Journal
GREEN CHEMISTRY
Volume 8, Issue 8, Pages 727-730Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b602462a
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Direct, efficient, solvent and catalyst-free synthesis of a series of polyphosphates was accomplished. The reaction involved a gas-liquid interfacial polycondensation between alkyl( aryl) phosphoric dichlorides and aromatic diols. The polyphosphates were characterized by IR, H-1 NMR, inherent viscosity, thermal analysis, X-ray diffractions and molar mass. Yields in the range 75-90% and inherent viscosities in the range 0.24-0.45 dl g (-1) were obtained. Polyphosphates were stable up to 170-250 degrees C, depending on phosphoric dichloride type. The X-ray diffraction patterns revealed that almost all the polymers were amorphous.
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