Interpolymer complexes based on N-isopropylacrylamide copolymers and polyacrylic acid

R. K. Rakhmetullayeva, G. A. Mun, E. M. Shaikhutdinov, U. Nakan, Zh. K. Bagitova

Abstract


Interpolymer complexes based on N-isopropylacrylamide and 2-hydroxyethylacrylate copolymers (NIPAAm-co-HEA) and polyacrylic acid were investigated by turbidimetric method. The influence of the molecular mass of polyacid, the copolymer composition and the ionic strength of the solution on the critical pH of complexformation was shown. Phase transition behavior of interpolymer complexes in aqueous solutions based on poly(NIPAAm-co-HEA) (for three different compositions) and PAA was investigated. It was revealed that the temperature at which phase transition occurs was dependent on the initial monomer mixture of poly(NIPAAm-co-HEA) and the composition of interpolymer complexes.

Keywords


N-isopropylacrylamide (NIPAAm); interpolymer complexes; thermosensitive copolymer; 2-hydroxyethylacrylate (HEA); polyacrylic acid

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References


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