prEN ISO 11357-5

SLOVENSKI STANDARD
01-junij-2024
Polimerni materiali - Diferenčna dinamična kalorimetrija (DSC) - 5. del:
Ugotavljanje karakterističnih reakcijskih temperatur in časov, entalpije reakcije in
stopnje pretvorbe (ISO/DIS 11357-5:2024)
Plastics - Differential scanning calorimetry (DSC) - Part 5: Determination of characteristic
reaction-curve temperatures and times, enthalpy of reaction and degree of conversion
(ISO/DIS 11357-5:2024)
Kunststoffe - Dynamische Differenzkalorimetrie (DSC) - Teil 5: Bestimmung von
charakteristischen Reaktionstemperaturen und ‑zeiten, Reaktionsenthalpie und Umsatz
(ISO/DIS 11357-5:2024)
Plastiques - Analyse calorimétrique différentielle (DSC) - Partie 5: Détermination des
températures et temps caractéristiques de la courbe de réaction, de l'enthalpie de
réaction et du degré de transformation (ISO/DIS 11357-5:2024)
Ta slovenski standard je istoveten z: prEN ISO 11357-5
ICS:
17.200.10 Toplota. Kalorimetrija Heat. Calorimetry
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 11357-5
ISO/TC 61/SC 5
Plastics — Differential scanning
Secretariat: DIN
calorimetry (DSC) —
Voting begins on:
Part 5: 2024-04-09
Determination of characteristic
Voting terminates on:
2024-07-02
reaction-curve temperatures and
times, enthalpy of reaction and
degree of conversion
Plastiques — Analyse calorimétrique différentielle (DSC) —
Partie 5: Détermination des températures et temps
caractéristiques de la courbe de réaction, de l'enthalpie de
réaction et du degré de transformation
ICS: 83.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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RECIPIENTS OF THIS DRAFT ARE INVITED
IMPORTANT — Please use this updated version dated 2024-04-04, and
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discard any previous version of this DIS.
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Reference number
ISO/DIS 11357-5:2024(en)
ISO/DIS 11357-5:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii
ISO/DIS 11357-5:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus and materials . 2
6 Test specimens . 2
7 Test conditions and specimen conditioning . 2
8 Calibration . 2
9 Procedure . 2
9.1 General .2
9.2 Temperature-scanning method .2
9.3 Isothermal method .3
9.3.1 General .3
9.3.2 Constant-temperature method .3
9.3.3 Procedure starting at ambient temperature .3
9.3.4 Residual enthalpy .4
10 Determination of results . 4
10.1 Determination of characteristic temperatures and enthalpy of reaction (temperature-
scanning method) .4
10.2 Determination of characteristic times and enthalpy of reaction (isothermal method) .5
10.3 Determination of degree of conversion .6
10.3.1 General .6
10.3.2 Calculation of α from a temperature scan .6
10.3.3 Calculation of α from an isothermal curve .8
11 Precision . 9
12 Test report . 9
Bibliography .10

iii
ISO/DIS 11357-5:2024(en)
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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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.
This third edition cancels and replaces the second edition (ISO 11357-5:2013), which has been technically
revised. Significant technical changes are the following:
— the scope has been limited to conventional DSC;
— in case of reactions overlapping with decomposition the user is referred to fast DSC.
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
DRAFT International Standard ISO/DIS 11357-5:2024(en)
Plastics — Differential scanning calorimetry (DSC) —
Part 5:
Determination of characteristic reaction-curve temperatures
and times, enthalpy of reaction and degree of conversion
WARNING — Caution should be observed when working with materials which could give a runaway
reaction or exhibit other dangerous behaviour.
1 Scope
This document specifies a method for the determination of reaction temperatures and times, enthalpies of
reaction, and degrees of conversion using conventional differential scanning calorimetry (DSC) as specified
in ISO 11357-1.
The method applies to monomers, prepolymers, and polymers in the solid or liquid state. The material can
contain fillers and/or initiators in the solid or liquid state.
This document is not applicable to fast DSC as specified in ISO 23976.
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 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 11357-1 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
polymerization
process of converting a monomer or a mixture of monomers into a polymer
3.2
crosslinking
process of multiple intermolecular covalent or ionic bonding between polymer chains
3.3
degree of conversion
quantity of reacted product obtained during a reaction compared with the maximum possible quantity of
the product
Note 1 to entry: The degree of conversion will depend on both time and temperature.

ISO/DIS 11357-5:2024(en)
4 Principle
The principle is specified in ISO 11357-1.
The test method described indicates the various stages of the reaction by means of DSC curves.
5 Apparatus and materials
The apparatus and materials are spec
...