prEN ISO 3146

Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods (ISO/DIS 3146:2021)

Kunststoffe - Bestimmung des Schmelzverhaltens (Schmelztemperatur oder Schmelzbereich) von teilkristallinen Polymeren im Kapillarrohr- und Polarisationsmikroskop-Verfahren (ISO/DIS 3146:2021)

Dieses Dokument legt zwei Verfahren zur Ermittlung des Schmelzverhaltens von teilkristallinen Polymeren fest.
Die nach den verschiedenen Verfahren bestimmten Schmelztemperaturen weichen aus den in der Einleitung erläuterten Gründen gewöhnlich um einige Kelvin ab.

Plastiques - Détermination du comportement à la fusion (température de fusion ou plage de températures de fusion) des polymères semi-cristallins par méthodes du tube capillaire et du microscope polarisant (ISO/DIS 3146:2021)

Polimerni materiali - Ugotavljanje temperature ali območja taljenja kristaliničnih polimerov s kapilarno cevko in polarizacijskim mikroskopom (ISO/DIS 3146:2021)

General Information

• Status: Not Published
• ICS: 83.080.01 - Plastics in general
• Technical Committee: CEN/TC 249 - Plastics
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 22-Oct-2021
• Completion Date: 22-Oct-2021
• Ref Project: oSIST prEN ISO 3146:2021 - Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods (ISO/DIS 3146:2021)

RELATIONS

• Revised: EN ISO 3146:2000 - Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods (ISO 3146:2000)
• Effective Date: 07-Oct-2020
• Revised: EN ISO 3146:2000/AC:2003 - Plastics - Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods (ISO 3146:2000)
• Effective Date: 07-Oct-2020

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 3146:2021
01-marec-2021

Polimerni materiali - Ugotavljanje temperature ali območja taljenja kristaliničnih

polimerov s kapilarno cevko in polarizacijskim mikroskopom (ISO/DIS 3146:2021)

Plastics - Determination of melting behaviour (melting temperature or melting range) of

semi-crystalline polymers by capillary tube and polarizing-microscope methods (ISO/DIS

3146:2021)
Kunststoffe - Bestimmung des Schmelzverhaltens (Schmelztemperatur oder
Schmelzbereich) von teilkristallinen Polymeren im Kapillarrohr- und
Polarisationsmikroskop-Verfahren (ISO/DIS 3146:2021)

Plastiques - Détermination du comportement à la fusion (température de fusion ou plage

de températures de fusion) des polymères semi-cristallins par méthodes du tube
capillaire et du microscope polarisant (ISO/DIS 3146:2021)
Ta slovenski standard je istoveten z: prEN ISO 3146
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
oSIST prEN ISO 3146:2021 en,fr,de

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

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oSIST prEN ISO 3146:2021
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oSIST prEN ISO 3146:2021
DRAFT INTERNATIONAL STANDARD
ISO/DIS 3146
ISO/TC 61/SC 5 Secretariat: DIN
Voting begins on: Voting terminates on:
2021-01-21 2021-04-15
Plastics — Determination of melting behaviour (melting
temperature or melting range) of semi-crystalline polymers
by capillary tube and polarizing-microscope methods

Plastiques — Détermination du comportement à la fusion (température de fusion ou plage de

températures de fusion) des polymères semi-cristallins par méthodes du tube capillaire et du microscope

polarisant
ICS: 83.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 3146:2021(E)
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 SUPPORTING DOCUMENTATION. ISO 2021
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oSIST prEN ISO 3146:2021
ISO/DIS 3146:2021(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

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Published in Switzerland
ii © ISO 2021 – All rights reserved
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oSIST prEN ISO 3146:2021
ISO/DIS 3146:2021(E)
Contents Page

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

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

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

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

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

4 Method A — Capillary tube ........................................................................................................................................................................ 2

4.1 Principle ........................................................................................................................................................................................................ 2

4.2 Apparatus (see Figure 1) ................................................................................................................................................................ 2

4.3 Test samples .............................................................................................................................................................................................. 2

4.3.1 General...................................................................................................................................................................................... 2

4.3.2 Characteristics ................................................................................................................................................................... 3

4.3.3 Conditioning ........................................................................................................................................................................ 3

4.4 Procedure .................................................................................................................................................................................................... 4

4.4.1 Calibration ............................................................................................................................................................................. 4

4.4.2 Determination .................................................................................................................................................................... 5

4.5 Test report ................................................................................................................................................................................................... 5

5 Method B — Polarizing microscope.................................................................................................................................................. 6

5.1 Principle ........................................................................................................................................................................................................ 6

5.2 Apparatus .................................................................................................................................................................................................... 6

5.3 Test samples .............................................................................................................................................................................................. 6

5.3.1 Powdered materials ...................................................................................................................................................... 6

5.3.2 Moulded or pelleted materials ............................................................................................................................. 6

5.3.3 Film or sheet materials ........................................................................................................................................... .... 7

5.3.4 Conditioning ........................................................................................................................................................................ 7

5.4 Procedure .................................................................................................................................................................................................... 7

5.4.1 Calibration ............................................................................................................................................................................. 7

5.4.2 Determination .................................................................................................................................................................... 7

5.5 Precision ....................................................................................................................................................................................................... 7

5.6 Test report ................................................................................................................................................................................................... 8

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2021 – All rights reserved iii
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oSIST prEN ISO 3146:2021
ISO/DIS 3146:2021(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 International Standard 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).

This fourth edition cancels and replaces the third edition (ISO 3146:2000), which has been technically

revised.
The main changes compared to the previous edition are as follows:

a) the specifications of the apparatus and measurement procedure have been revised;

b) the technical corrigendum 1 dated 2002 has been incorporated;

c) the table of calibration standards has been revised by adding further entries, synonyms and CAS

numbers of organic chemicals, correcting errors and modifying melting temperatures according to

added references.

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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oSIST prEN ISO 3146:2021
ISO/DIS 3146:2021(E)
Introduction

The melting behaviour of a crystalline or semi-crystalline polymer is a structure-sensitive property.

In polymers, a sharp melting point, such as is observed for low molecular mass substances, usually does

not occur; instead a melting temperature range is observed on heating, from the first change of shape of

the solid particles to the transformation into a highly viscous or viscoelastic liquid, with accompanying

disappearance of the crystalline phase. The melting range depends upon a number of parameters, such

as molecular mass, molecular mass distribution, per cent crystallinity, and thermodynamic properties.

The melting range can also depend on experimental parameters such as previous thermal history of

the specimen, heating or cooling rate, etc. The lower or upper limit of the melting range, or its average

value, is sometimes conventionally referred to as the “melting temperature”.
© ISO 2021 – All rights reserved v
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oSIST prEN ISO 3146:2021
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oSIST prEN ISO 3146:2021
DRAFT INTERNATIONAL STANDARD ISO/DIS 3146:2021(E)
Plastics — Determination of melting behaviour (melting
temperature or melting range) of semi-crystalline polymers
by capillary tube and polarizing-microscope methods
1 Scope

This document specifies two methods for evaluating the melting behaviour of semi-crystalline

polymers.

Melting temperatures determined by the different methods usually differ by several kelvins for the

reasons explained in the introduction.
Method A: Capillary tube

This method is based on the changes in shape of the polymer. It is applicable to all semi-crystalline

polymers and their compounds.

NOTE 1 Method A can also be useful for the evaluation of the softening of non-crystalline solids.

Method B: Polarizing microscope

This method is based on changes in the optical properties of the polymer. It is applicable to polymers

containing a birefringent crystalline phase. It may not be suitable for plastics compounds containing

pigments and/or other additives which could interfere with the birefringence of the polymeric

crystalline zone.

NOTE 2 Another method applicable to semi-crystalline polymers is described in ISO 11357-3, Plastics —

Differential scanning calorimetry (DSC) — Part 3: Determination of temperature and enthalpy of melting and

cryst
...