Study of interaction between cetyltrimethylammonium bromide and poly (acrylic acid) by rheological measurements

Article Abstract:

Rheological measurements are used to investigate the interaction between the cationic surfactant cetyltrimethylammonium bromide (CTAB) and the anionic polyelectrolyte poly (acrylic acid) (PAA), having molecular weight by viscosity of 750 kDa. The result states that the pH values of the PAA/CTAB solutions are less than those of neat CTAB or PAA solutions, which indicate the possible formation of 'ion pairs' and thus increase the degree of dissociation of PAA.

Surface active agents, Surface Active Agent Manufacturing, Cationic Surfactants, Bromides, Bromides (Chemistry)

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Mass transport in thermoresponsive Poly(N-isopropylacrylamide-co-acrylic acid) hydrogels studied by electroanalytical techniques: swollen gels

Article Abstract:

Electrochemical methods, steady state voltammetry and chronoamperometry are used to measure the temperature dependency of the diffusion coefficient of 1-1'-Ferrocenedimethylanol and 2,2,6,6-tetramethyl-1-piperidinyloxy, TEMPO in aqueous solution and (N-isopropylacrylamide-co-acrylic acid)NIPA-AA thermosensitive gels. The obstruction effect and hydration effect successfully predicted the diffusion coefficient of TEMPO in the NIPA-AA gel.

Thermal properties, Aqueous solution reactions

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Diffusion of uncharged probe reveals structural changes in polyacids initiated by their neutralization: Poly(acrylic acids)

Article Abstract:

The process of Poly (acrylic acids) (PAA) gelation and the transport properties of the resulting polyelectrolyte as a function of the amount of added strong base and the molecular weight of the PAA employed are studied. The result reveals that the most ordered structured of the polyelectrolyte, the most permeable structure, is obtained when PAA is neutralized at 75-80%.

All Other Miscellaneous Chemical Product and Preparation Manufacturing, Chemical preparations, not elsewhere classified, Polyelectrolytes, Polymers

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