Ring-Ring and Ring-Chain Equilibration of Phosphazene Polymerization.
Abstract
Hexamethylcyclotriphosphazene, (NP(CH3)2)3 (III), and octamethylcyclotetraphosphazene (NP(CH3)2)4 (IV) participate in a ring-ring equilbration at temperatures between 200 and 350, but they do not polymerize. A deltaH value of 10.2 kcal and a deltaS value of 14.3 eu were determined for the tetramertrimer interconversion. The equilibration is inhibited by base. Acids accelerate equilibration and also yield linear low molecular weight compounds. The results are compared with the ring-high polymer interconversions in the halogenophosphazene series.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1976
- Accession Number
- ADA021932
Entities
People
- Dennis B. Patterson
- Harry R. Allcock
Organizations
- Pennsylvania State University