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  • BSI
    21/30427377 DC BS EN ISO 3146. Plastics. Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods
    Edition: 2021
    $44.66
    / user per year

Description of 21/30427377 DC 2021

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 crystallization.



Standard Number21/30427377 DC
TitleBS EN ISO 3146. Plastics. Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods
StatusDefinitive
Publication Date2021-01-21
Identical National Standard OfISO/DIS 3146
DescriptorsThermal testing, Heating tests, Plastics, Test specimens, Visual inspection (testing), Test equipment, Polarization (wave physics), Testing conditions, Plastics and rubber technology, Crystals, Polymers, Temperature measurement, Melting point
ICS83.080.01 Plastics in general
CommitteePRI/21
PublisherBSI
Pages17

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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