PHOSPHONITRILIC FLUOROALKOXIDE POLYMERS,
Abstract
A series of fluoroalkoxy substituted trimeric phosphonitrile ring compounds has been prepared. Attempts to polymerise the hexa(fluoroalkoxy) triphosphonitriles failed. Unsymmetrical substituted derivatives containing two different fluoroalkoxy groups have been evaluated as high temperature fluid materials. Substitution of fluoroalkoxy groups into phosphonitrilic chloride rubbery high polymer has yielded hydrolytically stable elastomers of poor thermal stability, in which considerable cross-linking is postulated. The preparation and properties of some fluoroalkyl phosphites and chlorophosphites are described. Phosphonitrile polymer formation from these materials by reaction with alkali metal azides proved impossible. Attempts to prepare bis(fluoroalkoxy) trichlorophosphoranes failed to yield the required materials. All attempts at the partial replacement of the chlorine atoms in phosphonitrilic chloride trimer, by fluoroalkoxy groups, gave complex isomer mixtures of varying degrees of substitution from which pure materials could not be separated. A series of diamino tetrakis(fluoroalkoxy)triphosphonitriles has been prepared, and the condensation polymerisation with fluorinated dihydroxy alcohols studied. The products of the condensation are in some cases elastomeric, and may lead towards a new type of potentially useful rubbery material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1966
- Accession Number
- AD0643548
Entities
People
- M. V. Lenton