1、BSI Standards PublicationBS ISO 13931:2013Carbon fibre Determinationof volume resistivityBS ISO 13931:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 13931:2013.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/42, Fibre reinf
2、orced thermosetting plastics andprepregs.A list of 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 In
3、stitution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 69035 8ICS 59.100.20Compliance 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 2013.Amendments
4、issued since publicationDate Text affectedBS ISO 13931:2013 ISO 2013Carbon fibre Determination of volume resistivityFibres de carbone Dtermination de la rsistivit transversaleINTERNATIONAL STANDARDISO13931First edition2013-07-01Reference numberISO 13931:2013(E)BS ISO 13931:2013ISO 13931:2013(E)ii IS
5、O 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet
6、, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in
7、SwitzerlandBS ISO 13931:2013ISO 13931:2013(E) ISO 2013 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 Health and safety 14 Principle 15 Method A Test method for single filament . 15.1 Apparatus . 15.2 Test specimen . 15.3 Procedure 26 Method B Test method for str
8、and 26.1 Apparatus 26.2 Test specimen . 26.3 Procedure 27 Test report . 4BS ISO 13931:2013ISO 13931:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is nor
9、mally 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 in
10、the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular th
11、e different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directivesAttention is drawn to the possibility that some of the elements of this document ma
12、y be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAn
13、y trade name used in this document is information given for the convenience of users and does not constitute an endorsement.The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibres.iv ISO 2013 All rights reservedBS ISO 13931:2013INTE
14、RNATIONAL STANDARD ISO 13931:2013(E)Carbon fibre Determination of volume resistivity1 ScopeThis International Standard specifies two methods (i.e. method A and method B) for the determination of the volume resistivity of carbon fibre.2 Normative referencesThe following documents, in whole or in part
15、, are normatively referenced in this document and are indispensable to its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1889, Reinforcement yarns Determination of linear
16、 densityISO 10119, Carbon fibre Determination of densityISO 10548, Carbon fibre Determination of size contentISO 11567, Carbon fibre Determination of filament diameter and cross-sectional area3 Health and safetyThis International Standard is limited to describing the determination of the volume resi
17、stivity of carbon fibre. The handling conditions of the test, specimens, apparatus and reagents used are intended to comply with the national regulations in force in each country, and the staff shall be informed of the hazards involved and appropriate precautions to be taken.4 PrincipleThe volume re
18、sistivity is determined by the resistance of the material, and the length and a cross-section of the test specimen. The resistance and length of test specimen are measured. Method A specifies the determination of the volume resistivity for a single filament. The cross-section of single filament assu
19、mes that the cross-section of the test specimen is a true circle, and it is calculated from the diameter of the test specimen. Method B specifies the determination of the volume resistivity for a strand of fibres. The cross-section of the strand is calculated from the density and linear density of t
20、he test specimen.5 Method A Test method for single filament5.1 Apparatus5.1.1 Length meter, accurate to 0,1 mm.5.1.2 DC resistance meter, with a precision of 0,5 % or higher.5.2 Test specimen5.2.1 Take a 40-mm to 50-mm length of filament yarn from the sample and open out the yarn structure. Pick out
21、 single filaments, one by one, for use as test specimens.5.2.2 Stretch a single filament along the centreline of the mounting tab/template (see key item 1 of Figure 1) as shown in Figure 1, and affix at the two end points of the window cut-out using conductive ISO 2013 All rights reserved 1BS ISO 13
22、931:2013ISO 13931:2013(E)adhesive (see key item 3 of Figure 1). Simultaneously, affix a copper wire together with the test specimen using the conductive adhesive to be used as a lead wire. Prepare at least three test specimens.NOTE The mounting template is cardboard of approximately 0,3 mm in thickn
23、ess . A hole of (25 0,5) mm in length is punched or cut out.Dry the adhesive completely, as the measured resistance can be unstable due to any remaining solvent in the conductive adhesive.5.3 Procedure5.3.1 Using a length meter (accurate to the nearest 0,1 mm) measure the distance of the stretched f
24、ibre between the two points of contact of the conductive adhesive on the test specimen, which is attached to the mounting tab. Make this length the gauge length for measuring the resistance.5.3.2 Measure the resistance of the test specimen using the resistance meter.5.3.3 Calculate the volume resist
25、ivity, Sf, according to Formula (1):SDf= 4x 10ff-9pi 2RL(1)whereSfis the volume resistivity ( m);Rfis the resistance of the test specimen ();Lfis the gauge length of the test specimen (mm);D is the diameter of the test specimen (mm) (specified in ISO 11567).6 Method B Test method for strand6.1 Appar
26、atus6.1.1 Length meter, accurate to 0,1 mm.6.1.2 DC resistance meter, with precision of 0,5 % or higher.6.1.3 Electrode, copper plate with a clean and flat surface (see Figure 2).6.2 Test specimen6.2.1 Take the test specimen from the bundle of fibre. Prepare three test specimens, at least.6.2.2 Wher
27、e there is a large amount of water or sizing, which might influence the result, a pretreatment, such as drying the test specimen or size removal, in accordance with ISO 10548, is necessary.6.3 Procedure6.3.1 Set two electrodes 50 mm to 2 000 mm apart on an insulating board, and measure the distance
28、between the electrodes to the nearest 1 mm (see Figure 2). An example of an electrode is shown in Figure 2.6.3.2 Fix one end of a test specimen to one electrode and the other end to the other electrode, taking care to avoid sagging of the test specimen.2 ISO 2013 All rights reservedBS ISO 13931:2013
29、ISO 13931:2013(E)6.3.3 Attach the resistance meter across the two electrodes, as shown in Figure 2. Withn approximately 30 s of turning the meter on, read the resistance between the two electrodes.6.3.4 Calculate the volume resistivity, Ss, according to Formula (2):Ss= x x 10sss -6RLT(2)whereSsis th
30、e volume resistivity ( m);Rsis the resistance of the test specimen ();Lsis the length of the test specimen (mm);Tsis the linear density of strand (tex) (specified in ISO 1889); is the density of strand (g/cm3) (specified in ISO 10119).Dimensions in millimetresKey1 centreline of the mounting template
31、2 test specimen (single fibre)3 conductive adhesiveFigure 1 Mounting tab for method A (for single filament) ISO 2013 All rights reserved 3BS ISO 13931:2013ISO 13931:2013(E)Dimensions in millimetresKey1 resistance meter2 test specimen3 electrode (copper)4 fastening nut5 test sample6 terminal7 insulat
32、ing board8 length meterFigure 2 Apparatus for method B (for strand)7 Test reportThe test report shall include the following information;a) a reference to this International Standard, i.e. ISO 13931, indicating the method used (i.e. method A or B);b) complete identification of the material tested, in
33、cluding type, source, manufacturers code number and previous history, where these are known;c) date of test;d) number of test specimens tested;e) dimension of the test specimens;f) temperature, humidity and time for conditioning of test specimens;4 ISO 2013 All rights reservedBS ISO 13931:2013ISO 13
34、931:2013(E)g) the test result for each individual test specimen, and, if specified by the party requesting the test, the mean value of all test specimens;h) any other necessary information. ISO 2013 All rights reserved 5BS ISO 13931:2013ISO 13931:2013(E) ISO 2013 All rights reservedICS 59.100.20Pric
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