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Crystalline transitions and the solid‐state extrusion of polymers
Author(s) -
Aharoni S. M.,
Sibilia J. P.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070230112
Subject(s) - extrusion , polymer , lamellar structure , materials science , crystallinity , solid state , crystallography , thickening , polymer science , polymer chemistry , chemical engineering , composite material , chemistry , engineering
Extrusion experiments on eight polymers in our laboratory and eight additional polymers in other laboratories reveal that solid‐state extrusion and malleability occur in semicrystalline polymers that have a reversible crystalline transition, T c , and do not occur in crystalline polymers devoid of T c , The solid‐state extrusion takes place only in the temperature range of T c ≪ T < T m . The transparency of the solid‐state extrudates was shown to be largely due to void disappearance and may be due in part to the diminution in size of the scattering species. Increases in T m were shown not to be correlatable with lamellar thickening or chain extension.