THERMAL STABILITY OF SOME METALLOSILOXANES,
Abstract
In a study of the inherent thermal stability of metallosiloxane systems, some model compounds were prepared in a pure state and their behaviour on heating in absence of air was examined. The compounds studied were: (a) (Me3SiO)nM, where M = Si(n=4), Ge(n=4), Sn(n=4), Ti(n=4), and Al(n=3); (b) (Et3SiO)3Al and (Et3SiO)4Ti; (c) (Ph3SiO)4Sn, (Ph3SiO)4Ti and (PhSiO)3Al. It is concluded that introduction of M-O-Si linkages into polysiloxanes is most unlikely to lead to an increase in thermal stability. In liquid polymers it will, exept when M=Ge, lead to a marked fall in stability, but in solid systems the thermal stability could be acceptable if other desirable properties were present. The marked hydrolytic instability of the M-O-Si linkages, except when M=Ge, will place a severe limitation on the usefulness of polymers containing them. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0645722
Entities
People
- G. E. Legrow
- J. A. Bedford
Organizations
- University of Sussex