Preparation and Degradation of Polysilylenes
Abstract
Mechanistic aspects of preparation and degradation of polysilylenes (polysilanes) are discussed. Reductive coupling of disubstituted dichlorosilanes at ambient temperatures in the presence of ultrasound leads to monomodal polymers with relatively narrow molecular weight distributions (M sub w/M sub n from 1.2 to 1.5) and relatively high molecular weights (M sub N from 50,000 to 100,000). Ring-opening polymerization of cyclotetrasilanes initiated with carbanions and silyl anions provides polymers with molecular weights from 10,000 to 100,000 and gives potential possibility of the microstructure control. Synthesis and solid state transitions in random copolysilylenes are discussed. Thermal, mechanical, and chemical degradation of polysilylenes is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 02, 1991
- Accession Number
- ADA235358
Entities
People
- Krzysztof Matyjaszewski
Organizations
- Carnegie Mellon University