Complexation of poly(ethylene oxide) with poly(acrylic acid-co-hydroxyethyl methacrylate)s

Krupers, Maarten J. and Gaag van der, Fred and Feijen, J. (1996) Complexation of poly(ethylene oxide) with poly(acrylic acid-co-hydroxyethyl methacrylate)s. European Polymer Journal, 32 (6). pp. 785-790. ISSN 0014-3057

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Abstract:	Random acrylic acid/hydroxyethyl methacrylate (AA/HEMA) copolymers were synthesized to study the influence of non-ionic (HEMA) structure defects introduced in poly(acrylic acid) on the complex formation with PEO ( 23200) at pH 3¿3.5 in aqueous solution. Complex formation as studied with potentiometric titration (concentration 0.01¿0.03 M monomer residues) was increasingly impeded when the molar ratio of HEMA to AA units in the polymers increased. Copolymers of AA and HEMA with molar ratios 30:1, 10:1 and 3:1 were used in this study. It was shown that in the copolymers the number of carboxylic acid groups taking part in complexation decreased with increasing amounts of HEMA in the copolymer. However, with increasing amounts of structure defects the amount of PEO per AA residue (at equilibrium complexation) increased, suggesting less efficient packing of PEO on the acrylic copolymer chain
Item Type:	Article
Copyright:	© 1996 Elsevier Science
Faculty:	Science and Technology (TNW)
Research Group:	Polymer Chemistry and BioMaterials (PBM)
Link to this item:	http://purl.utwente.nl/publications/9904
Official URL:	http://dx.doi.org/10.1016/0014-3057(95)00184-0
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