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Raman spectroscopic study of the effect of take‐up speed on conformation, orientation, and crystallinity in PET fibers
Author(s) -
Bulkin Bernard J.,
Deblase Frank J.,
Lewin Menachem
Publication year - 1990
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1990.220010203
Subject(s) - crystallinity , raman spectroscopy , materials science , spinning , orientation (vector space) , annealing (glass) , thermal , nuclear magnetic resonance , molecular physics , composite material , optics , thermodynamics , geometry , chemistry , physics , mathematics
The dependence of the Raman spectrum of PET fibers on take‐up speed (TUS) during high‐speed spinning is examined. It is found that conformational change, orientation, and crystallinity, all different functions of TUS as a processing variable, are reflected in the spectra. The data, as well as those from thermal annealing of PET fibers, are shown to be consistent with those from other techniques, leading to a set of equations from which a number of properties of the PET fibers can be determined from the Raman spectrum alone.