Reports

Massive Internal Fracture of an Amorphous Polyester

Science  10 Oct 1969:
Vol. 166, Issue 3902, pp. 227-228
DOI: 10.1126/science.166.3902.227

Abstract

When amorphious polyethylene terephthalate is subjected to a tensile load of 2 to 4 x 108 dynes per square centimeter wthin the approximate temperature range 40°to 70°C, an unusual optical effect occurs. The transparent polymer film is suddenly transformed into a brilliantly reflecting strip with the luster of silver. Extensive formation of voids accounts for the unorthodox behavior.

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