1、BS ISO11357-6:2008ICS 83.080.01NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDPlastics Differentialscanning calorimetry(DSC)Part 6: Determination of oxidationinduction time (isothermal OIT) andoxidation induction temperature(dynamic OIT)BS EN ISO11357-6:2013BS
2、EN ISO 11357-6:2013ISBN 978 0 580 78960 1Amendments/corrigenda issued since publicationDate Comments30 April 2013 This corrigendum renumbers BS ISO 11357-6:2008as BS EN ISO 11357-6:2013This British Standard waspublished under the authorityof the Standards Policy andStrategy Committee on 28 February
3、2009 The British Standards Institution 2013.Published by BSI StandardsLimited 2013National forewordThis British Standard is the UK implementation of EN ISO 11357-6:2013. It is identical to ISO 11357-6:2008. It supersedes BS ISO 11357-6:2008 whichis withdrawn.The UK participation in its preparation w
4、as entrusted to Technical CommitteePRI/21, Testing of plastics.A list of organizations represented on this committee can be obtained onrequest to its secretary.The publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application.Com
5、pliance with a British Standard cannot confer immunity fromlegal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11357-6 January 2013 ICS 83.080.01 English Version Plastics - Differential scanning calorimetry (DSC) - Part 6: Determination of oxidation induction time (isothermal
6、OIT) and oxidation induction temperature (dynamic OIT) (ISO 11357-6:2008) Plastiques - Analyse calorimtrique diffrentielle (DSC) - Partie 6: Dtermination du temps dinduction loxydation (OIT isotherme) et de la temprature dinduction loxydation (OIT dynamique) (ISO 11357-6:2008) Kunststoffe - Dynamisc
7、he Differenz-Thermoanalyse (DSC) - Teil 6: Oxidations-Induktionszeit (isothermische OIT) oder - Temperatur (isodynamische OIT) (ISO 11357-6:2008) This European Standard was approved by CEN on 22 December 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
8、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 obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standa
9、rd 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the natio
10、nal standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slov
11、akia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved w
12、orldwide for CEN national Members. Ref. No. EN ISO 11357-6:2013: EEN ISO 11357-6:2013 (E) 3 Foreword The text of ISO 11357-6:2008 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 11357-6:2013 b
13、y 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 July 2013, and conflicting national standards shall be withdraw
14、n at the latest by July 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. According to the CEN/CENELEC Internal Regulations, the n
15、ational standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
16、Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 11357-6:2008 has been approved by CEN as a EN ISO 11357-6:2013 without any modification. BS EN ISO 11357-6:2
17、013EN ISO 11357-6:2013 (E)BS ISO 11357-6:2008ISO 11357-6:2008(E)PDF disclaimerThisPDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed butshall not be edited unless the typefaces which are embedded are licensed to and installed on th
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20、ral Secretariat at the address given below.COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwisespecified, no part of this publicationmay be reproduced or utilized in any form or by any means,electronic or mechanical, including photocopying and microfilm, without permission in
21、writing from either ISO at the address below orISOs member body in the country of the requester.ISO copyright officeCase 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 inSwitzerland ii ISO 2008 All rights reservedBS EN ISO
22、11357-6:2013ISO 11357-6:2008(E)BS ISO 11357-6:2008ISO 11357-6:2008(E) ISO 2008 All rights reserved iiiContents PageForeword ivIntroduction v1Scope . 12Normative references. 13Terms and definitions. 24Principle. 25Apparatus and materials 36Test specimens. 47Test conditions and specimen conditioning .
23、 58Calibration. 59Procedure 510 Expression of results. 811 Precision and bias 1012 Test report. 10Bibliography. 12BS EN ISO 11357-6:2013ISO 11357-6:2008(E)BS ISO 11357-6:2008ISO 11357-6:2008(E)iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a world
24、wide 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 interested in a subject for which a technical committee has beenestablished has the right to be represented on th
25、at committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closelywith the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in a
26、ccordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requ
27、ires 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 shall not be held responsible for identifying any or all such patent rights. ISO 11357-6 was prepared by Techn
28、ical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-chemical properties. This second edition cancels and replaces the first edition (ISO 11357-6:2002), which has been technically revised. The most important changes in the revision are the following: a dynamic OIT method, i.e. the measure
29、ment of oxidation induction temperature, has been included; it is nowpossible to perform measurements in air as well as in oxygen; the range of specimen sizes has been narrowed and specimen size has been redefined in terms ofthickness instead of mass; the possibility of making single-point routine m
30、easurements with reduced accuracy has been included. ISO 11357 consists of the following parts, under the general title Plastics Differential scanning calorimetry(DSC): Part 1: General principles Part 2: Determination of glass transition temperature Part 3: Determination of temperature and enthalpy
31、of melting and crystallization Part 4: Determination of specific heat capacity Part5: Determination of characteristic reaction-curve temperatures and times, enthalpy of reaction and degree of conversion Part6: Determination of oxidation induction time (isothermal OIT) and oxidation induction tempera
32、ture (dynamic OIT) Part 7: Determination of crystallization kineticsBS EN ISO 11357-6:2013ISO 11357-6:2008(E)BS ISO 11357-6:2008ISO 11357-6:2008(E) ISO 2008 All rights reserved vIntroduction It should benotedthat the measurement of oxidation induction time or temperature described in this part ofISO
33、 11357 provides a tool to assess the conformity of the material tested to a given formulation of plasticscompounds, but it is not intended to provide the concentration of antioxidant. Different antioxidants may havedifferent oxidation induction times or temperatures. Due to interaction of the antiox
34、idant with other substances in the formulation, different oxidation induction times or temperatures may result evenwith products havingthe same type and concentration of antioxidant. BS EN ISO 11357-6:2013ISO 11357-6:2008(E)BS ISO 11357-6:2008BS EN ISO 11357-6:2013BS ISO 11357-6:2008INTERNATIONAL ST
35、ANDARD ISO 11357-6:2008(E) ISO 2008 All rights reserved 1Plastics Differential scanning calorimetry (DSC) Part 6: Determination of oxidation induction time (isothermal OIT) and oxidation induction temperature (dynamic OIT)SAFETY STATEMENT Persons using this document should be familiarwith normal lab
36、oratorypractice, 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 healthpractices and to ensure compliance with any regulatory requirements. 1 Scope This part
37、of ISO 11357 specifies methods for the determination of oxidation induction time (isothermal OIT)and oxidation induction temperature (dynamic OIT)of polymeric materials bymeans of differential scanningcalorimetry (DSC). It is applicable to polyolefin resins that are in a fully stabilized or compound
38、ed form, eitheras raw materials or finished products. It may be applicable to other plastics.2 NormativereferencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated references, the latest edition
39、 of the referenceddocument (including any amendments) applies.ISO 293, Plastics Compression moulding of test specimens of thermoplastic materialsISO 294-3, Plastics Injection moulding of test specimens of thermoplastic materials Part 3: Small platesISO 472, Plastics V ocabularyISO 1872-2, Plastics P
40、olyethylene (PE) moulding and extrusion materials Part2: Preparation of testspecimens and determination of propertiesISO 1873-2, Plastics Polypropylene (PP) moulding and extrusion materials Part 2: Preparation of testspecimens and determination of propertiesISO 8986-2, Plastics Polybutene (PB) mould
41、ingand extrusion materials Part2: Preparation of testspecimens and determination of propertiesISO 11357-1:1), Plastics Differential scanning calorimetry (DSC) Part1: General principles1) To be published. (Revision of ISO 11357-1:1997) BS EN ISO 11357-6:2013BS ISO 11357-6:2008ISO 11357-6:2008(E)2 ISO
42、 2008 All rights reserved3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 472 and ISO 11357-1 and the following apply: 3.1 oxidation induction time (isothermal OIT)relative measure of a stabilized materials resistance to oxidative decomposition, deter
43、mined by the calorimetric measurement of the time interval to the onset of exothermic oxidation of the material at a specified temperature in an oxygen or air atmosphere, underatmospheric pressureNOTE It is expressed in minutes (min). 3.2 oxidation induction temperature (dynamic OIT)relative measure
44、 of a stabilized materials resistance to oxidative decomposition, determined by the calorimetric measurement of the temperature of the onset of exothermic oxidation of the material whensubjected to a specified heating rate in an oxygen or air atmosphere, under atmospheric pressureNOTE It is expresse
45、d in degrees Celsius (C). 4 Principle 4.1 General The time for which, or the temperature up to which, an antioxidant stabilizer system present in a test specimeninhibits oxidation is measured while the specimen is held isothermally at a specified temperature or heated ata constant rate in an oxygen
46、or air atmosphere. The oxidation induction time or temperature is an assessment of the level (or degree) of stabilization of the material tested. Higher testtemperatures will result in shorteroxidation induction times; faster heating rates will result in higher oxidation induction temperatures. Theo
47、xidation induction time and temperature are also dependent on the surface area of the specimen availablefor oxidation. It should be noted that tests carried out in pure oxygenwill result in a lower oxidation induction time or temperature than tests performed under normal atmospheric-air conditions.
48、NOTE The oxidation induction time or temperature can be indicative of the effective antioxidant level present in thetest specimen. Caution should be exercised in data interpretation, however, since oxidation reaction kinetics are a functionof temperature and the inherent properties of the additives
49、contained in the sample. For example, oxidation induction timeor temperature results are often used to select optimum resin formulations. Volatile antioxidants or differences in activationenergies of oxidation reactions may generate poor oxidation induction time or temperature results, even though the antioxidants may perform adequately at the intended temperature of use of the finished product. 4.2Oxidation induction time (isothermalOIT)The specimen and a reference material are heated at a c
