Plastics - Differential scanning calorimetry (DSC) - Part 8: Determination of thermal conductivity (ISO 11357-8:2021)

See title

Kunststoffe - Dynamische Differenz-Thermoanalyse (DSC) - Teil 8: Bestimmung der Wärmeleitfähigkeit (ISO 11357-8:2021)

Dieses Dokument legt ein Verfahren zur Bestimmung der Wärmeleitfähigkeit von festen ungefüllten und gefüllten oder faserverstärkten Kunststoffen und Verbundstoffen durch die Dynamische Differenz-Thermoanalyse (DSC) fest.
Es ist anwendbar für Werkstoffe mit Wärmeleitfähigkeiten bis zu 1 W/(m ⋅ K).

Plastiques - Analyse calorimétrique différentielle (DSC) - Partie 8: Détermination de la conductivité thermique (ISO 11357-8:2021)

Polimerni materiali - Diferenčna dinamična kalorimetrija (DSC) - 8. del: Ugotavljanje toplotne prevodnosti (ISO 11357-8:2021)

General Information

Status
Published
Public Enquiry End Date
23-Mar-2020
Publication Date
24-Mar-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Mar-2021
Due Date
16-May-2021
Completion Date
25-Mar-2021

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SLOVENSKI STANDARD
SIST EN ISO 11357-8:2021
01-maj-2021
Polimerni materiali - Diferenčna dinamična kalorimetrija (DSC) - 8. del:
Ugotavljanje toplotne prevodnosti (ISO 11357-8:2021)

Plastics - Differential scanning calorimetry (DSC) - Part 8: Determination of thermal

conductivity (ISO 11357-8:2021)
Kunststoffe - Dynamische Differenz-Thermoanalyse (DSC) - Teil 8: Bestimmung der
Wärmeleitfähigkeit (ISO 11357-8:2021)

Plastiques - Analyse calorimétrique différentielle (DSC) - Partie 8: Détermination de la

conductivité thermique (ISO 11357-8:2021)
Ta slovenski standard je istoveten z: EN ISO 11357-8:2021
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 11357-8:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 11357-8:2021
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SIST EN ISO 11357-8:2021
EN ISO 11357-8
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2021
EUROPÄISCHE NORM
ICS 83.080.01
English Version
Plastics - Differential scanning calorimetry (DSC) - Part 8:
Determination of thermal conductivity (ISO 11357-
8:2021)

Plastiques - Analyse calorimétrique différentielle (DSC) Kunststoffe - Dynamische Differenz-Thermoanalyse

- Partie 8: Détermination de la conductivité thermique (DSC) - Teil 8: Bestimmung der Wärmeleitfähigkeit

(ISO 11357-8:2021) (ISO 11357-8:2021)
This European Standard was approved by CEN on 25 January 2021.

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.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11357-8:2021 E

worldwide for CEN national Members.
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SIST EN ISO 11357-8:2021
EN ISO 11357-8:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 11357-8:2021
EN ISO 11357-8:2021 (E)
European foreword

This document (EN ISO 11357-8:2021) has been prepared by Technical Committee ISO/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 September 2021, and conflicting national standards

shall be withdrawn at the latest by September 2021.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

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, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 11357-8:2021 has been approved by CEN as EN ISO 11357-8:2021 without any

modification.
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SIST EN ISO 11357-8:2021
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SIST EN ISO 11357-8:2021
INTERNATIONAL ISO
STANDARD 11357-8
First edition
2021-02
Plastics — Differential scanning
calorimetry (DSC) —
Part 8:
Determination of thermal conductivity
Plastiques — Analyse calorimétrique différentielle (DSC) —
Partie 8: Détermination de la conductivité thermique
Reference number
ISO 11357-8:2021(E)
ISO 2021
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SIST EN ISO 11357-8:2021
ISO 11357-8:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
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SIST EN ISO 11357-8:2021
ISO 11357-8:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Apparatus and substances.......................................................................................................................................................................... 2

5.1 DSC instrument ....................................................................................................................................................................................... 2

5.2 Crucibles ....................................................................................................................................................................................................... 2

5.3 Melting substance ................................................................................................................................................................................. 2

5.4 Protective lacquer................................................................................................................................................................................. 3

5.5 Length measuring device ............................................................................................................................................................... 3

6 Specimens .................................................................................................................................................................................................................... 3

6.1 Geometry ...................................................................................................................................................................................................... 3

6.2 Number and sampling ...................................................................................................................................................................... 3

7 Conditioning .............................................................................................................................................................................................................. 3

8 Calibration .................................................................................................................................................................................................................. 4

9 Measurement procedure .............................................................................................................................................................................. 4

9.1 Preparation of crucibles .................................................................................................................................................................. 4

9.2 Use of thermal contact substances ........................................................................................................................................ 4

9.3 Measurement of melting substance ...................................................................................................................................... 4

9.3.1 Placing of crucibles in sample holder ............................................................................................................ 4

9.3.2 Distribution of melting substance on crucible ground ................................................................... 4

9.3.3 Measurement of the slope of the melting curve without test specimen .......................... 5

9.3.4 Insertion of test specimen ....................................................................................................................................... 5

9.3.5 Measurement of the slope of the melting curve with test specimen .................................. 5

9.4 Evaluation of the slope of the peaks of the melting substance ...................................................................... 5

10 Calculation of thermal conductivity ................................................................................................................................................. 7

11 Service life of crucibles upon using gallium as melting substance ..................................................................7

12 Precision and bias ............................................................................................................................................................................................... 7

13 Test report ................................................................................................................................................................................................................... 8

Annex A (informative) Interlaboratory determination of thermal conductivity measured by

means of DSC ............................................................................................................................................................................................................ 9

Bibliography .............................................................................................................................................................................................................................15

© ISO 2021 – All rights reserved iii
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SIST EN ISO 11357-8:2021
ISO 11357-8:2021(E)
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.

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, the 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 (see www .iso .org/ directives).

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. 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 (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-

chemical properties, in collaboration with the European Committee for Standardization (CEN) Technical

Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation between

ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 11357 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
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SIST EN ISO 11357-8:2021
ISO 11357-8:2021(E)
Introduction

The advantage of using DSC for measuring the thermal conductivity of plastics is that with the same

instrument also the specific heat capacity can be obtained. This enables the determination of the

thermal diffusivity by dividing the thermal conductivity by the density and specific heat capacity.

In addition, DSC instruments are widely used and available in almost all test institutes and labs. Hence,

measurements of thermal conductivity can be done without need for procurement of an additional

instrument.
© ISO 2021 – All rights reserved v
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SIST EN ISO 11357-8:2021
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SIST EN ISO 11357-8:2021
INTERNATIONAL STANDARD ISO 11357-8:2021(E)
Plastics — Differential scanning calorimetry (DSC) —
Part 8:
Determination of thermal conductivity
1 Scope

This document establishes a method for determination of the thermal conductivity of solid unfilled and

filled or fibre reinforced plastics and composites by means of differential scanning calorimetry (DSC).

It is applicable for materials with thermal conductivities of up to 1 W/(m⋅K).
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 472, Plastics — Vocabulary

ISO 6344-1, Coated abrasives — Grain size analysis — Part 1: Grain size distribution test

ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 472 and ISO 11357-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Principle

For the determination of thermal conductivity, the usual placement of the specimen in the sample

holder position is modified according to a procedure proposed in References [1] and [2] Additional

details on scientific background, deduction of results and performance of measurements can be found

in References [3] and [4].

An empty crucible is placed in the reference position of the sample holder assembly. The test specimen

is placed directly onto the sensor of the sample position and a crucible containing a substance of known

melting temperature is put on top of the specimen (see Figure 1). The thermal conductivity is measured

at a temperature slightly above the melting point of this substance in the small temperature range in

which the slope of the melting peak with test specimen is determined (see 9.4, Figure 2).

Upon heating, a temperature gradient is created in the specimen. The temperature of the top of

the specimen remains constant at the melting temperature T of the melting substance while the

temperature of the bottom side of the specimen corresponds to the temperature of the sample side

© ISO 2021 – All rights reserved 1
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SIST EN ISO 11357-8:2021
ISO 11357-8:2021(E)

sensor. The differential heat flow between sample and reference sensor is measured by the DSC

instrument.

From the temperature difference between top and bottom of the sample (T - T ), the sample height h

m p

and the heat flow rate difference Q between sample and the reference sensor, the thermal conductivity

of the specimen is determined.
Key
h height of specimen
 heat flow rate difference between sample and reference position
S sensor of sample position
S sensor of reference position

T melting temperature of the known substance and the temperature of the top of the specimen

T temperature of the sample position and the bottom side of the specimen
T temperature of the reference position
Figure 1 — Schematic layout of measurement
5 Apparatus and substances
5.1 DSC instrument
A DSC instrument in accordance with specificati
...

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