Journal
POLYMER
Volume 54, Issue 13, Pages 3188-3197Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2013.04.032
Keywords
Polyphosphonate; Polyelectrolyte; Bisphosphonate
Categories
Funding
- National Science Foundation [DMR 0805179, DMR 1106182, DMR 0851662]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0851662] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1106182, 1263248] Funding Source: National Science Foundation
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Ammonium bisdiethylphosphonate acrylate and methacrylate monomers were synthesized by an aza-Michael addition of 3-aminopropanol across the double bond of bisdiethylphosphonate, followed by acylation with (meth)acryloyl chloride. Free radical copolymerizations of the monomers with an acrylate-functional poly(ethylene oxide) (PEO) macromonomer produced graft copolymers. Quantitative deprotection of the alkylphosphonate groups, then adjustment of the pH to 7.74 +/- 0.03, yielded graft copolymers with zwitterionic ammonium bisphosphonate backbones and PEO grafts. Copolymerization kinetic studies showed that the ammonium bisdiethylphosphonate methacrylate incorporated into the copolymers with PEO-acrylate well, but that the corresponding acrylate monomer reacted too slowly. The zwitterionic copolymers spontaneously assembled into aggregates in aqueous media. (c) 2013 Elsevier Ltd. All rights reserved.
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