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Alkylidenic polymerization of alkynes from w‐based initiators: Kinetics and mechanism of activation by lewis acids
Author(s) -
Lucas Christine,
Soum Alain,
Fontanille Michel
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930660126
Subject(s) - polymerization , chemistry , metathesis , polymer chemistry , monomer , lewis acids and bases , catalysis , kinetics , ring opening metathesis polymerisation , organic chemistry , polymer , quantum mechanics , physics
The polymerization of alkynes initiated by metathesis catalysts proceeds via a mechanism similar to that of the ring‐opening metathesis polymerization of cycloalkenes. Various polymerizing systems have been claimed by several authors as bringing about living character; they point out the strong influence of the substituents carried by the monomer which have been shown to hinder transfer and termination processes. Whatever the initiator used, the activity of the polymerizing system is low; this paper deals with the activation of Rudler type initiator by Lewis acids. The effect of AlR 3 , AlR 2 Cl, AlRCl 2 , BR 3 and B(OR) 3 is presented and discussed.