Morphological Studies of Polyphosphazenes and their Nano-Composites Using Solid-State Nuclear Magnetic Resonance Spectroscopy

Abstract:

Poly[bis(trifluoroethoxy)phosphazene] (PBFP) can be prepared via thermal ring-opening polymerization (ROP) of hexachlorotriphosphazene ((PNCl2)3) or ambient temperature cationic living polymerization (ALP) of monomeric Cl3P=NSiMe3, followed by introduction of OCH2CF3 groups via standard salt metathesis protocols. The resultant polymer morphology is dependent upon synthetic methodology, processing method (e.g. solvent casting, heat cycling, etc.) and the presence of inorganic nanoparticles, which were found to inhibit crystallization. 1H, 19F and 31P solid-state NMR spectroscopy was employed to investigate crystallization in solvent cast and heat-treated samples of pure PBFP and composites of nano-crystalline TiO2 doped PBFP.

• Periodical: Advanced Materials Research (Volume 704)
• Pages: 235-240
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.704.235
• Online since: June 2013
• Authors: Chu Chu Sun, Paul Hazendonk, Alexey S. Borisov, Paul G. Hayes
• Keywords: ¹³C, ¹⁹F, ¹H, ³¹P, Dynamic, MAS NMR Spectroscopy, Morpholoy, Nanocomposite, Nano-TiO₂, PBFP, Polymer, Polyphosphazene, SSNMR

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