The poly(organophosphazenes), [NP(OCH3)2]n, [NP(OCH2CH3)2]n, [NP(OCH2CF3)2]n, and [NP(OC6H5)2]n, have been studied by conformational analysis techniques with the use of intramolecular nonbonding 6:12 Lennard-Jones and Coulombic potentials. The energy surfaces reveal broad areas of low potential for the methoxy, ethoxy, and trifluoroethoxy derivatives that are consistent with the very low glass transition temperatures and a high chain mobility. Backbone torsional motions appear to be more restricted for the phenoxy derivative and this is compatible with a higher Tg value. Low potential energy wells are found at points which correspond to the approximately cis-trans conformation inferred from x-ray diffraction data from [NP(OCH2CF3)2]n and [NP(OC6H5)2]n.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry