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A method of rapid determination of thermal expansion and apparent second‐order transition temperature of polymer films
Author(s) -
Rothstein Edwin C.,
Spechler Daniel
Publication year - 1966
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760060204
Subject(s) - materials science , thermal expansion , composite material , polymer , polyester , elongation , ultimate tensile strength , thermal , glass transition , transition temperature , thermomechanical analysis , thermodynamics , condensed matter physics , physics , superconductivity
An Instron tensile tester has been modified to measure the thermal expansion of polymer films. The method greatly simplifies the experimental procedure necessary for the standard ASTM dilatometric thermal expansion measurement, particularly for thin films. Thermal expansion measurements were made for films of polyester, polycarbonates, vinyls, cellulosies, and polyolefins from room temperature up to 300°F. Second‐order transition temperatures were determined by plotting thermal elongation vs temperature; the transition temperature is indicated by a change in slope. Both expansion coeffcients and transition temperatures as determined by this method give excellent agreement with values reported in the literature.