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1、BRITISH STANDARD BS EN ISO 15023-2:2006 Incorporating Amendment No. 1 (to renumber BS ISO 15023-2:2003 as BS EN ISO 15023-2:2006) Plastics Poly(vinyl alcohol) (PVAL) materials ICS 83.080.20 ? Part 2: Determination of properties The European Standard EN ISO 15023-2:2006 has the status of a British St
2、andard Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 15023-2:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 7 May 2003 BSI June 2006 ISBN 0 580 41698 4 National fore
3、word This British Standard is the official English language version of EN ISO 15023-2:2006. It is identical with ISO 15023-2:2003. The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic materials, which has the responsibility to: A list of organizations re
4、presented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by u
5、sing the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity
6、 from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in
7、the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, the ISO title page, pages iv to vi, pages 1 to 17 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publica
8、tion Amd. No. 16031 Date June 2006 Comments Renumbers BS ISO 15023-2:2003 as BS EN ISO 15023-2:2006. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 15023-2 April 2006 ICS 83.080.20 En
9、glish Version Plastics - Poly(vinyl alcohol) (PVAL) materials - Part 2: Determination of properties (ISO 15023-2:2003) Plastiques - Matriaux en poly(alcool de vinyle) (PVAL) - Partie 2: Dtermination des proprits (ISO 15023-2:2003) Kunststoffe - Polyvinylalkohol (PVAL)-Formmassen - Teil 2: Bestimmung
10、 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-t
11、o-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
12、 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, Icel
13、and, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de
14、 Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15023-2:2006: E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 15023-2:2006 (E
15、) ii 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. T
16、his 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,
17、 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, P
18、oland, 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. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Unco
19、ntrolled Copy, (c) BSI Reference number ISO 15023-2:2003(E) INTERNATIONAL STANDARD ISO 15023-2 First edition 2003-04-15 Plastics Poly(vinyl alcohol) (PVAL) materials Part 2: Determination of properties Plastiques Matriaux en poly(alcool de vinyle) (PVAL) Partie 2: Dtermination des proprits EN ISO 15
20、0232:2006 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 150232:2006 iv Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Contents Page Foreword vi 1 Scope1 2 Normative referen
21、ces .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 o
22、f viscosity of 4 % aqueous solution by the Brookfield Test method or the inclined-tube falling-ball method12 EN ISO 150232:2006 v Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword ISO (the International Organization for Standardizatio
23、n) 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 rep
24、resented 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 a
25、re 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 Internatio
26、nal 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
27、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 properti
28、es EN ISO 150232:2006 vi Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 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 pro
29、perties 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 hy
30、drolysis) 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 Normat
31、ive 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
32、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 usi
33、ng 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 EN ISO 150232:2006 1 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c
34、) BSI 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 P
35、roperty 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 solutio
36、n Annex E mPas 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) % EN ISO 150232:2006 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI An
37、nex 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 Metho
38、d 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 Desic
39、cator, 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 (m0), after heating it in the oven (A.3.1.1) maintained at (105 2) C for 1 h and cooling it to room temperature in the desiccator (A.
40、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 (m1). Place the 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
41、 in the desiccator and weigh to the nearest 0,001 g (m2). A.4 Expression of results Calculate the volatile-matter content wVM, as a percentage by mass, from the following equation: 12 VM 10 100 mm w mm = where m0 is the mass, in g, of the dish; m1 is the initial mass, in g, of the dish plus test por
42、tion; EN ISO 150232:2006 3 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI m2 is the mass, in g, of the dish plus test portion after heating. Calculate the mean of the results of the two determinations and express the final result to two pla
43、ces 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
44、; d) the individual results of the two determinations; e) the date of the test. EN ISO 150232:2006 4 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Annex B (normative) Determination of sodium acetate content B.1 Scope This annex specifies t
45、he 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.
46、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 co
47、nductometer. 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 m
48、ixed 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
49、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. EN ISO 150232:2006 5 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:48:25 GMT+00:00 2006, Uncontrolled Copy, (c) BSI A sample with a low degree of hydrolysis may