The cyclic thiophosphazene N3P2SCl5 undergoes thermal ring-opening polymerization when heated at 90 °C. The resultant polymer, [N3P2Cl5]n, is a hydrolytically sensitive, yellow, elastomeric material. This polymer reacts with aryloxide nucleophiles to give poly[(aryloxy)thiophosphazenes] of general structure [N3P2S(OAr)xCly] (x > y). The structures of these polymers were examined with the use of 1H and 31P NMR spectroscopy, elemental microanalysis and gel permeation chromatography. The glass transition temperatures of the polymers were measured by means of differential scanning calorimetry and were found to be in a range from −40 to +79 °C. These Tg values are compared to those of poly(carbophosphazene) and classical phosphazene analogues. Reactions of N3P2SCl5 with NaOCH2CF3 and NaOPh—Ph-o are also described.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry