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1、NatureandScience2010;8(9)EvaluationandModellingoftheDynamicsofFilledFlexiblePolyurethaneFoam*1223GaniyuKayodeLatinwo,DavidStanAribike,LayioyeOyekunleandAlfredAkpovetaSusu1.DepartmentofChemicalEngineering,LadokeAkintolaUniversityofTechnology,P.M.B.4000,Ogbomoso,210
2、001,OyoState,Nigeria.2.DepartmentofChemicalEngineering,UniversityofLagos,Akoka,LagosState,Nigeria.3.DepartmentofChemicalandPolymerEngineering,LagosStateUniversity,EpeCampus,LagosNigeria.kayodelatinwo@yahoo.comAbstractModelsforflexiblepolyurethanefoamingprocesscont
3、ainingfillerhavebeendevelopedtopredictthedynamicsofthefoamformationsystem.Kineticparametersofthepolymerizationandblowingreactionfortheco-generationofcarbondioxideweredeterminedasnecessaryprecursorsforevaluationofthethermalmodel,assumingthefoamreactionkineticstobec
4、ontrolledbytherateofgenerationofcarbondioxide.Thedynamicsofthefoamprocessevaluatedintermsofthetemperaturespredictedagreewellwiththemeasuredexothermofthefoamgrowthprocessduringinitialfoamgrowth,butwithreactionatgelpoint,thepredictedtemperatureswerehigherthanexperim
5、entallydetermined.Mechanicalpropertiesoffoamandhenceitsqualityhavebeenrelatedtothedynamicsofthefoamformationsystem.Hightemperaturesthatfavourformationofthechemicalspecies–biuretandallophanatepromotesfoamofimprovedqualityinhardness.[NatureandScience2010;8(9):159-16
6、7].(ISSN:1545-0740).Keywords:flexiblepolyurethanefoam,indentationhardness,temperatures,kinetics,calciumcarbonate.IntroductionInapplicationsthatrequirematerialswithhighandeffectiveresistancetocompression,fillershavebeenincorporatedinflexiblepolyurethanefoams.Inmany
7、oftheseapplicationssuchasinmattresses,furniture,andupholstery,itisessentialthatthereactionofthepolyisocyanateandpolyol(poly(tetramethyleneether)glycol)inEquation1toformthepolyurethanemassgoestocompletionsothatmechanicalstrengthisbuildup(VanThuyne1andZeegers,1978)i
8、nthefoamforitseffectiveness.(1)Thepolyurethanemassisblownbyagasproducedinareactionbetweenisocyanateandwaterwhichoccursimultaneouslyasthatinequation1.(2)
