Formation-destruction conditions of an interpolymer complex between a poly(acrylic acid) gel and linear poly(ethylene glycol) in methanol

Esen Abikenovich Bekturov, Vera A. Frolova, Galymzhan Kulamkadyrovich Mamytbekov

2000

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DOI 10.1002/1521-3935(20000601)201:10<1031::aid-macp1031>3.0.co;2-6
Data confidence 70 medium
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Abstract

The contraction of a poly(acrylic acid) gel (GPAAc) (1) induced by complexation with linear poly-(ethylene glycol) (PEG) (2) in methanol media proceeds in a similar manner to that in aqueous solution. It was found that both the concentration and molecular mass of the PEG have a strong effect on the complexation with GPAAc. The existence of a stable interpolymer complex between components under consideration takes place in the range of lower and upper critical values of molecular mass (CMM) of the linear polymer. Outside of these CMM values of PEG no perfect complexation occurred due to thermodynamic and kinetic reasons. The structure of the interpolymer complex formed due to the hydrogen bonding is destabilized as a result of ionization and the changing of the thermodynamic characteristics of the solvent under addition of dimethylsulfoxide to methanol.