Synthesis of poly[1,1-bis(trimethylsilyloxy)-3,3,5,5-tetramethyltrisiloxane] by anionic ring-opening polymerization of 1,1-bis(trimethylsilyloxy)-3,3,5,5-tetramethylcyclotrisiloxane

Abstract

Poly{1,1-bis(trimethylsilyloxy)-3,3,5,5-tetra-methyltrisiloxane], the first linear polysiloxane in which each third silicon atom of the polymer backbone is a tetrafunctional SiO 2 (Q) unit, has been prepared by anionic ring-opening polymerization of 1,1-bis(trimethylsilyloxy}-3,3,5,5-tetramethylcyclotrisiloxane.