Polymerization in Clathrate Tunnel Systems: Stereocontrolled Polymerization of Unsaturated Monomers in Crystals of Tris(o-phenylenedioxy)cyclotriphosphazene

Harry R. Allcock, Wayne T. Ferrar, Michael L. Levin

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Acetylene, phenylacetylene, butadiene, isobutylene, divinylbenzene, styrene, and 4-bromostyrene have been trapped within the tunnel clathrate system of tris(o-phenylenedioxy)cyclotriphosphazene (I). For some of the adducts irradiation of the trapped monomers with 60Co γ-radiation yielded short-chain polymer molecules within each tunnel. In specific cases (especially with butadiene) evidence was obtained that the polymerization products were stereoregular. Moreover, the polymer derived from divinylbenzene was uncross-linked in contrast to the form of this polymer obtained by other methods. The clathrate between 4-bromostyrene and I was studied in detail by variable-temperature broad-line 1H NMR techniques and by single-crystal X-ray analysis. The results enable a preliminary correlation to be made between the monomer packing arrangement and the mode of polymerization.

Original languageEnglish (US)
Pages (from-to)697-703
Number of pages7
JournalMacromolecules
Volume15
Issue number3
DOIs
StatePublished - Jan 1 1982

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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