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Fourier‐transform infrared study of uniaxially oriented polytetrafluoroethylene
Author(s) -
Yeung C. K.,
Jasse B.
Publication year - 1982
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.1982.070271206
Subject(s) - dichroic glass , amorphous solid , polytetrafluoroethylene , materials science , infrared , fourier transform infrared spectroscopy , orientation (vector space) , fourier transform , absorption (acoustics) , infrared spectroscopy , optics , composite material , crystallography , optoelectronics , chemistry , physics , organic chemistry , geometry , mathematics , quantum mechanics
Abstract Infrared measurements of the dichroic ratio of polytetrafluoroethylene absorption bands provide a valuable method of determination of the orientation of chains as well in crystalline regions as in amorphous ones. The 1452 cm −1 , 1545 cm −1 , and 2362 cm −1 combination bands are convenient for measuring crystalline orientation while the 703 cm −1 , 740 cm −1 , and 786 cm −1 bands lead to amorphous orientation. The 1795 cm −1 (crystalline), 720 cm −1 , and 774 cm −1 (amorphous) absorption bands are shown to be complex ones and thereby unusable for measuring orientation.