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Infrared studies of cryogenic transitions in poly(ethylene terephthalate) and polystyrene

✍ Scribed by Y. S. Huang; J. L. Koenig

Publisher
John Wiley and Sons
Year
1971
Tongue
English
Weight
413 KB
Volume
15
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Infrared absorbance measurements as a function of temperature down to 13Β°K have been made on poly(ethylene terephthalate) and polystyrene. Transition temperatures are assigned to the temperatures where there are abrupt changes in the absorbance or integrated band intensities. Bands of known structural origin arising from either crystal‐line or amorphous phases are studied to probe the structure basis and environment effect for each transition. Transitions are found around 50, 120, 180, and 220Β°K for PET and around 50Β° and 235Β°K for polystyrene.

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