SPECTROSCOPIC STUDIES OF CHAIN EXTENSION IN LONG CHAIN MOLECULES AND POLYMERS
Creators:Rabolt, John F.
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Publisher:Ohio State University
Fourier Transform IR and Raman spectroscopy are non-destructive techniques which can provide specific structural information about conformational disorder in molecules. Changes in bandshapes and shifts in frequency provide a unique insight into the nature of molecular motion occurring prior to structural phase transitions. These techniques have recently been used to characterize the melting process in Langmuir-Blodgett monolayers of fatty acid molecules and submicron thin films of poly (di n-alkylsilanes). In addition, studies of short chain semifluorinated n-alkane oligomers indicate that only partial molecular disorder is introduced upon melting, suggesting that rigid rod-like segments continue to exist in the liquid state.
Author Institution: IBM San Jose Research Laboratory
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