EN ISO 22007-4:2012

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Polimerni materiali - Ugotavljanje toplotne prevodnosti in toplotne razprševalnosti - 4. del: Metoda z laserskim bliskom (ISO 22007-4:2008)Kunststoffe - Bestimmung der Wärmeleitfähigkeit und der Temperaturleitfähigkeit - Teil 4: Laserblitzverfahren (ISO 22007-4:2008)Plastiques - Détermination de la conductivité thermique et de la diffusivité thermique - Partie 4: Méthode flash laser (ISO 22007-4:2008)Plastics - Determination of thermal conductivity and thermal diffusivity - Part 4: Laser flash method (ISO 22007-4:2008)83.080.01Polimerni materiali na splošnoPlastics in generalICS:Ta slovenski standard je istoveten z:EN ISO 22007-4:2012SIST EN ISO 22007-4:2012en,fr,de01-marec-2012SIST EN ISO 22007-4:2012SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 22007-4
January 2012 ICS 83.080.01 English Version
Plastics - Determination of thermal conductivity and thermal diffusivity - Part 4: Laser flash method (ISO 22007-4:2008)
Plastiques - Détermination de la conductivité thermique et de la diffusivité thermique - Partie 4: Méthode flash laser (ISO 22007-4:2008)
Kunststoffe - Bestimmung der Wärmeleitfähigkeit und der Temperaturleitfähigkeit - Teil 4: Laserblitzverfahren (ISO 22007-4:2008) This European Standard was approved by CEN on 24 December 2011.
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 obtained 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 CEN-CENELEC Management Centre has the same status as the official versions.
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Reference numberISO 22007-4:2008(E)© ISO 2008
INTERNATIONAL STANDARD ISO22007-4First edition2008-12-15Plastics — Determination of thermal conductivity and thermal diffusivity — Part 4: Laser flash method Plastiques — Détermination de la conductivité thermique et de la diffusivité thermique — Partie 4: Méthode flash laser
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ISO 22007-4:2008(E) © ISO 2008 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 Principle.2 5 Apparatus.2 5.1 General.2 5.2 Furnace or climatic chamber.2 5.3 Flash source.4 5.4 Transient detectors.4 5.5 Thickness measurement device.5 6 Test specimen.5 6.1 Shape and dimension of the specimen.5 6.2 Preparation and conditioning of test specimen.5 6.3 Coating the specimen.5 7 Calibration and verification.6 7.1 Calibration of apparatus.6 7.2 Verification of apparatus.6 8 Procedure.6 9 Data analysis.7 10 Uncertainty.9 11 Test report.9 Annex A (informative)
Correction for finite pulse duration.10 Annex B (informative)
Alternative methods of calculating thermal diffusivity.11 Bibliography.12
ISO 22007-4:2008(E) iv © ISO 2008 – 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 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 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 Directives, 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 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 22007-4 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-chemical properties. ISO 22007 consists of the following parts, under the general title Plastics — Determination of thermal conductivity and thermal diffusivity: ⎯ Part 1: General principles ⎯ Part 2: Transient plane heat source (hot disc) method ⎯ Part 3: Temperature wave analysis method ⎯ Part 4: Laser flash method
INTERNATIONAL STANDARD ISO 22007-4:2008(E) © ISO 2008 – All rights reserved 1Plastics — Determination of thermal conductivity and thermal diffusivity — Part 4: Laser flash method 1 Scope 1.1 This part of ISO 22007 specifies a method for the determination of the thermal diffusivity of a thin solid disc of plastics in the thickness direction by the laser flash method. This method is based upon the measurement of the temperature rise at the rear face of the thin-disc specimen produced by a short energy pulse on the front face. 1.2 The method can be used for homogeneous solid plastics as well as composites having an isotropic or orthotropic structure. In general, it covers materials having a thermal diffusivity, α, in the range 1 × 10−7 m2⋅s−1 < α < 1 × 10−4 m2⋅s−1. Measurements can be carried out in gaseous and vacuum environments over a temperature range from − 100 °C to + 400 °C. NOTE For inhomogeneous specimens, the measured values may be specimen thickness dependent. 2 Normative references The following 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 291, Plastics — Standard atmospheres for conditioning and testing ISO 22007-1, Plastics — Determination of thermal conductivity and thermal diffusivity — Part 1: General principles ISO/IEC Guide 98-3, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) 3 Terms and definitions For the purpose of this document, the terms and definitions given in ISO 22007-1 and the following apply. 3.1 pulse width tp time duration for which the laser pulse intensity is larger than half of its maximum value NOTE It is expressed in seconds (s). SIST EN ISO 22007-4:2012

ISO 22007-4:2008(E) 2 © ISO 2008 – All rights reserved 3.2 time origin t0 start of the laser pulse NOTE It is expressed in seconds (s). 3.3 maximum temperature rise ∆Tmax difference between the maximum temperature reached by the rear face of the specimen after the laser pulse has passed and its steady temperature before the pulse NOTE It is expressed in kelvins (K). 3.4 half-rise time t1/2 time from the time origin until the rear-face temperature increases by one-half of ∆Tmax NOTE It is expressed in seconds (s). 3.5 thermogram temperature versus time curve for the rear face of the specimen 3.6 thickness d dimension of the test specimen in the direction of heat transfer measurement NOTE It is expressed in metres (m). 4 Principle One side of a flat-sheet test specimen is subjected to an energy pulse which has a very short duration compared with the half-rise time (see 6.1) and a uniform spatial energy distribution. The transient temperature rise on the opposite face (rear face) is recorded as a function of time (see Figure 1). The thermal diffusivity is obtained by comparing the experimental thermogram with a theoretical model (see Clause 9 and Annex B). 5 Apparatus 5.1 General The apparatus shall
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