ISO 19935-2:2020
(Main)Plastics — Temperature modulated DSC — Part 2: Measurement of specific heat capacity cp
Plastics — Temperature modulated DSC — Part 2: Measurement of specific heat capacity cp
This document establishes a method for measurement of specific heat capacity, cp, using temperature modulated differential scanning calorimetry.
Plastiques — DSC à température modulée — Partie 2: Mesurage précis de la chaleur spécifique cp
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 19935-2
First edition
2020-09
Plastics — Temperature modulated
DSC —
Part 2:
Measurement of specific heat
capacity c
p
Plastiques — DSC à température modulée —
Partie 2: Mesurage précis de la chaleur spécifique c
p
Reference number
ISO 19935-2:2020(E)
©
ISO 2020
---------------------- Page: 1 ----------------------
ISO 19935-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 19935-2:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 1
4.1 Temperature modulation, T(t) . 1
4.2 Scanning rate . 1
4.3 Heat flow rate, Φ(t) . 1
5 Principles of determination of specific heat capacity with temperature modulated DSC .2
5.1 General . 2
5.2 Specific heat capacity with no processes . 2
5.3 Reversing and non-reversing specific heat capacity . 2
5.4 Step scan method . 2
5.5 Multiple frequencies . 2
6 Apparatus and materials. 2
6.1 General . 2
6.2 Temperature control of the modulated differential scanning calorimeter . 2
7 Calibration . 3
7.1 General . 3
7.2 Calibration of modulation amplitude . 3
7.3 Calibration of phase . 3
8 Procedure. 3
8.1 General . 3
8.2 Calculation of the specific heat capacity . 4
8.3 Examples of the results . 4
8.3.1 Modulated heat flow rate and scanning rate of modulation . 4
8.3.2 Determination of specific heat capacity . 5
9 Precision and bias . 6
10 Test report . 7
Annex A (informative) Example of the c values of polystyrene (PS). 8
p
Annex B (informative) Example of the calibration constant K(ω) determined with the
[3]
literature values of α-Al O .10
2 3
Annex C (informative) Example of a reversing heat flow rate curve based on a modulated
heat flow rate curve and a comparison with the specific heat capacity.11
Annex D (informative) Example of determination of specific heat capacity based on a
multifrequency modulated heat flow rate curve .12
Bibliography .14
© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO 19935-2:2020(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.
A list of all parts in the ISO 19935 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 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 19935-2:2020(E)
Introduction
This document describes the realization of standardized thermoanalytical test methods which can be
used for the determination of specific heat capacity data needed for data sheets or databases as well as
for research purposes. It can also be applied to quality assurance or to routine checks of raw materials
and finished products, if desired. The procedures mentioned in this document apply as long as special
product standards or standards describing special atmospheres for conditioning of samples do not
require alternate regulations.
For scientific investigations or resolution of special analytical problems, all technical capabilities of the
instruments beyond the regulations of this document may be used.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 19935-2:2020(E)
Plastics — Temperature modulated DSC —
Part 2:
Measurement of specific heat capacity c
p
1 Scope
This document establishes a method for measurement of specific heat capacity, c , using temperature
p
modulated differential scanning calorimetry.
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 472, Plastics — Vocabulary
ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles
ISO 19935-1, Plastics — Temperature modulated DSC — Part 1: General principles
ISO 80000-5, Quantities and units — Part 5: Thermodynamics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472, ISO 11357-1, ISO 19935-1
and ISO 80000-5 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 Symbols and abbreviated terms
4.1 Temperature modulation, T(t)
According to ISO 19935-1.
4.2 Scanning rate
According to ISO 19935-1.
4.3 Heat flow rate, Φ(t)
According to ISO 19935-1.
© ISO 2020 – All rights reserved 1
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ISO 19935-2:2020(E)
5 Principles of determination of specific heat capacity with temperature
modulated DSC
5.1 General
The use of temperature modulated DSC is advantageous for the measurement of specific heat capacity
not only outside the region of a transition, because it does not require a stable baseline to achieve high
accuracy. The measurement of specific heat capacity is only based on the amplitude of the modulated
heat flow rate signal.
5.2 Specific heat capacity with no processes
According to ISO 19935-1.
5.3 Reversing and non-reversing specific heat capacity
According to
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 19935-2
ISO/TC 61/SC 5
Plastics — Temperature modulated
Secretariat: DIN
DSC —
Voting begins on:
2020-04-16
Part 2:
Voting terminates on:
Measurement of accurate specific
2020-06-11
heat c
p
Plastiques — DSC à température modulée —
Partie 2: Mesurage précis de la chaleur spécifique c
p
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 19935-2:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
©
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 19935-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 19935-2:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 1
4.1 Temperature modulation, T(t) . 1
4.2 Scanning rate . 1
4.3 Heat flow rate, Φ(t) . 1
5 Principles of determination of specific heat capacity with temperature modulated DSC .2
5.1 General . 2
5.2 Specific heat capacity with no processes . 2
5.3 Reversing and non-reversing specific heat capacity . 2
5.4 Step scan method . 2
5.5 Multiple frequencies . 2
6 Apparatus and materials. 2
6.1 General . 2
6.2 Temperature control of modulated differential scanning calorimeter . 2
7 Calibration . 3
7.1 General . 3
7.2 Calibration of modulation amplitude . 3
7.3 Calibration of phase . 3
8 Procedure. 3
8.1 General . 3
8.2 Calculation of the specific heat capacity . 3
8.3 Examples of the results . 4
8.3.1 Modulated heat flow rate and scanning rate of modulation . 4
8.3.2 Determination of specific heat capacity . 5
9 Precision and bias . 6
10 Test report . 6
Annex A (informative) Example of the c values of polystyrene (PS). 8
p
Annex B (informative) Example of the calibration constant K(ω) determined with the
[3]
literature values of α-Al O . 9
2 3
Annex C (informative) Example of a reversing heat flow rate curve based on a modulated
heat flow rate curve and a comparison with the specific heat capacity .10
Annex D (informative) Example of determination of specific heat capacity based on a
multifrequency modulated heat flow rate curve .11
Bibliography .13
© ISO 2020 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 19935-2:2020(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.
A list of all parts in the ISO 19935 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 2020 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 19935-2:2020(E)
Introduction
This document describes the realization of standardized thermoanalytical test methods which can be
used for the determination of specific heat capacity data needed for data sheets or databases as well as
for research purposes. It can also be applied to quality assurance or to routine checks of raw materials
and finished products, if desired. The procedures mentioned in this document apply as long as special
product standards or standards describing special atmospheres for conditioning of samples do not
require alternate regulations.
For scientific investigations or resolution of special analytical problems, all technical capabilities of the
instruments beyond the regulations of this document may be used.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 19935-2:2020(E)
Plastics — Temperature modulated DSC —
Part 2:
Measurement of accurate specific heat c
p
1 Scope
This document establishes a method for measurement of specific heat capacity, c , using temperature
p
modulated differential scanning calorimetry.
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 472, Plastics — Vocabulary
ISO 11357-1, Plastics — Differential scanning calorimetry (DSC) — Part 1: General principles
ISO 19935-1, Plastics — Temperature modulated DSC — Part 1: General principles
ISO 80000-5, Quantities and units — Part 5: Thermodynamics
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472, ISO 11357-1, ISO 19935-1
and ISO 80000-5 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/o bp
— IEC Electropedia: available at http:// www.e lectropedia. org/
4 Symbols and abbreviated terms
4.1 Temperature modulation, T(t)
According to ISO 19935-1.
4.2 Scanning rate
According to ISO 19935-1.
4.3 Heat flow rate, Φ(t)
According to ISO 19935-1.
© ISO 2020 – All rights reserved 1
---------------------- Page: 6 ----------------------
ISO/FDIS 19935-2:2020(E)
5 Principles of determination of specific heat capacity with temperature
modulated DSC
5.1 General
The use of temperature modulated DSC is advantage
...
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