Diamond, Dermot

Florea, Larisa

Tudor, Alexandru

DCU Online Research Access Service

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Characterization of linear poly(N-isopropyl acrylamide – spiropyran – acrylic acid) copolymer by DSC and UV-Vis spectroscopy

Irish Universities

Name not available

WhiteRlightRirradiatedR0.109RwtRaqueousRpolymerRsolutionxxUNTTUN,,UNF,xx Fxx *xx Nxx Rxx qxx wxxWavelengthCInmpGbsorbanceCIaUCuUpFxCº9F,Cº9F*Cº9FRCº9,wCº99haracterizationCofCLinearCPolyINDIsopropylCGcrylamideC–CSpiropyranC–CGcrylicCGcidpC9opolymerCbyC/S9CandCUVDVisCspectroscopyGlexandruCTudorSCLarisaC+loreadCandC/ermotC/iamondInsightC9entreCforC/ataCGnalyticsSCNationalC9entreCforCSensorCResearchSCSchoolCofC9hemicalCSciencesSC/ublinC9ityCUniversitySC/ublinSCIrelandUIntroductionRTheCliquidCcriticalCsolutionCtemperatureCIL9STpCofCpolyINDisopropylacrylamidepCIpNiPGGmpCisCaCwellCdocumentedCprocessC[T]UCKecauseCofCthisCpropertyCpNiPGGmCbecameCaCveryC attractiveC startingC materialC forC thermoDresponsiveC polymersC andC theC synthesisC ofC hydrogelsUC IncorporationC ofC otherC coDmonomersC inC theC pNiPGGmSC suchC asCphotocromicCunitsSChasCbeenCshownCtoCproduceCpolymersCthatCareCbothCthermoDCandCphotoDCresponsiveC[,U]UCOurCresearchCfocusesConCsynthesizingCaClinearCpolyINDisopropylCacrylamide–spiropyran–acrylicCacidpCIpNiPGGm–SPG–GGpCcopolymerCwhichCcanCchangeCitsChydrophilicityCeitherCbyCwhiteClightCirradiationCorCbyCtemperatureCchangeUCCo-polymerRsynthesis:ConclusionGC functionalC polymerC wasC synthesizedC byC copolymerizingC NiPGGmC withCacrylicCacidCandCSPGUC+romCtheCUVDVisCmeasurementsCtakenSCitCcanCconcludeCthatCtheCpolymerCexhibitsCaCcolorCchangeCuponCirradiationCwithCwhiteC lightCandCalsoCexhibitsCaClowerCcriticalCsolutionCtemperatureCaroundCF,C°9UCTheseCpropertiesC representC aC goodC startingC pointC forC theC synthesisC ofCtemperatureCandClightCresponsiveChydrogelsC[F]UCAcknowledgmentsTheCauthorsCareCgratefulC forC financialC supportC fromC theCMarieC9urieC InitialCTrainingCNetworkCfundedCbyCtheCH9C+PqCPeopleCProgrammeCOrgKIOCIMarieC9urieCITNSCnoUCPFxR*NpUCReference[TU]C9UCKoutrisSCHUC%UC9hatziSC9UCKiparissidesSCPolymerSC38RIT[[qpC,NRqD,NqxU[,U]CKUCSumaruSCMUCKamedaSCTUCKanamoriSCTUCShinboSCMacromoleculesSC37RI,xx*pC*[*[D*[NNU[FU]CMUC9zugalaCetUCalUSCSensors and Actuators B: ChemicalSC194CI,xT*pCTxNDTTFUCCUnirradiatedR0.109RwtRaqueousRpolymerRsolutionxxUNTTUN,,UNF,xx Fxx *xx Nxx Rxx qxx wxxWavelength (nm)GbsorbanceCIaUCuUpFxCº9F,Cº9F*Cº9FRCº9AqueousRPolymerRSolutionTheRinfluenceRofRtemperatureRonRtheRopticalRpropertiesRofRtheRpolymerRsolutionRToC determineC theC influenceC ofC theC temperatureC onC theC absorbanceC ofC theC solutionsC theCtemperatureCwasCvariedCbetweenC,xC°9CandCFRC°9SCinC,°9VminCstepsCfollowedCbyCaCNCminuteCisothermalC periodSC eitherC inC theC darkC orC underC whiteC lightC irradiationUC WhenC theCmeasurementsCwereC takenC inC theCdarkSC aC strongC absorbtionCpeakC isC observedC atC *,xCnmSCcorrespondingCtoCtheCprotonatedCmerocyanineCIM9DH–pCformCofCtheCSPGUCUnderCwhiteClightCirradiationSC thisC peakC almostC completelyC disappearsC becauseC theC M9DH–C changesC itsCconformationCtoCtheCclosedCSPGCformUCThisCformCisCmoreChydrophobicCthanCtheCM9DH–CformSCthusCencouragingCtheCpolymerCtoCprecipitateUCTheseCphotosCshowCaCxUTxPCaqueousCsolutionCofCtheCpolymerCunderCdifferentCtemperatureCandClightingCconditionsU– –TH+PKPOWhiteClight Txx N TInCtheCdarkCatC,x°9 InCtheCdarkCatCFRC°9 UnderCwhiteClightCatC,xC°9 UnderCwhiteClightCatCFRC°9DSCRAnalysis:TheCendothermicCpeakCwhichCappearsCatCF,C °9CconfirmsCtheCexistenceCofCaCL9STCtemperatureUCTheCscanningCintervalCwasCfromCT*C°9CtoCqxC°9CatCaCscanCrateCofCTxC°9VminuteU**UT**UTN**U,**U,N**UF**UFN**U***U*N**UN**UNN**URTx TN ,x ,N Fx FN *x *NTemperatureCI°9pHeatC+lowCImWpHndoxxUx,xUx*xUxRxUxwxUTxUT,xUT*xUTRTw ,x ,, ,* ,R ,w Fx F, F* FR Fw *xTemperatureCI°9pGbsorbanceCatCqxxCnmCIaUCuUpCUnderCWhiteCLight InCtheC/arkTurbidityC isC measuredC asC theC increaseC inC absorbanceC withC theC increaseC inC temperatureSCeitherCforCaCunirradiatedCsolutionCorCforCaCwhiteClightCirradiatedCsolutionU

http://doras.dcu.ie/19902/1/Poster_TAC_2014.pdf

Characterization of linear poly(N-isopropyl acrylamide – spiropyran – acrylic acid) copolymer by DSC and UV-Vis spectroscopy

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Irish Universities

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