Self-Initiation in Cationic Polymerization
- 1 January 1972
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science: Part A - Chemistry
- Vol. 6 (2) , 329-346
- https://doi.org/10.1080/0022233x.1972.10131859
Abstract
A critical examination of polymerization, dimerization, and isomerization experiments carried out under carefully controlled (anhydrous) conditions leads to the conclusion that polymerization, etc. may proceed in purest monomer/Friedel-Crafts halide systems in the absence of coinitiators. Thus the well-entrenched view that Friedel-Crafts halides always require coinitiator (protogenic impurities) for initiation of cationic polymerizations has to be modified. It is postulated that initiation in purest olefin/Friedel-Crafts halide systems might proceed by a self-initiation mechanism involving the abstraction of an allylic H from the monomer by the Friedel-Crafts halide MXn: The chemistry and evidence for this mechanism are discussed in detail.Keywords
This publication has 25 references indexed in Scilit:
- Stable carbocations. CXIX. Carbon-13 nuclear magnetic resonance spectroscopy study of the structure of allyl cationsJournal of the American Chemical Society, 1971
- Polymerisation des isobutylens durch zweikomponenten‐katalysatorsysteme, die aluminiumhalogenid als eine der komponenten enthaltenDie Makromolekulare Chemie, 1970
- Polymerization of isobutylene catalyzed with ethylaluminium dichlorideCollection of Czechoslovak Chemical Communications, 1969
- Carbonium Ion Salts. IV. TetraiodoboratesJournal of the American Chemical Society, 1962
- CARBONIUM ION SALTS. II. REACTION OF CYCLOHEPTATRIENE WITH INORGANIC HALIDES; TROPENIUM CHLOROBORATE1Journal of the American Chemical Society, 1961
- Carbonium Ion Salts. I. Tropenium and Trityl Bromoborates1Journal of the American Chemical Society, 1961
- The ionic polymerization of cyclic olefins using optically active gegen ionsJournal of Polymer Science, 1961
- Cocatalysis in Friedel-Crafts Reactions. II. Boron Fluoride-WaterJournal of the American Chemical Society, 1957
- Polymerization of isobutene by stannic chlorideTransactions of the Faraday Society, 1952
- Kinetics of the Polymerization of Propylene with Aluminum Bromide—Hydrogen Bromide CatalystJournal of the American Chemical Society, 1948