Synthesis of trifluoromethyl- and methylphosphazene polymers: differences between polymerization and initiator/terminator properties

Harry R. Allcock, Christine R. De Denus, Robbyn Prange, James M. Nelson

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A new polyphosphazene, [N=PPh(CF3)]n, has been prepared via the PCl5-induced cationic polymerization of Me3SiN=P(CF3)(Ph)Br. In addition, the cationic route has been used to produce [N= PPh(Me)]n with controlled molecular weights and narrow polydispersities. By contrast, the new monomer Me3SiN=P(t-Bu)(Ph)F failed to polymerize under any conditions but was used as an initiator and terminator to prepare both mono- and ditelechelic polymers. This monomer was also used to prepare [F(Ph)(t-Bu)P=N(PCl2=N)P(t-Bu)(Ph)F]+, which was used as a substrate for reactions with alkoxy and aryloxy groups to yield the hydrolytically stable materials, [R(Ph)(t-Bu)P=N(PR2=N)P(t-Bu)(Ph)R2].

Original languageEnglish (US)
Pages (from-to)7999-8004
Number of pages6
Issue number24
StatePublished - Nov 30 1999


All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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