1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 3673-2:2012Plastics Epoxy resinsPart 2: Preparation of test specimens anddetermination of properties of crosslinkedepoxy resins (ISO 3673-2:2012)BS EN ISO 3673-2:2012 B
2、RITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO3673-2:2012. It supersedes BS EN ISO 3673-2:2000 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/42, Fibre reinforced thermosetting plastics andprepregs.A list of
3、 organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited
4、2012ISBN 978 0 580 74659 8ICS 83.080.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 August 2012.Amendments issued since publicationDate Text affectedEUROPEAN
5、 STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3673-2 July 2012 ICS 83.080.10 Supersedes EN ISO 3673-2:1999English Version Plastics - Epoxy resins - Part 2: Preparation of test specimens and determination of properties of crosslinked epoxy resins (ISO 3673-2:2012) Plastiques - Rsines poxydes - Par
6、tie 2: Prparation des prouvettes et dtermination des proprits des rsines poxydes rticules (ISO 3673-2:2012) Kunststoffe - Epoxidharze - Teil 2: Herstellung von Probekrpern und Bestimmung von Eigenschaften von vernetzten Epoxidharzen (ISO 3673-2:2012) This European Standard was approved by CEN on 14
7、July 2012. 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-to-date lists and bibliographical references concerning such national standards may be ob
8、tained on application to the CEN-CENELEC Management Centre 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 the responsibility of a CEN member into its own language and notified to the
9、CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Irela
10、nd, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue M
11、arnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3673-2:2012: EBS EN ISO 3673-2:2012EN ISO 3673-2:2012 (E) 3 Foreword This document (EN ISO 3673-2:2012) has been prepared by Technical Committee ISO
12、/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by NBN. 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 January 2013, and confli
13、cting national standards shall be withdrawn at the latest by January 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This docume
14、nt supersedes EN ISO 3673-2:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav
15、Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 3673-2:2012 has be
16、en approved by CEN as a EN ISO 3673-2:2012 without any modification. BS EN ISO 3673-2:2012ISO 3673-2:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Normative references . 13 Preparation of test specimens . 23.1 General . 23.2 Pretreatment of materials 23.3 Preparation of
17、test sheets . 23.4 Cutting out test specimens . 43.5 Conditioning test specimens . 44 Determination of properties . 4Bibliography . 6BS EN ISO 3673-2:2012ISO 3673-2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
18、ber 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 represented on that committee. International organizations, governmen
19、tal 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 drafted in accordance with the rules given in the ISO/IEC Direct
20、ives, 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 Standard requires approval by at least 75 % of the member bodies
21、 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 3673-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12
22、, Thermosetting materials.This third edition cancels and replaces the second edition (ISO 3673-2:2007), which has been revised to make it clear that it applies only to crosslinked epoxy resins.ISO 3673 consists of the following parts, under the general title Plastics Epoxy resins: Part 1: Designatio
23、n Part 2: Preparation of test specimens and determination of properties of crosslinked epoxy resinsiv ISO 2012 All rights reservedBS EN ISO 3673-2:2012INTERNATIONAL STANDARD ISO 3673-2:2012(E)Plastics Epoxy resins Part 2: Preparation of test specimens and determination of properties of crosslinked e
24、poxy resinsSAFETY STATEMENT Persons using this document should be familiar with normal laboratory practice, if applicable. This document does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and h
25、ealth practices and to ensure compliance with any regulatory requirements.1 ScopeThis part of ISO 3673 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of crosslinked epoxy resins. The properties determined have been selected from t
26、he general test methods in ISO 10350-1:2007.Test methods for the determination of the properties of non-crosslinked epoxy resins are not included in this part of ISO 3673.NOTE Test methods for non-crosslinked epoxy resins are specified in ISO 18280.In order to obtain reproducible and comparable test
27、 results, it is necessary to use the test methods, sample preparation and conditioning, and specimen dimensions specified herein. Values determined will not necessarily be identical to those obtained using test specimens of different dimensions or prepared using different procedures.Other standards
28、exist concerning the determination of properties and preparation of test specimens for epoxy-based products, to which reference will be made, if required.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the ed
29、ition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 62, Plastics Determination of water absorptionISO 75-2, Plastics Determination of temperature of deflection under load Part 2: Plastics and eboniteISO 178, Plastics Deter
30、mination of flexural propertiesISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact testISO 179-2, Plastics Determination of Charpy impact properties Part 2: Instrumented impact testISO 527-2, Plastics Determination of tensile properties Part 2: Test conditio
31、ns for moulding and extrusion plasticsISO 2577, Plastics Thermosetting moulding materials Determination of shrinkageISO 2818, Plastics Preparation of test specimens by machiningISO 3167, Plastics Multipurpose test specimensISO 4589-2, Plastics Determination of burning behaviour by oxygen index Part
32、2: Ambient-temperature test ISO 2012 All rights reserved 1BS EN ISO 3673-2:2012ISO 3673-2:2012(E)ISO 10350-1:2007, Plastics Acquisition and presentation of comparable single-point data Part 1: Moulding materialsISO 11357-2, Plastics Differential scanning calorimetry (DSC) Part 2: Determination of gl
33、ass transition temperatureISO 11359-2, Plastics Thermomechanical analysis (TMA) Part 2: Determination of coefficient of linear thermal expansion and glass transition temperatureIEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materialsIEC 60112
34、, Method for the determination of the proof and the comparative tracking indices of solid insulating materialsIEC 60243-1, Electrical strength of insulating materials Test methods Part 1: Tests at power frequenciesIEC 60250, Recommended methods for the determination of the permittivity and dielectri
35、c dissipation factor of electrical insulating materials at power, audio and radio frequencies including metre wavelengthsIEC 60296, Fluids for electrotechnical applications Unused mineral insulating oils for transformers and switchgearIEC 60695-11-10, Fire hazard testing Part 1110: Test flames 50 W
36、horizontal and vertical flame test methodsIEC 60695-11-20, Fire hazard testing Part 1120: Test flames 500 W flame test methods3 Preparation of test specimens3.1 GeneralThis procedure is used only for the determination of crosslinked-resin properties.It is essential that specimens are always prepared
37、 by the same procedure, using the same processing conditions. The specimens on which the properties are measured shall be cut from sheets of crosslinked resin, produced by a casting process. In view of the numerous possible fields of application for epoxy resins, the choice was made to prepare test
38、specimens from resins not containing any filler or reinforcement in order to obtain the intrinsic properties of the crosslinked polymer, free of structural additives.Sheets of thermosetting resin shall be manufactured at 2 mm, 3 mm and 4 mm thickness, as required, for the tests in Table 1. A suffici
39、ent number shall be produced to determine those properties required.3.2 Pretreatment of materialsBefore casting, no treatment of the epoxy resin sample is normally necessary. If a pretreatment is required, this shall be in accordance with the manufacturers recommendations.3.3 Preparation of test she
40、ets3.3.1 Apparatus3.3.1.1 Two glass plates or two polished stainless-steel plates, each having a thickness of 6 mm and approximate dimensions of 300 mm 350 mm.Other materials, such as silicone, may also be used.3.3.1.2 Shims, having a thickness of 2 mm, 3 mm and 4 mm.3.3.1.3 Silicone or latex joint,
41、 having a diameter of 5 mm.3.3.1.4 Device for clamping and holding the plates.2 ISO 2012 All rights reservedBS EN ISO 3673-2:2012ISO 3673-2:2012(E)3.3.1.5 Device for removing air bubbles from the reaction mixture (see 3.3.3.4), preferably a centrifuge, or a vacuum dessicator allowing the plate/joint
42、/shim assembly to be put under a static vacuum.3.3.1.6 Stirrer, for mixing the resin and crosslinking agent (e.g. a glass rod).3.3.1.7 Glass beaker, capacity 500 ml.3.3.1.8 Laboratory balance, accurate to 0,1 g.3.3.1.9 Laboratory oven, set at the temperature chosen for carrying out the post-treatmen
43、t of the epoxy resin.3.3.2 Reagents3.3.2.1 Crosslinking agent, specific to epoxy resins (e.g. methyltetrahydrophthalic anhydride) (see warning in 3.3.3.5).3.3.2.2 Crosslinking accelerator, e.g. 2,4,6-tris(dimethylaminomethyl)phenol or N,N-dimethyl-benzylamine.3.3.2.3 External release agent, which do
44、es not modify the properties of the crosslinked resin.3.3.3 Procedure3.3.3.1 Coat the plates (3.3.1.1) with a thin layer of release agent (3.3.2.3). Polish them until they shine in order to ensure that the crosslinked-resin sheet produced has a high-quality surface finish.3.3.3.2 Arrange the silicon
45、e or latex joint (3.3.1.3) and the selected shim (2 mm, 3 mm or 4 mm) (3.3.1.2) between the two plates as shown in Figure 1. Clamp the assembly with a suitable clamp (3.3.1.4) and position vertically.Key1 joint2 glass or steel plates3 shimsFigure 1 Apparatus for preparing test sheets ISO 2012 All ri
46、ghts reserved 3BS EN ISO 3673-2:2012ISO 3673-2:2012(E)3.3.3.3 Using a laboratory balance (3.3.1.8), weigh the following reagents into a glass beaker (3.3.1.7): 100 g of epoxy resin; methyltetrahydrophthalic anhydride at an anhydride/epoxy equivalent ratio of 0,9/1; 0,5 phr (parts per hundred parts o
47、f epoxy resin, by mass) of 2,4,6-tris(dimethylaminomethyl)phenol;or2 phr (parts per hundred parts of epoxy resin, by mass) of N,N-dimethylbenzylamine.Using the stirrer (3.3.1.6), mix until homogeneous, avoiding the introduction of air bubbles as much as possible.3.3.3.4 Remove any air bubbles from t
48、he mixture using the centrifuge (see 3.3.1.5), then carefully pour the mixture into the plate/joint/shim assembly without trapping any air bubbles in the resin. In the absence of a centrifuge, once the assembly is filled with the reactant mixture, place it vertically in a vacuum desiccator (see 3.3.
49、1.5) and apply a static vacuum for the time required to remove all air bubbles.When the viscosity of the mixture is high, air bubbles can be removed at an elevated temperature (e.g. 100 C). In this case, the amount of accelerator has to be decreased. For example, use 0,25 phr of 2,4,6-tris(dimethylaminomethyl)phenol or 1 phr of N,N-dimethylbenzylamine.3.3.3.5 Maintain the assembly in the vertical position while crosslinking in the laboratory oven (3.3.1.9). If using methylte
