1、BRITISH STANDARD BS EN ISO 2897-2:2003 Incorporating Corrigendum No. 1 Plastics Impact-resistant polystyrene (PS-I) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties The European Standard EN ISO 2897-2:2003 has the status of a British Standard ICS
2、 83.080.20 BS EN ISO 2897-2:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 24 January 2004 BSI 24 March 2004 ISBN 0 580 433102 National foreword This British Standard is the official English language version of EN ISO 2897-2:2003. It is
3、 identical with ISO 2897-2:2003. It supersedes BS EN ISO 2897-2:1999 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic Materials, which has the responsibility to: A list of organizations represented on this committee can be obtaine
4、d on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of
5、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 from legal obligations. aid e
6、nquirers 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 the UK. Summary of pages This
7、document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 5, the Annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was la
8、st issued. Amendments issued since publication Amd. No. Date Comments 15075 Corrigendum No. 1 24 March 2004 Corrected EN ISO foreword page and incorporating the Annex ZAEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO28972 December2003 ICS83.080.20 SupersedesENISO28972:1999 Englishversion Plasti
9、csImpactresistantpolystyrene(PSI)mouldingand extrusionmaterialsPart2:Preparationoftestspecimensand determinationofproperties(ISO28972:2003) PlastiquesPolystyrnesrsistantsauchoc(PSI)pour moulageetextrusionPartie2:Prparationdes prouvettesetdterminationdesproprits(ISO2897 2:2003) KunststoffeSchlagzhePo
10、lystyrol(PSI)Formmassen Teil2:HerstellungvonProbekrpernundBestimmungvon Eigenschaften(ISO28972:2003) ThisEuropeanStandardwasapprovedbyCENon10November2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstan
11、dardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibi
12、lityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia
13、,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO28972:2003
14、ECORRECTED20040303 Foreword Thisdocument(ENISO28972:2003)hasbeenpreparedbyTechnicalCommitteeISO/TC61 “Plastics“incollaborationwithTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatof whichisheldbyIBN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltex
15、torbyendorsement,atthelatestbyJune2004,andconflictingnational standardsshallbewithdrawnatthelatestbyJune2004. ThisdocumentsupersedesENISO28972:1999. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,B
16、elgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO28972:2003hasbeenapprovedbyCENasENISO28972:2003withoutany modifications. NOTENo
17、rmativereferencestoInternationalStandardsarelistedinannexZA(normative). ENISO28972:2003 Reference number ISO 2897-2:2003(E)INTERNATIONAL STANDARD ISO 2897-2 Third edition 2003-12-01 Plastics Impact-resistant polystyrene (PS-I) moulding and extrusion materials Part 2: Preparation of test specimens an
18、d determination of properties Plastiques Polystyrnes rsistants au choc (PS-I) pour moulage et extrusion Partie 2: Prparation des prouvettes et dtermination des proprits ENISO28972:2003ii ENISO28972:2003 iiiContents Page Foreword iv 1 Scope 1 2 Conformance . 1 3 Normative references . 1 4 Preparation
19、 of test specimens. 3 5 Conditioning of test specimens 3 6 Determination of properties. 4 ENISO28972:2003iv 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 n
20、ormally 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 i
21、n 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 prep
22、are 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 s
23、ome 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 2897-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials. This third edition cancels and re
24、places the second edition (ISO 2897-2:1994), which has been technically revised. ISO 2897 consists of the following parts, under the general title Plastics Impact-resistant polystyrene (PS-I) moulding and extrusion materials: Part 1: Designation system and basis for specifications Part 2: Preparatio
25、n of test specimens and determination of properties ENISO28972:2003 1Plastics Impact-resistant polystyrene (PS-I) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties 1 Scope 1.1 This part of ISO 2897 specifies the methods of preparation of test spec
26、imens and the test methods to be used in determining the properties of PS-I moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given here. 1.2 Procedures and conditions for the pre
27、paration of test specimens and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize PS-I moulding and extrusion materials are listed. 1.3 The properties have been selected from
28、 the general test methods in ISO 10350. Other test methods in wide use for, or of particular significance to, these moulding and extrusion materials are also included in this part of ISO 2897, as are the designatory properties specified in Part 1. 1.4 In order to obtain reproducible and comparable t
29、est results, it is necessary to use the methods of specimen preparation and conditioning, the specimen dimensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different proced
30、ures. 2 Conformance In Clause 3, the year of publication of each normative reference has been specifically stated. In order to be able to claim conformity with this part of ISO 2897, it is essential that the user use only those editions given, and not earlier or more recent editions. 3 Normative ref
31、erences 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 62:1980, Plastics Determination of wa
32、ter absorption ISO 75-2:1993, Plastics Determination of temperature of deflection under load Part 2: Plastics and ebonite ISO 178:1993, Plastics Determination of flexural properties ISO 179:1993, Plastics Determination of Charpy impact strength ENISO28972:20032 ISO 293: 1986, Plastics Compression mo
33、ulding test specimens of thermoplastic materials ISO 294-1:1996, Plastics Injection moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimens ISO 306:1994, Plastics Thermoplastic materials Determination of Vicat softening te
34、mperature (VST) ISO 527-2:1993, Plastics Determination of tensile properties Part 2: Test conditions for moulding and extrusion plastics ISO 527-4:1997, Plastics Determination of tensile properties Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastic composites ISO 899-1:19
35、93, Plastics Determination of creep behaviour Part 1: Tensile creep ISO 1133:1997, Plastics Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of thermoplastics ISO 1183:1987, Plastics Methods for determining the density and relative density of non-cellular plastics I
36、SO 2561:1974, Plastics Determination of residual styrene monomer in polystyrene by gas chromatography ISO 2818:1980, Plastics Preparation of test specimens by machining ISO 2897-1:1997, Plastics Impact-resistant polystyrene (PS-I) moulding and extrusion materials Part 1: Designation system and basis
37、 for specifications ISO 3167:1993, Plastics Multipurpose test specimens ISO 4589:1984, Plastics Determination of flammability by oxygen index ISO 8256:1990, Plastics Determination of tensile-impact strength ISO 10350:1993, Plastics Acquisition and presentation of comparable single-point data ISO1135
38、7-2:1999, Plastics Differential scanning calorimetry (DSC) Part 2: Determination of glass transition temperature IEC 60093:1980, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials IEC 60112:1979, Method for determining the comparative and the proo
39、f tracking indices of solid insulating materials under moist conditions IEC 60243-1:1998, Electrical strength of insulating materials Test methods Part 1: Tests at power frequencies IEC 60250:1969, Recommended methods for the determination of the permittivity and dielectric dissipation factor of ele
40、ctrical insulating materials at power, audio and radio frequencies including metre wavelengths IEC 60296:1982, Specification for unused mineral insulating oils for transformers and switchgear IEC 60695-11-10:1999, Fire hazard testing Part 11-10: Test flames 50 W horizontal and vertical flame test me
41、thods IEC 60695-11-20:1999, Fire hazard testing Part 11-20: Test flames 500 W flame test methods ENISO28972:2003 34 Preparation of test specimens 4.1 General It is essential that specimens always be prepared by the same procedure (either injection moulding or compression moulding), using the same pr
42、ocessing conditions. The procedure to be used for each test method is indicated in Tables 3 and 4. The material shall be kept in moisture-proof containers until it is required for use. The moisture content of filled or reinforced materials shall be expressed as a percentage of the total mass of the
43、compound. 4.2 Treatment of the material before moulding No pretreatment of the material sample is normally necessary before processing. 4.3 Injection moulding Injection-moulded specimens shall be prepared in accordance with ISO 294-1, using the conditions specified in Table 1, in which the temperatu
44、re values given are target values (see ISO 294-1 for tolerances). Table 1 Conditions for injection moulding of test specimens Material Melt temperature C Mould temperature C Injection velocity mm/s All grades 220 45 200 100 NOTE Flame-retardant grades may show discoloration if moulded at a melt temp
45、erature of 220 C. In such cases, a melt temperature of 210 C may be used. 4.4 Compression moulding Compression-moulded sheets shall be prepared in accordance with ISO 293, using the conditions specified in Table 2, in which the moulding temperature given is a target value (see ISO 293 for tolerances
46、). The test specimens required for the determination of the properties shall be machined from the compression- moulded sheets in accordance with ISO 2818 or stamped. Table 2 Conditions for compression moulding of test specimens Material Moulding temperature C Average cooling rate C/min Demoulding te
47、mperature C Full pressure MPa Full pressure time min Preheating time min All grades 200 10 u 60 4 0,5 5 1 5 1 5 Conditioning of test specimens Test specimens shall be conditioned for at least 16 h at (23 2) C and (50 10) % relative humidity. ENISO28972:20034 6 Determination of properties In the determination of properties and the presentation of data, the standards, supplementary instructions and notes given in ISO 10350 shall be applied. All tests shall be carried out in the standard atmosphere of (23 2) C and (50 10) % relative humidity, unles
