PLAisabiobased-materialparticularlyattractiveduetoitsopticalandthermalproperties,anditisconsideredachallengingcandidateforthereplacementofoil-basedpolymers.However,thelargescaleapplicationofPLAislimitedduetoitspoormechanicalproperties,poorthermalresistance,lowgasandvaporbarrier1.Inthiscontext,nanocompositematerialsofferanewandpromisingprospectivesincetheyexhibitsignificantchangesofphysicalpropertieseveninthepresenceofsmallamounts(i.e.lessthan3%)ofnanosizedfillers.Thedispersionofnanofillersinapolymermatrixisgenerallyachievedbytuningtheinterfacialpropertiesthroughthechemicalfillermodificationandtheuseofsuitablecouplingagents. Inthisworkpoly(lacticacid)(PLA)nanocompositeswerepreparedviameltblendingwithdifferentnanofillerspreviouslydispersedinlowmolecularweightpolyesterswhichweregenerallyusedasplasticizers.Theultimateaimwastoimprovebothmechanicalfeaturesanddispersion/distributionofthefiller.
The use of plasticizers as coupling agents in preparation of PLA based nanocomposites
CDe Monte;
2013
Abstract
PLAisabiobased-materialparticularlyattractiveduetoitsopticalandthermalproperties,anditisconsideredachallengingcandidateforthereplacementofoil-basedpolymers.However,thelargescaleapplicationofPLAislimitedduetoitspoormechanicalproperties,poorthermalresistance,lowgasandvaporbarrier1.Inthiscontext,nanocompositematerialsofferanewandpromisingprospectivesincetheyexhibitsignificantchangesofphysicalpropertieseveninthepresenceofsmallamounts(i.e.lessthan3%)ofnanosizedfillers.Thedispersionofnanofillersinapolymermatrixisgenerallyachievedbytuningtheinterfacialpropertiesthroughthechemicalfillermodificationandtheuseofsuitablecouplingagents. Inthisworkpoly(lacticacid)(PLA)nanocompositeswerepreparedviameltblendingwithdifferentnanofillerspreviouslydispersedinlowmolecularweightpolyesterswhichweregenerallyusedasplasticizers.Theultimateaimwastoimprovebothmechanicalfeaturesanddispersion/distributionofthefiller.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
