Phosphazine polymer

Phosphorus is an abundant spin- nucleus that occurs more frequently in biopolymers than in synthetic polymers. In biopolymers, the chemical shifts are related to the phosphate conformation and the ionisation state. Phosphorus NMR has been used to characterise synthetic polymers such as poly(phosphazines) [13]. The P chemical shifts provide a probe of the polymer backbone in such polymers. 

SEC has been used in the determination of a range of polymers including polyepichlorohydrin [99], polybis(carboxylato phenoxy phosphazine [100], polyarylene ethynylene [101], PMMA - polydimethyl siloxane grafts [102], surfactants [103], polycarbonate [104], PMMA [58], polybutadiene [105], polyelectrolytes [106], aliphatic oligoamide [107], PET [108], and polyvinyl alcohol [109]. 

Size exclusion chromatography-mass spectroscopy has been applied to structural and molecular weight studies on silicon containing polymers including hyperbranched alkoxysiloxane [30], polydimethyl siloxane [31], methyl acryloxypropyl trimethoxy silone [32] and phosphazines. 

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