Flow behavior of hydroxypropyl methyl cellulose/polyacrylic acid interpolymer complexes in aqueous media

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dc.contributor.authorŞakar-Deliormanli A.
dc.date.accessioned2024-07-22T08:19:09Z
dc.date.available2024-07-22T08:19:09Z
dc.date.issued2012
dc.description.abstractThe intermolecular complexation of non-ionic polymers with weak acids having chemically complementary structures is an important approach to modify the viscosity of polymer solutions. In this study intermolecular complexation of hydroxypropyl methyl cellulose (HPMC) with polyacrylic acid (PAA) in an aqueous medium was studied. The study focuses on the factors affecting the complexation and rheological behavior of the HPMC/PAA system including the stoichiometric ratio of the two polymers, the molecular weight of the PAA, and the pH and ionic strength of the medium. Results showed that interpolymer complexation occurred between HPMC and PAA at low pH. It was attributed to hydrogen bonding between the -COOHgroup of the PAA and the -OH group of the HPMC. Underbasic conditions (above the critical pH) the viscosity of the interpolymercomplex increased accompanied by a transition from a compact interpolymer complexation structure to an extended conformation of interpolymer associates. Introduction of monovalent and multivalent salts (at > pHcritical) decreased the viscosity of the HPMC/PAA interpolymer associates and favored the formation of interpolymer complexes between the two polymers. © 2012 Society of Chemical Industry.
dc.identifier.DOI-ID10.1002/pi.4266
dc.identifier.issn10970126
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/17553
dc.language.isoEnglish
dc.subjectCellulose
dc.subjectHydrogen bonds
dc.subjectIonic strength
dc.subjectOrganic acids
dc.subjectRheology
dc.subjectAqueous media
dc.subjectAqueous medium
dc.subjectFlow behaviors
dc.subjectIntermolecular complexation
dc.subjectInterpolymer complexation
dc.subjectInterpolymer complexes
dc.subjectMethyl cellulose
dc.subjectMultivalent salts
dc.subjectNonionic polymers
dc.subjectOH group
dc.subjectPolyacrylic acids
dc.subjectRheological behaviors
dc.subjectStoichiometric ratio
dc.subjectWeak acids
dc.subjectViscosity
dc.titleFlow behavior of hydroxypropyl methyl cellulose/polyacrylic acid interpolymer complexes in aqueous media
dc.typeArticle

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