Olefin Polymerizations and Copolymerizations with Aluminum Alkyl-Cocatalyst Systems. V. The Molecular Weight and Molecular Weight Distribution of Polystyrene
- 1 August 1969
- journal article
- research article
- Published by Taylor & Francis in Journal of Macromolecular Science: Part A - Chemistry
- Vol. 3 (5) , 885-895
- https://doi.org/10.1080/10601326908051922
Abstract
The polymerization of styrene with the cationic initiator system AlR2Cl/RCl was investigated further. Earlier conclusions [1] were corroborated and expanded by an analysis of the number and weight average molecular weights. Alkyl halides with low (high) R‒Cl bond dissociation energies are efficient (poor) coinitiators of the polymerization of styrene. In the presence of efficient RCl coinitiators, the molecular weights strongly decrease and the molecular weight distributions strongly increase with increasing conversions (Fig. 1). With poor cointiators, only low conversions are obtained even in the presence of large amounts of AlEt2Cl. The data are discussed in terms of a previously proposed mechanism [1].Keywords
This publication has 2 references indexed in Scilit:
- Olefin Polymerizations and Copolymerizations with Aluminum Alkyl-Cocatalyst Systems. IV. The Polymerization of StyreneJournal of Macromolecular Science: Part A - Chemistry, 1969
- Cationic Catalyzed Polymerization of Styrene at High ConversionJournal of the American Chemical Society, 1962