Dihydrophilic block copolymers with ionic and nonionic blocks. I. Poly(ethylene oxide)-b-polyglycidol with OP(O)(OH)(2) COOH, or SO3H functions: Synthesis and influence for CaCO3 crystallization
K. Kaluzynski et al., Dihydrophilic block copolymers with ionic and nonionic blocks. I. Poly(ethylene oxide)-b-polyglycidol with OP(O)(OH)(2) COOH, or SO3H functions: Synthesis and influence for CaCO3 crystallization, J POL SC PC, 39(7), 2001, pp. 955-963
Citations number
22
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Dihydrophilic block copolymers of poly(ethylene oxide)-b-polyglycidol were
prepared and polyglycidol blocks converted into ionic blocks containing -OP
(O)(OH)(2), -COOH, or SO3H groups. Although phosphorylation of polyhydroxy
compounds with POCl3 usually leads to insoluble products, phosphorylation o
f poly(ethylene oxide)-b-polyglycidol using a POCl3/-OH ratio equal to 1/1
gave soluble products, predominantly monoester of phosphoric acid (after hy
drolysis) (provided that the reaction was conducted in triethyl phosphate a
s solvent). All copolymers were characterized by H-1 NMR, C-13 NMR, and/or
P-31 NMR spectra for confirming their structure. The degree of substitution
was determined from quantitative C-13 NMR spectroscopy (inverted-gate deco
upling-acquisition mode). Preliminary results indicate that from these thre
e groups of block copolymers the phosphoric acid esters are the most effect
ive ones at least in controlling the growth of CaCO3 crystals in aqueous so
lution. (C) 2001 John Wiley & Sons, Inc.