Complex metaphosphate polymers

Abstract

The complexation reaction of the polymeric metaphosphate ions has been studied with copper, calcium, barium, zinc, lead, and iron ions by physicochemical measurements indicating the formation of complex derivatives of the type (NaxM1−x/aPO3)n where a is the valency of the metal ion complexed. It has been possible to synthesize a large number of derivatives for the first time by the reactions of the following type: The progress of the reaction has been studied on a Stanton Thermogravimetric balance and the properties (composition, viscosity, molecular weight, and conductivity) of the transparent glassy complex metaphosphates have been studied in detail throwing fresh light on Graham's salt itself as well as these new derivatives.

Thermal analysis of copolyphosphates

“…Samples of copolyphosphates with a general formula {NaxM (i-z)/a POa}n (x has values of i/a, 1/2 or 2/a, M stands for the counter cation -lithium, copper or zinc -and 'a' is the valence of the metal M), were prepared by a method similar to that described by Mehrotra and Gupta (16)(17)(18). All the chemicals used were of reagent grade.…”

Intrinsic Viscosity–Molecular Weight Relationships in Copolyphosphates

“…5 • 7 · 8 have used all these techniques in a number of cases involving simple polyphosphates and Mehrotra et a/. 9 used the technique of end-group titration and viscosity in the case of compounds which could be termed 'copolyphosphates.' These are counter cation copolymers containing two kinds of cations attached to a polyphosphate chain -P-0-P-0-P-0, etc.…”

“…These are counter cation copolymers containing two kinds of cations attached to a polyphosphate chain -P-0-P-0-P-0, etc. Mehrotra et a/., 9 however, simply used the intrinsic viscosity [IJ]-weight-average molecular weight (Mw) relationship given by Strauss et a/. 4 for sodium polyphosphates without realizing that it could not hold good in the case of other poly-and copolyphosphates.…”