Ring‐opening‐closing alternating copolymerization via zwitterion intermediates

Shiro Kobayashi, Stefan Lundmark, Jun‐Ichi ‐I Kadokawa, Hiroshi Uyama, Shin‐Ichiro ‐I Shoda

Research output: Contribution to journalArticlepeer-review


The present paper describes comprehensive results based on a new concept, i.e., ring‐opening‐closing alternating copolymerization. The copolymerization is given by combinations of ring‐opening of a cyclic monomer (A) and ring‐closing of a non‐cyclic monomer (B). The cyclic monomers used are five‐, six‐, and seven‐membered cyclic phosphonites and 2‐methyl‐2‐oxazoline. As a monomer (B), muconic acid, dialdehydes, di(meth)acrylic anhydrides, and N‐methyldiacrylamide are used. A 1:1 mixture of these monomers produced an alternating copolymer having a ring‐opened and a ring‐closed structural unit. A mechanism involving zwitterion intermediates is considered in all copolymerizations.

Original languageEnglish
Pages (from-to)137-146
Number of pages10
JournalMakromolekulare Chemie. Macromolecular Symposia
Issue number1
Publication statusPublished - 1993 Jul

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry


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