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A fast catalyst system for the ring‐opening polymerization of cyclosiloxanes
Author(s) -
Molenberg Aart,
Möller Martin
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030160606
Subject(s) - octamethylcyclotetrasiloxane , polymerization , polymer chemistry , phosphazene , catalysis , bulk polymerization , chemistry , cationic polymerization , materials science , chemical engineering , polymer , radical polymerization , organic chemistry , engineering
Methanol, in combination with a non‐ionic phosphazene base, was used to initiate the polymerization of octamethylcyclotetrasiloxane. In bulk, an instantaneous and large increase in viscosity was observed upon addition of the initiator. In toluene solution, the equilibrium state was reached in approximately 1 min. In addition to its high polymerization rate, another advantage of this system, as compared with e.g. alkali metal hydroxides, is that it is homogeneous.