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Anionic polymerization of cyclosiloxanes in heterogeneous medium

✍ Scribed by Maria Cazacu; Mihai Marcu; Stela Dra̧gan; Carmen Matricala̧

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
314 KB
Volume
60
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Anionic polymerization of various cyclosiloxanes [octamethylcyclotetrasiloxane (D4), 1,3,5,7tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane (V4), and hexamethylcyclotrisiloxane (DJ] was performed. As catalysts, IRA-900 and PB-100 type anionites with benzyltrimethylammonium and 3-acrylamidopropylbenzyldimethylammonium groups, respectively, were used. The anionite with higher strongly basic exchange capacity (IRA-900) is more efficient in dimethylcyclosiloxane polymerization. PB-100 anionite with less strongly basic capacity is more active for polymerization of the V4 monomer with bulky and electronegative substituent.

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