heating.
2
Calculate the mean of the results of the two determinations and express the final result to two places of
decimals.
A.5 Test report
The test report shall include the following particulars:
a) a reference to this part of ISO 15023;
b) all details necessary for complete identification of the material tested;
c) the volatile-matter content, calculated as the arithmetic mean of the two determinations;
d) the individual results of the two determinations;
e) the date of the test.
4 © ISO 2003 — All rights reserved
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ISO 15023-2:2003(E)
Annex B
(normative)
Determination of sodium acetate content
B.1 Scope
This annex specifies the method to be used for the determination of the sodium acetate content of PVAL. The
content can be determined either by a titration method or by a conductivity method. Additives can interfere
with the determination, and these methods may not be suitable for PVAL containing them.
B.2 Principle
B.2.1 Titration method
The sample is dissolved in water and the solution titrated with hydrochloric acid using methyl orange as
indicator. The sodium acetate content is calculated as a percentage by mass.
B.2.2 Conductivity method
The conductivity of an aqueous solution of the sample is measured in a conductometer. The sodium acetate
content of the solution is determined by calibrating the conductometer with solutions containing known
amounts of sodium acetate.
B.3 Titration method
B.3.1 Reagents
B.3.1.1 Hydrochloric acid, 0,1 mol/l.
B.3.1.2 Methyl orange indicator, 1 g/l solution in ethanol, or mixed methylene blue/methyl yellow
indicator, prepared by mixing equal parts of a 0,1 % solution of methylene blue in reagent-grade ethanol with
a 0,1 % solution of methyl yellow in reagent-grade ethanol.
B.3.2 Apparatus
B.3.2.1 Conical flask, 300 ml, with ground-glass stopper.
B.3.2.2 Cylinder, 200 ml, graduated in 2 ml.
B.3.2.3 Burette, 50 ml, graduated in 0,1 ml.
B.3.3 Procedure
Carry out the determination in duplicate.
Weigh about 5 g of sample to the nearest 0,001 g into the conical flask (B.3.2.1), add about 150 ml of water
and dissolve by heating.
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ISO 15023-2:2003(E)
A sample with a low degree of hydrolysis may sometimes cause the solution to become turbid. If this occurs,
cool the solution slowly while stirring gently. Alternatively, a 3:1 water/methanol mixture may be used.
After dissolution, cool and titrate with 0,1 mol/l hydrochloric acid to an end point where the solution turns from
orange-yellow to red if methyl orange is used as indicator or from green to light purple if methylene
blue/methyl yellow is used.
Carry out a blank test separately.
B.3.4 Expression of results
Calculate the sodium acetate content w , as a percentage by mass, from the following equation:
NaAc
(VV−×) c× 0,082 03
10
w=×100
NaAc
m
where
V is the volume, in ml, of hydrochloric acid required for the test solution;
1
V is the volume, in ml, of hydrochloric acid required for the blank;
0
c is the actual concentration, in mol/l, of the hydrochloric acid;
0,082 03 is the molecular mass of sodium acetate divided by 1 000;
m is the mass, in g, of the test portion.
Calculate the mean of the results of the two determinations and express the final result to two places of
decimals.
B.4 Conductivity method
B.4.1 Reagent
B.4.1.1 Sodium acetate, reagent grade.
B.4.2 Apparatus
B.4.2.1 Conical flask, 100 ml, with ground-glass stopper.
B.4.2.2 Cylinder, 100 ml, graduated in 1 ml.
B.4.2.3 Conductivity meter, as specified in ISO 6587.
B.4.2.4 Thermometer, graduated in 0,1 °C.
B.4.2.5 Volumetric flask, 100 ml, with ground-glass stopper.
B.4.3 Procedure
Carry out the determination in duplicate.
Weigh 0,5 g of sample to the nearest 0,001 g into a conical flask, add about 50 ml of water and dissolve by
heating.
A sample with a low degree of hydrolysis may sometimes cause the solution to become turbid. If this occurs,
cool the solution slowly while stirring gently.
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ISO 15023-2:2003(E)
Transfer the solution to a 100 ml volumetric flask and make up to the mark with water.
Transfer about 50 ml of the aqueous solution in the volumetric flask to the measuring cell of the conductivity
meter. Measure the conductivity at 30 °C ± 0,1 °C.
B.4.4 Calibration curve
Prepare the calibration curve as follows:
Prepare four or five aqueous sodium acetate solutions covering a suitable range of concentrations and
measure their conductivities.
Prepare the calibration curve by plotting the conductivity values against the corresponding sodium
...
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