Metathesis polymerization of substituted norbornenes: microstructure of the polymers of some ester derivatives

✍ Scribed by H.T. Ho; K.J. Ivin; B.S.R. Reddy; J.J. Rooney

• Book ID: 103075546
• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 452 KB
• Volume: 25
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(89)90048-7

✦ Synopsis

Ring-opened polymers have been prepared from 5-and 6-substituted norbornenes la-9a in which at least one substituent was an ester group. A variety of metathesis catalysts was used and the microstructures of the polymers were examined by 13C NMR spectroscopy. Assignments were made to c/t, HH/HT, TT/TH and m/r isomers. Polymers with a wide range of cis content were obtained and the results ran broadly parallel with those previously found for polymers of methyl-substituted norbornenes.

Very little HT bias was observed, m/r Splitting was found for certain carbon nuclei in HH structures derived from monomers containing an endo 5-substituent.