Poly(vinylalcohol) as polymeric support for metal chelating phosphoric acid and derivatives

Abstract

Synthesis and application of several polymeric agents based on poly(vinylalcoho1) with phosphorus containing functional groups were investigated. Monomer and polymer syntheses of phosphoric acid and derivatives with poly(vinylalcoho1) are described. Multifunctional derivatives of the hydrophilic polymer were obtained by polymer-analogous reactions with mono and diethyl esters of phosphoric acid. Studies on chelating properties of the polychelatogenes at different pH values for nickel were carried out by means of membrane filtration. Metal determination in filtrate and retentate yielded typical chelating curves. Differences of the polymer supports and influences of the functional groups are discussed. ZUSAMMENFASSUNG:Die Synthese und Anwendung von mehreren polymeren Agentien auf der Basis von Poly(vinylalkohol), die funktionelle Gruppen mit Phosphor enthalten, wurde untersucht. Die Monomer-und Polymersynthese von Phosphorsaure und ihrer Derivate mit Poly(vinylalkoho1) werden beschrieben. Durch polymeranaloge Reaktionen mit Mono-und Diethylestern der Phosphorsaure wurden multifunktionelle Derivate dieses hydrophilen Polymers erhalten. Untersuchungen m den Komplexbildungseigenschaften der Polychelatogene wurden mit Hilfe der Membranfiltration fur Nickel bei verschiedenen pH-Werten durchgefuhrt. Typische Komplexierungskurven wurden nach Bestimmung des Metallgehalts im Filtrat und Retentat erhalten. Unterschiede der polymeren Trager und Einfliisse der funktionellen Gruppen werden diskutiert.

Synthesis and copolymerization of new phosphorus‐containing acrylates

“…Another approach to phosphorus‐containing polymers is simple modifications of polymers with phosphorus‐containing groups, such as those through the phosphorylation of poly(vinyl alcohol), cellulose, and polydienes. This leads to improvements in flame retardancy over unmodified polymers 18–20. Also, polymers with phosphorus in the backbone may be synthesized by polycondensation or ring‐opening polymerization methods 21–30…”

Polyureas

“…A wide range" of polyureas, all based on thiophene 2,5-diisocyanate (55), were synthesized using the various aliphatic and aromatic diamines (56) to (60). OCN-o-NCO (55) H 2 N -Ec H2j;-NH 2 (56) (57) H 2N-fCH21,;-NH2 (58) H2N-o-NH2 (59) H2N-0-cH2-o-NH2 (60) An interesting class of polyureas containing sugar residues has recently been reported.?" It 'is interesting to note that in the aliphatic materials containing methylene sequences +CH 2 in, thermal stability appears to depend more on whether n is even or odd than on its magnitude: increasing n from 2 to 6 causes only a small increase, whereas changing n from 2 to 3 produces a reduction in weight loss which is much bigger.…”

Peculiar Behavior of Degenerative Chain Transfer Polymerization of a Phosphonated Methacrylate

“…Different approaches have been utilized to introduce the phosphorus‐containing functionalities. The first one consists of a chemical modification of polymers through phosphorylation 7. Alternatively, polymerization and copolymerization of phosphorus‐containing vinyl monomers can be achieved 8.…”