ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
The homopolymer of chloral and a copolymer of chloral and p-chlorophenyl isocyanate were studied by magic-angle 13C NMR spectroscopy. 13C NMR Measurements with magic-angle spinning and cross polarization show for the acetal carbon a chemical shift of 101, 4 p.p.m. downfield from tetramethylsilane. The observation of a symmetrical, reasonably sharp (3 p.p.m.) resonance suggests that the polychloral is stereoregular. Spectra of chloral copolymers with 5 moles percent p-chlorophenyl is steroregular. Spectrical of chloral copolymers with 5 moles percent p-chlorophenyl isocynate have additional peaks between 130 and 150 p.p.m. from the aromatic carbons of the p-chlorophenyl isocyanate moiety.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1983.021840613
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