1、BRITISH STANDARD BS EN ISO 11542-2:1998 Incorporating corrigendum June 2007 Plastics Ultra-high-molecular- weight polyethylene (PE-UHMW) moulding and extrusion materials Part 2: Preparation of test specimens and determination of properties ICS 83.080.20 BS EN ISO 11542-2:1998 This British Standard w
2、as published under the authority of the Standards Committee and comes into effect on 15 February 1999 BSI 2008 ISBN 978 0 580 59298 0 National foreword This British Standard is the UK implementation of EN ISO 11542-2:1998. It is identical with ISO 11542-2:1998, incorporating corrigendum June 2007. T
3、he UK participation in its preparation was entrusted to Technical Committee PRI/35, Speciality thermoplastics moulding materials. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisio
4、ns of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication Date Comments 30 June 2008 Implementation of ISO corrigendum June 2007 (replacement of paragraph in A.
5、6) and alignment of BSI and CEN publication datesEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11542-2 November 1998 ICS 83.080.20 Descriptors: See ISO document English version Plastics Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials Part2:Preparation o
6、f test specimens and determination ofproperties (ISO11542-2:1998) Plastiques Matriaux base de polythylne trs haute masse molculaire (PE-UHMW) pour moulage et extrusion Partie 2: Prparation des prouvettes et dtermination des proprits (ISO11542-2:1998) Kunststoffe Ultrahochmolekulares Polyethylen (PE-
7、UHMW)-Formmassen Teil 2: Herstellung von Probekrpem und Bestimmung von Eigenschaften (ISO11542-2:1998) This European Standard was approved by CEN on8November1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standar
8、d 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, Ge
9、rman). 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, CzechRepublic, Denmark, F
10、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050
11、 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11542-2:1998 Eii Foreword The text of the International Standard ISO11542-2:1998 has been prepared by Technical Committee ISO/TC61 “Plastics” in collaboration with
12、Technical Committee CEN/TC249 “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 May1999, and conflicting national standards shall be withdrawn at
13、 the latest by May1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, N
14、etherlands, Norway, Portugal, Spain, Sweden, Switzerland and theUnitedKingdom. Endorsement notice The text of the International Standard ISO11542-2:1998 was approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (no
15、rmative). Contents Page 1 Scope 1 2 Normative references 1 3 Preparation of test specimens 2 4 Conditioning of test specimens 2 5 Determination of properties 2 Annex A (normative) Method for determining the elongational stress of PE-UHMW moulding material 5 Annex B (normative) Method for determining
16、 the “double notch” Charpy impact strength of PE-UHMW moulding material 9 Annex ZA (normative) Normative references to international publications with their relevant European publications 12 Figure A.1 Schematic diagram of apparatus for determining elongational stress 6 Figure A.2 Specimen holder 7
17、Figure A.3 Test specimen 8 Figure A.4 Typical curve for determining the elongational stress 9 Figure B.1 Notching device and notched test specimen 11 Table 1 Compression-moulding conditions 2 Table 2 General properties and test conditions 3 Table 3 Additional properties and test conditions of partic
18、ular utility to PE-UHMW moulding and extrusion materials 4 Table A.1 Masses, in grams, of weights used to load specimen 6 BSI 2008 BS EN ISO 11542-2:19981 1 Scope This part of ISO11542 specifies the methods of preparation of test specimens and the test methods to be used in determining the propertie
19、s of PE-UHMW 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. Procedures and conditions for the preparation of test specimens and procedures for measuring properties
20、of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize PE-UHMW moulding and extrusion materials are listed. The properties have been selected from the general test methods in ISO10350-1. Other test methods in wide
21、use for or of particular significance to these moulding and extrusion materials are also included in this part of ISO11542, as are the designatory properties specified in part1. In order to obtain reproducible and comparable test results, it is necessary to use the methods of preparation and conditi
22、oning, 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 procedures. 2 Normative references The following standards contain provisions which, thro
23、ugh reference in this text, constitute provisions of this part of ISO11542. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO11542 are encouraged to investigate the possibility of applying the mos
24、t recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 62:, Plastics Determination of water absorption 1) . ISO 75-1:1993, Plastics Determination of temperature of deflection under load Part1:General test method.
25、ISO 75-2:1993, Plastics Determination of temperature of deflection under load Part2:Plastics and ebonite. ISO 178:1993, Plastics Determination of flexural properties. ISO 179-1:, Plastics Determination of Charpy impact properties Part1: Non-instrumented impact test 2) . ISO 291:1997, Plastics Standa
26、rd atmospheres for conditioning and testing. ISO 293:1986, Plastics Compression moulding test specimens of thermoplastic materials. ISO 527-1:1993, Plastics Determination of tensile properties Part1: General principles. ISO 527-2:1993, Plastics Determination of tensile properties Part2: Test conditi
27、ons for moulding and extrusion plastics. ISO 527-4:1997, Plastics Determination of tensile properties Part 4: Test conditions for isotropic and orthotropic fibre-reinforced plastics composites. ISO 899-1:1993, Plastics Determination of creep behaviour Part 1: Tensile creep. ISO 1183:1987, Plastics M
28、ethods for determining the density and relative density of non-cellular plastics. ISO 1210/IEC60695-11-10:, Determination of the burning behaviour of horizontal and vertical specimens in contact with a small-flame(50W) ignition source 3) . ISO 1628-3:1991, Plastics Determination of viscosity number
29、and limiting viscosity number Part3: Polyethylenes and polypropylenes. ISO 2818:1994, Plastics Preparation of test specimens by machining. ISO 3146:, Plastics Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-micro
30、scope methods 4) . ISO 3167:1993, Plastics Multipurpose test specimens. ISO 4589-1:1996, Plastics Determination of burning behaviour by oxygen index Part1:Guidance. ISO 4589-2:1996, Plastics Determination of burning behaviour by oxygen index Part2:Ambient-temperature test. ISO 8256:1990, Plastics De
31、termination of tensile-impact strength. ISO 10350:1993, Plastics Acquisition and presentation of comparable single-point data. 1) To be published. (Revision of ISO 62:1980) 2) To be published. (Revision of179:1993) 3) To be published. (Revision of ISO1210:1992) 4) To be published. (Revision of ISO31
32、46:1985) BSI 2008 BS EN ISO 11542-2:19982 ISO 11542-1:1994, Plastics Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials Part1: Designation system and basis for specifications. IEC 60093:1980, Methods of test for volume resistivity and surface resistivity of solid ele
33、ctrical insulating materials. IEC 60112:1979, Method for determining the comparative and the proof tracking indices of solid insulating materials under moist conditions. IEC 60243-1:1998, Electrical strength of insulating materials Test methods Part1:Tests at power frequencies. IEC 60250:1969, Recom
34、mended methods for the determination of the permittivity and dielectric dissipation factor of electrical insulating materials at power, audio and radio frequencies including metre wavelengths. IEC 60296:1982, Specification for unused mineral insulating oils for transformers and switchgear. 3 Prepara
35、tion of test specimens It is essential that specimens are always prepared by the same procedure using the same conditions. The test specimens shall be prepared by compression moulding. 3.1 Treatment of the material before moulding Before processing, no pretreatment of the material sample is normally
36、 necessary. 3.2 Compression moulding Compression-moulded sheets shall be prepared in accordance with ISO293 using the conditions specified in Table 1. The test specimens for the determination of the properties shall be machined from the compression-moulded sheets in accordance with ISO2818 or stampe
37、d. A type 1 (frame) mould may be used, but it is necessary to start cooling whilst simultaneously applying the full pressure. This avoids the melt being pressed out of the frame and avoids sink marks. For thicker sheet ( 4mm), a type2 (positive) mould has been found to work satisfactorily. The prehe
38、ating time depends on the type of mould and the type of energy input (steam, electricity). For frame moulds,5min is usually sufficient but for positive moulds, due to the bigger mass, a preheating time of5min to15min can be necessary, especially if electric heating is used. 4 Conditioning of test sp
39、ecimens Test specimens shall be conditioned in accordance with ISO291 for at least40h at23C 2 C and(50 5)% relative humidity. 5 Determination of properties In the determination of properties and the presentation of data, the standards, supplementary instructions and notes given in ISO10350 shall be
40、applied. All tests shall be carried out in the standard atmosphere of23C 2 C and(50 5)% relative humidity unless specifically stated otherwise in the tables which follow. Table 2 is compiled from ISO10350, and the properties listed are those which are appropriate to PE-UHMW moulding and extrusion ma
41、terials. These properties are those considered useful for comparisons of data generated for different thermoplastics. Table 3 contains those properties, not found specifically in Table 2, which are in wide use or of particular significance in the practical characterization of PE-UHMW moulding and ex
42、trusion materials. Table 1 Compression-moulding conditions Material Moulding temperature C Average cooling rate C/min Demoulding temperature C Full pressure MPa Full-pressure time min Preheating pressure MPa Preheating time min All grades 210 15 u 40 10 30 5 5 to15 BSI 2008 BS EN ISO 11542-2:19983 T
43、able 2 General properties and test conditions (selected from ISO10350) Property Unit Standard Specimen type (dimension in mm) Test conditions and supplementary instructions Mechanical properties Tensile modulus Yield stress Yield strain Nominal strain at break Stress at50% strain Stress at break Str
44、ain at break MPa MPa % % MPa MPa % ISO 527-1, ISO 527-2 ISO 527-4 See ISO 3167 Test speed 1 mm/min Test speed 50 mm/min Test speed 50 mm/min Test speed 50 mm/min Test speed 50 mm/min Test speed 5 mm/min. Only to be quoted if strain at break is 10 % Tensile creep modulus MPa ISO 899-1 See ISO 3167 At
45、 1 h At 1000h Strain u 0,5 % Flexural modulus Tensile notched impact strength MPa kJ/m 2 ISO 178 ISO 8256 80 10 4 80 10 4 double V-notch, r = 1 Test speed 2 mm/min Thermal properties Melting temperature Temperature of deflection under load C C ISO 3146 ISO 75-1, ISO 75-2 Powder 110 10 4 edgewise or
46、80 10 4 flatwise Method C (DSC or DTA). Use 10C/min. 0,45 MPa and 1,8 MPa Coefficient of linear thermal expansion C 1 TMA (see ISO 10350) Prepared from ISO 3167 Parallel Normal Quote the secant value over the temperature range 23C to 55C Flammability Ignitability mm/min % ISO 1210 ISO 4589-1, ISO 45
47、89-2 125 13 3 80 10 4 Method A linear burning rate of horizontal specimens Procedure A top surface ignition Electrical properties Relative permittivity Dissipation factor IEC 250 W 80 W 80 1 Frequency 100 Hz and 1 MHz (compensate for electrode edge effect) Volume resistivity Surface resistivity 7m 7
48、 IEC 93 W 80 W 80 1 Voltage 100 V Electric strength KV/mm IEC 243-1 W 80 W 80 1 W 80 W 80 3 Use 25 mm/75 mm coaxial-cylinder electrode configuration. Immerse in IEC296 transformer oil. Use shod time (rapid rise) test Comparative tracking index IEC 112 W 15 W 15 4 Use solution A Other properties Water absorption Density % Kg/m 3 ISO 62 ISO 1183 50 50 3 or 50 3 disc 10 10 4 24 h immersion in water at 23 C Test specimen to be taken from moulded specimen BSI 2008 BS EN ISO 11542-2:1998
