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13C-NMR study of radical copolymers of (−)-menthyl methacrylate with trans-4-methacryloyloxyazobenzene

✍ Scribed by R. Solaro; A. Altomare; F. Ciardelli

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
285 KB
Volume
26
Category
Article
ISSN
0014-3057

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✦ Synopsis

The 50.3 MHz ~3C-NMR of various free radical copolymers of (-)-menthyl methacrylate with trans-4-methacryloyloxyazobenzene was investigated in CDC13 solution at room temperature. The smooth variation of the chemical shifts of aromatic carbons with chemical composition points to a random distribution of the monomeric units along the polymer chain. Analysis of the carbonyl signal allows one to determine the main chain stereochemistry of copolymers in which one monomer predominates. Apart from the macromolecular nature, no appreciable effect on local mobility is observed arising from different neighbouring units and stereoregularity.

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