The effect of donor-acceptor complexes on the stereochemistry of alternating copolymers of alkyl vinyl ethers with maleonitrile and fumaronitrile

✍ Scribed by Butler, George B. ;Do, Choon H.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1989
• Weight: 990 KB
• Volume: 15
• Category: Article
• ISSN: 0025-116X
• DOI: 10.1002/macp.1989.020151989111

✦ Synopsis

This paper presents the results of a study of the alternating copolymerization of alkyl vinyl ethers, as electron-donors (D), with maleonitrile and fumaronitrile, respectively, as electronacceptors (A), and a '3C NMR evaluation of the stereochemistry of the copolymers. The results show that the two copolymers are stereochemically different. By use of model compounds as well as UV studies and quantum chemical (PVCIM) calculations, attempts to correlate the relationship of the complex (C) to copolymer structure have been made. We have previously reported studies on copolymerization of alkyl vinyl ethers and N-substituted maleimides. Stereochemical consequences resulting from variation of five parameters, each of which according to Mulliken theory should vary the concentration of C relative to that of the free monomers, in every case, were that the cis-rruns ratio of the succinimide unit of the copolymer chain varied in accord with theory, being higher at higher [C].