Preparations of Triphenylmethyl Salts and Their Use in the Cationic Polymerization of α-Methylstyrene. Counteranion and Polymer Structure

Toyoki Kunitake, Shun'ichi Tsugawa

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Triphenylmethyl salts which contain metal chlorides or bromides as the anion were prepared systematically, and employed as initiator for the cationic polymerization of α-methylstyrene. The isotactic unit content of the polymer was found to correlate with the anion size in a relatively simple way except for pentacoordinate anions. This was explicable by considering the steric effect of the counteranion and the coulombic interaction of the growing ion pair. Pentacoordinated counteranions gave rise to greater amounts of the isotactic unit than expected from their sizes, and, in the case of Ph3SnCl4Br, the polymer steric structure was dependent on the initiator concentration. These results were attributed to the peculiar structural characteristics of these anions.

本文言語英語
ページ(範囲)709-713
ページ数5
ジャーナルMacromolecules
8
6
DOI
出版ステータス出版済み - 11 1 1975

All Science Journal Classification (ASJC) codes

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

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