Radical cyclopolymerization of divinyl acetals—structure variation with polymerization conditions

Mitsuo Tsukino, Toyoki Kunitake

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Radical polymerizations of divinyl formal, acetaldehyde divinyl acetal, and acetone divinyl acetal were conducted under a series of conditions, and the microstructures of the cyclopolymers obtained were examined by 1H NMR and 13C NMR spectroscopies. The cyclopolymers contained cis-dioxolane units as the major structure along with other minor structures such as the pendant dioxolane unit and trans-dioxolane unit. The content of the major structure increased with lowering polymerization temperature and increasing monomer concentration. The uncyclized unit and the six-membered dioxane ring were not formed under any condition. The propagation steps included cyclization and isomerization in addition to monomer addition and are discussed on the basis of variation in polymer structure with polymerization conditions. The methyl substitution at the acetal carbon lowers isomerization of the cyclized radical.

Original languageEnglish
Pages (from-to)943-951
Number of pages9
JournalPolymer Journal
Volume17
Issue number8
DOIs
Publication statusPublished - Aug 1985

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Radical cyclopolymerization of divinyl acetals—structure variation with polymerization conditions'. Together they form a unique fingerprint.

  • Cite this