Polymers from multifunctional isocyanates, 12. Alternating copolymers from isocyanatoalkenes and electron deficient 1,2-disubstituted alkenes

✍ Scribed by Werner Mormann; Kerstin Schmalz; Axel Grimm

• Book ID: 102483672
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 473 KB
• Volume: 198
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1997.021980216

✦ Synopsis

Abstract

The free radical copolymerization of the electron rich monomers vinyl isocyanate, isopropenyl isocyanate, trans‐1‐propenyl isocyanate, and trans‐β‐styryl isocyanate with maleic anhydride has been investigated. The copolymerization behaviour of different electron deficient monomers like maleic anhydride, citraconic anhydride, N‐phenylmaleimide and fumaronitrile with isopropenyl isocyanate or vinyl isocyanate has also been studied. Polymerization in benzene is accompanied by precipitation of polymer, while the polymerization proceeds in solution in 2‐butanone. Alternating copolymers were obtained in all cases. The alternating behaviour is favoured by the very low tendency of all monomers except maleimides to undergo homopolymerization. From the reaction with maleic anhydride the reactivity of electron donating monomers was found to be vinyl isocyanate ≈ isopropenyl isocyanate ≫ β‐styryl isocyanate ≈ ≫ 1‐propenyl isocyanate, while the reactivity of electron accepting monomers with isopropenyl isocyanate was: maleic anydride > N‐phenylmaleimide > fumaronitrile.