Synthesis and characterization of phosphonate-containing polysiloxanes

• Published in: Journal of polymer science. Part A, Polymer chemistry Vol. 41; no. 1; pp. 48 - 59
• Main Author: Gallagher, Skip
• Format: Journal Article
• Language: English
• Published: New York Wiley Subscription Services, Inc., A Wiley Company 01-01-2003; Wiley
• Subjects: alkoxysilane; Applied sciences; copolymers; Exact sciences and technology; Inorganic and organomineral polymers; Michaelis-Arbuzov; monomers; NMR; phosphonate; phosphonic acid esters; Physicochemistry of polymers; polysiloxanes; Preparation; copolymers; phosphonic acid esters; Phosphorus copolymer; Michaelis-Arbuzov; Solution polycondensation; monomers; phosphonate; Organic phosphonate; Experimental study; Functional polymer; Hydrolysis; Polyelectrolyte; Chemical modification; NMR; alkoxysilane; Preparation; polysiloxanes; Dimethylsiloxane copolymer; Siloxane copolymer
• ISSN: 0887-624X; 1099-0518
• DOI: 10.1002/pola.10550

Phosphonate‐functionalized polysiloxanes have been prepared with a new siloxane/phosphonate monomer. The reaction of 3‐chloropropylmethyldimethoxysilane with trimethylphosphite or triethylphosphite produces several new monomers containing pendant phosphonate groups. Copolymerization with dimethyldimethoxysilane has produced polymers soluble in most organic solvents. The acid hydrolysis of the phosphoryl esters has produced hydrophilic siloxane polymers containing phosphonic acid groups. The thermal properties of the polymers and several related small molecules have been compared with thermogravimetric analysis. Both the monomers and the resulting polymers have been characterized with 1H, 13C, 31P, and 29Si NMR. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 48–59, 2003
Phosphonate‐functionalized polysiloxanes have been prepared with a new siloxane/phosphonate monomer. The reaction of 3‐chloropropylmethyldimethoxysilane with trimethylphosphite or triethylphosphite produces several new silicone monomers containing a pendant phosphonate group connected by a three‐carbon bridge. The copolymerization of these monomers with dimethyldimethoxysilane has produced viscous polymers soluble in common organic solvents. The acid hydrolysis of the copolymer generates hydrophilic phosphonic acid groups attached to a siloxane backbone. Both the monomers and the resulting polymers have been characterized with 1H, 13C, 31P, and 29Si NMR.