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1、 Reference number ISO 2897-2:2003(E) ISO 2003 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 and determination of properties Plastiques Polystyrnes rsistants au choc (PS-I)
2、 pour moulage et extrusion Partie 2: Prparation des prouvettes et dtermination des proprits -,-,- ISO 2897-2:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typeface
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5、vent that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocop
6、ying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzer
7、land ii ISO 2003 All rights reserved -,-,- ISO 2897-2:2003(E) ISO 2003 All rights reserved iii Contents Page Forewordiv 1 Scope1 2 Conformance.1 3 Normative references .1 4 Preparation of test specimens.3 5 Conditioning of test specimens 3 6 Determination of properties.4 -,-,- ISO 2897-2:2003(E) iv
8、ISO 2003 All rights reserved 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 interest
9、ed 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 Co
10、mmission (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 techn
11、ical 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 s
12、hall 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 replaces the second edition (ISO 2897-2:1994), which has been technically revised
13、. 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: Preparation of test specimens and determination of properties -,-,- INTERNATIONAL STANDAR
14、D ISO 2897-2:2003(E) ISO 2003 All rights reserved 1 Plastics 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 specimens and the tes
15、t 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 preparation of test
16、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 the general test
17、 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 test results, it i
18、s 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 procedures. 2 Conforman
19、ce 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 references The follo
20、wing 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 water absorption IS
21、O 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 -,-,- ISO 2897-2:2003(E) 2 ISO 2003 All rights reserved ISO 293: 1986, P
22、lastics Compression moulding 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
23、 of Vicat softening temperature (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 c
24、omposites ISO 899-1:1993, 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 n
25、on-cellular plastics ISO 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: Design
26、ation system and basis 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 sin
27、gle-point data ISO11357-2:1999, 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 co
28、mparative and the proof 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 dis
29、sipation 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 IEC 60695-11-10:1999, Fire hazard testing Part 11-10: Test flames 50 W horizontal and
30、vertical flame test methods IEC 60695-11-20:1999, Fire hazard testing Part 11-20: Test flames 500 W flame test methods -,-,- ISO 2897-2:2003(E) ISO 2003 All rights reserved 3 4 Preparation of test specimens 4.1 General It is essential that specimens always be prepared by the same procedure (either i
31、njection moulding or compression moulding), using the same processing 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
32、 shall be expressed as a percentage of the total mass of the 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, usin
33、g the conditions specified in Table 1, in which the temperature 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-reta
34、rdant grades may show discoloration if moulded at a melt temperature 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 te
35、mperature given is a target value (see ISO 293 for tolerances). 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 Mo
36、ulding temperature C Average cooling rate C/min Demoulding temperature 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 humidit
37、y. -,-,- ISO 2897-2:2003(E) 4 ISO 2003 All rights reserved 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
38、 of (23 2) C and (50 10) % relative humidity, unless specifically stated otherwise in Table 3. Table 3 is compiled from ISO 10350, and the properties listed are those which are appropriate to impact- resistant polystyrene moulding and extrusion materials. These properties are those considered useful
39、 for comparisons of data generated for different thermoplastics. Table 4 contains those properties, not found specifically in Table 3, which are in wide use or of particular significance in the practical characterization of impact-resistant polystyrene moulding and extrusion materials. Table 3 Gener
40、al properties and test conditions (selected from ISO 10350) Property Unit Test method Specimen type (dimensions in mm) Specimen preparation Test conditions and supplementary instructions Rheological properties Melt mass-flow rate g/10 min Melt volume-flow rate cm3/10 min ISO 1133 Moulding compound 2
41、00 C, load 5 kg. Mechanical properties Tensile modulus Test speed 1 mm/min. Yield stress MPa Test speed 50 mm/min. Yield strain Test speed 50 mm/min. Strain at break % Test speed 50 mm/min. Stress at 50 % strain MPa ISO 527-2, ISO 527-4 Test speed 50 mm/min. Only to be quoted if no yielding is obser
42、ved up to 50 % nominal strain. At 1 h Tensile creep modulus MPa ISO 899-1 ISO 3167 At 1 000 h Strain u 0,5 % Flexural modulus Flexural strength MPa ISO 178 80 10 4 Test speed 2 mm/min. Charpy impact strength 80 10 4 Charpy notched impact strength ISO 179 80 10 4 V-notch, r = 0,25 Edgewise impact. Al
43、so record type of failure. Tensile notched impact strength kJ/m2 ISO 8256 80 10 4 double V-notch, r = 1 Injection moulding Only to be quoted if fracture cannot be obtained with notched Charpy impact test. -,-,- ISO 2897-2:2003(E) ISO 2003 All rights reserved 5 Table 3 (continued) Property Unit Test
44、method Specimen type (dimensions in mm) Specimen preparation Test conditions and supplementary instructions Thermal properties Glass transition temperature C ISO 11357-2 Moulding compound Record midpoint temperature. Use 10 C/min. Temperature of deflection under load C ISO 75-2 80 10 4 0,45 MPa and
45、1,8 MPa. Vicat softening temperature C ISO 306 10 10 4 Heating rate 50 C /h, load 50 N. IEC 60695-11-10 125 13 3 Record one of classifications V-0, V-1, V-2, HB40, HB75. Burning behaviour mm/min IEC 60695-11-20 150 150 3 Record one of classifications 5VA, 5VB, N. Oxygen Index % ISO 4589 80 10 4 Inje
46、ction moulding Procedure A top surface ignition. Electrical properties 100 Hz Relative permittivity 1 MHz 100 Hz Dissipation factor IEC 60250 1 MHz Compensate for electrode edge effects. Volume resistivity m 1-minute value. Surface resistivity IEC 60093 W 80 W 80 1 Compression moulding Voltage 100 V
47、 Use contacting line electrodes 1 mm to 2 mm wide, 50 mm long and 5 mm apart. W 80 W 80 1 Compression moulding Electric strength kV/mm IEC 60243-1 W 80 W 80 3 Injection moulding Use 25 mm/75 mm coaxial- cylinder electrodes. Immerse in transformer oil in accordance with IEC 60296. Use a 20 s step-by-
48、step test. Comparative tracking index IEC 60112 W 15 W 15 4 Injection moulding Use solution A. Other properties Saturation value in water at 23 C. Water absorption % ISO 62 Thickness u 1 Compression moulding Equilibrium value at 23 C, 50 % relative humidity. Density kg/m3 ISO 1183 10 10 4 Injection moulding Specimen to be taken f