Investigation of the effects of different hydrophilic and hydrophobic comonomers on the volume phase transition temperatures and thermal properties of N-isopropylacrylamide-based hydrogels

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dc.authorid0000-0002-2160-7528
dc.contributor.authorOkudan, Ahmet
dc.contributor.authorAltay, Abdullah
dc.date.accessioned2020-03-26T20:14:55Z
dc.date.available2020-03-26T20:14:55Z
dc.date.issued2019
dc.departmentSelçuk Üniversitesi, Fen Fakültesi, Kimya Bölümüen_US
dc.description.abstractIn this work, a series of thermally responsive terpolymers of N-isopropylacrylamide (NIPA) with three different comonomer contents was synthesized, and their swelling behaviour was studied as a function of composition and temperature. Temperature-sensitive, random cross-linked terpolymers of NIPA were prepared from methyl methacrylate (MMA), N-tert-butylacrylamide (NTBA), and acrylic acid (AA) using a free radical polymerization method. In the synthesis of terpolymer hydrogels, N,N-methylene bisacrylamide (BIS) was used as cross-linkers and ammonium persulfate (APS) as initiator. The NIPA content of the monomer feed varied from 80 to 50mol %, and other comonomer feed varied from 40 to 5mol %. The swelling equilibrium of these hydrogels was studied as a function of temperature and hydrophobic and hydrophilic comonomer contents. The swelling properties of the polymers were investigated in pure water at temperatures from 10 to 80 degrees C. All of the synthesized gels were found to be sensitive to temperature. Glass transition temperature analyses and thermal analyses of the synthesized hydrogels were studied. The volume phase transition temperature and the swelling equilibrium (r) values of NIPA-based hydrogels synthesized in different feed ratios and in varying monomer contents were found in the range of 17-52 degrees C and 14-51g H2O/g polymer, respectively. The glass temperature (Tg) of the NIPA/AA/(MMA or NTBA) hydrogels synthesized with feed ratios of 50/40/10 was found to be 133 or 142 degrees C, respectively. The initial and the end degradation that were determined for hydrogels at high temperatures indicated the quite good thermal stability of hydrogels. When the mass loss of the synthesized hydrogels was 50%, the temperatures were measured between 247 and 258 degrees C.en_US
dc.description.sponsorshipSelcuk Universitesi Research Foundation [BAP-09201019]en_US
dc.description.sponsorshipThis study presented was supported by the Selcuk Universitesi Research Foundation (project number: BAP-09201019).en_US
dc.identifier.citationOkudan, A., Altay, A. (2019). Investigation of the Effects of Different Hydrophilic and Hydrophobic Comonomers on the Volume Phase Transition Temperatures and Thermal Properties of N-Isopropylacrylamide-Based Hydrogels. International Journal of Polymer Science, 2019, 1-12.
dc.identifier.doi10.1155/2019/7324181en_US
dc.identifier.issn1687-9422en_US
dc.identifier.issn1687-9430en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.urihttps://dx.doi.org/10.1155/2019/7324181
dc.identifier.urihttps://hdl.handle.net/20.500.12395/37955
dc.identifier.volume2019
dc.identifier.wosWOS:000472859200001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOkudan, Ahmet.
dc.institutionauthorAltay, Abdullah.
dc.language.isoenen_US
dc.publisherHINDAWI LTDen_US
dc.relation.ispartofINTERNATIONAL JOURNAL OF POLYMER SCIENCEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjecthydrophilic
dc.subjecthydrophobic
dc.subjectcomonomers
dc.subjectN-isopropylacrylamide
dc.subjectthermal properties
dc.subjecthydrogels
dc.titleInvestigation of the effects of different hydrophilic and hydrophobic comonomers on the volume phase transition temperatures and thermal properties of N-isopropylacrylamide-based hydrogelsen_US
dc.typeArticleen_US

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