1、BRITISH STANDARDBS EN ISO 15023-2:2006 Incorporating Amendment No. 1 (to renumber BS ISO15023-2:2003 as BS EN ISO 15023-2:2006)Plastics Poly(vinyl alcohol) (PVAL) materials ICS 83.080.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g5
2、5g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 2: Determination of properties The European Standard EN ISO 15023-2:2006 has the status of a British StandardBS EN ISO 15023-2:2006This British Standard was published under the authority of the Standards Polic
3、y and Strategy Committee on 7 May 2003 BSI June 2006ISBN 0 580 41698 4National forewordThis 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, The
4、rmoplastic materials, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international publications referred to in this document may be found in the BSI Catalogue und
5、er the section entitled “International Standards Correspondence Index”, or by using 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 appl
6、ication. Compliance with a British Standard does not of itself confer immunity 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; m
7、onitor related international and European developments and promulgate them in the UK.Summary of pagesThis 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 i
8、ndicates when the document was last issued.Amendments issued since publicationAmd. No.16031 DateJune 2006 CommentsRenumbers BS ISO 15023-2:2003 as BS EN ISO 15023-2:2006.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 15023-2April 2006ICS 83.080.20English VersionPlastics - Poly(vinyl alcohol)
9、(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 von Eigenschaften (ISO 15023-2:2003)This European
10、 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 EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concernin
11、g such nationalstandards 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 translationunder the responsibility of a CEN member into its own languag
12、e and notified to the Central Secretariat has the same status as the officialversions.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,
13、Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitatio
14、n in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 15023-2:2006: EEN ISO 15023-2:2006 (E) 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
15、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 conf
16、licting 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, F
17、inland, 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 I
18、SO 15023-2:2006 without any modifications. Reference numberISO 15023-2:2003(E)INTERNATIONAL STANDARD ISO15023-2First edition2003-04-15Plastics Poly(vinyl alcohol) (PVAL) materials Part 2: Determination of properties Plastiques Matriaux en poly(alcool de vinyle) (PVAL) Partie 2: Dtermination des prop
19、rits EN ISO 150232:2006EN ISO 150232:2006ivContents Page Foreword vi 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 o
20、f 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 EN ISO 150232:2006vForeword ISO (the International Organization for Standardization) is
21、 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 represen
22、ted 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 dr
23、afted 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 S
24、tandard 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 prepa
25、red 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 EN
26、 ISO 150232:2006viIPlastics 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 composi
27、tion 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
28、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 dat
29、ed 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
30、 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) m
31、aterials Part 1: Designation system and basis for specifications EN ISO 150232:200613 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 thos
32、e 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
33、 of hydrolysis Annex D mol % Titration method Viscosity of 4 % aqueous solution 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 150232:20062Annex A (normative) Determination
34、 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 Const
35、ant-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
36、 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.3.1.4). Spread about 5 g of res
37、in 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 in the desiccator and weigh to
38、 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: 12VM10100mmwmm=where m0is the mass, in g, of the dish; m1is the initial mass, in g, of the dish plus test portion; EN ISO 150232:20063m2is the mass, i
39、n 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 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 nece
40、ssary 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. EN ISO 150232:20064Annex B (normative) Determination of sodium acetate
41、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
42、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 so
43、lution 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 in
44、dicator, 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 grou
45、nd-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.
46、EN ISO 150232:20065A 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
47、 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 wNaAc, as a percentage
48、by mass, from the following equation: 10NaAc( ) 0,082 03100VV cwm= where V1is the volume, in ml, of hydrochloric acid required for the test solution; V0is the volume, in ml, of hydrochloric acid required for the blank; c is the actual concentration, in mol/l, of the hydrochloric acid; 0,082 03 is th
49、e 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
