Thermal stability of ionene polymers

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorCampos, Valquíria
dc.creatorDweck, Jo
dc.creatorNascimento, Cláudio A. O.
dc.creatorTcacenco, Celize M.
dc.date2014-05-27T11:29:34Z
dc.date2016-10-25T18:48:52Z
dc.date2014-05-27T11:29:34Z
dc.date2016-10-25T18:48:52Z
dc.date2013-06-01
dc.date.accessioned2017-04-06T02:24:55Z
dc.date.available2017-04-06T02:24:55Z
dc.identifierJournal of Thermal Analysis and Calorimetry, v. 112, n. 3, p. 1221-1229, 2013.
dc.identifier1388-6150
dc.identifierhttp://hdl.handle.net/11449/75490
dc.identifierhttp://acervodigital.unesp.br/handle/11449/75490
dc.identifier10.1007/s10973-012-2694-7
dc.identifierWOS:000319358500011
dc.identifier2-s2.0-84878711444
dc.identifierhttp://dx.doi.org/10.1007/s10973-012-2694-7
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/896234
dc.descriptionTwo different cationic polymers of the same chemical type and with very similar chemical structures were reacted with a natural bentonite over a wide range of polymer/clay ratios. This study involved the synthesis of cationic aliphatic ammonium polyionenes, specifically 3,6-ionene and 3,6-dodecylionene. Ionenes are ion-containing polymers that contain quaternary nitrogen atoms in the main macromolecular chain as opposed to a pendant chain. The CHN content, basal spacing, and elemental composition of each of the polymer-clay complexes were analyzed by X-ray diffraction, X-ray fluorescence, and thermogravimetry. All the polycations reacted to form interlayer complexes with clay, which displaced more Na+ and little Ca2+. Sodium and calcium were both present as interlayer cations in the clay and its complexes. The TG/DTG curves show that both polymers underwent thermal degradation in more than one stage. Specifically, 3,6-ionene was found to undergo two stages of decomposition and 3,6-dodecylionene undergo three stages. The behavior of the TG/DTG curves and the activation energy values suggest that 3,6-dodecylionene (E = 174,85 kJ mol-1) complexes have greater thermal stability than 3,6-ionene (E = 115,52 kJ mol-1) complexes. The mechanism of degradation suggests a direct interaction with the dodecyl chain containing 12 carbons, which are present in 3,6-dodecylionene but not in 3,6-ionene. © 2012 Akadémiai Kiadó, Budapest, Hungary.
dc.languageeng
dc.relationJournal of Thermal Analysis and Calorimetry
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectClay-polymer complexes
dc.subjectIonenes
dc.subjectSmectite
dc.subjectThermal analysis
dc.subjectElemental compositions
dc.subjectIon-containing polymers
dc.subjectMacromolecular chain
dc.subjectMechanism of degradation
dc.subjectQuaternary nitrogens
dc.subjectSmectites
dc.subjectActivation energy
dc.subjectBentonite
dc.subjectCalcium
dc.subjectNatural polymers
dc.subjectThermoanalysis
dc.subjectThermodynamic stability
dc.subjectThermogravimetric analysis
dc.subjectX ray diffraction
dc.subjectPolymers
dc.titleThermal stability of ionene polymers
dc.typeOtro


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