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Raman spectroscopic studies of chloroprene polymers
Author(s) -
Coleman M. M.,
Painter P. C.,
Koenig J. L.
Publication year - 1976
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250050411
Subject(s) - raman spectroscopy , amorphous solid , polymer , materials science , spectral line , polymer chemistry , analytical chemistry (journal) , chemistry , crystallography , organic chemistry , optics , composite material , physics , astronomy
The Raman spectra of predominantly trans ‐ 1,4‐polychloroprenes are presented. Spectra were recorded of polymers prepared by free radical emulsion techniques in the temperature range −20 to +40°C in both the solid state and in CS 2 solution. Spectral changes characteristic of the crystalline and amorphous regions of the polymers have been identified. Measurements of the relative broadness of the 1007 cm −1 Raman line, which is associated with the C‐C stretching frequency in the main chain, have been made and correlated with the amorphous content of the polymer. Extrapolations of these results indicates that polymers prepared in the range 50–60°C should be completely amorphous elastomeric materials.