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Published on: January 19, 2016
Silicon Acetal Metathesis Polymerization
Ertugrul Sahmetlioglu1, Ha Thi Hoang Nguyen1, Olivier Nsengiyumva1
1The George and Josephine Butler Laboratory for Polymer Research, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States.
Abstract:
A kinetic study revealed that the acid-catalyzed (p-TSA) equilibration of Me2Si(OMe)2 and Me2Si(OEt)2, forming Me2Si(OEt)OMe, is established in 300 min in benzene at room temperature. This silicon acetal metathesis reaction is exploited for the step-growth polymerization of bis-silicon acetals (MeOSiMe2OROSiMe2OMe) with metathetical loss of Me2Si(OMe)2. Thus, a convenient and generalized silicon acetal metathesis polymerization (SAMP) method is introduced as the acid-catalyzed copolymerization of a diol (HOROH) and Me2Si(OMe)2, driven by elimination of methanol and/or Me2Si(OMe)2. SAMP constitutes an effective and powerful strategy for manipulating the most common bond in the Earth's crust, the silicon-oxygen bond.
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