International Standard
ISO 3146:2022
Plastics — Determination of melting behaviour (melting temperature or melting range) of semi-crystalline polymers by capillary tube and polarizing-microscope methods
Reference number
ISO 3146:2022
Edition 4
International Standard
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ISO 3146:2022
Published (Edition 4, 2022)

ISO 3146:2022

ISO 3146:2022
CHF 63
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This document specifies two methods for evaluating the melting behaviour of semi-crystalline polymers.

a) 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.

b) 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 might not be suitable for plastics compounds containing pigments and/or other additives which can interfere with the birefringence of the polymeric crystalline zone.

NOTE 2   Another method applicable to semi-crystalline polymers is described in ISO 11357‑3.

General information

  •  : Published
     : 2022-03
    : International Standard published [60.60]
  •  : 4
     : 9
  • ISO/TC 61/SC 5
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