SiO2 composites

SiO2 compositesAvailableonlineatwww．sciencedirect．corn·：；：，ScienceDirect够鼢JOURNALOFRAREEARTHS,VoL29,No．盂May2011，只444www．re-journaLcom#en／StudyonthecuringpropertiesofSBR／La-GDTC／Si02compositesYANGShuyan(杨树颜)，LIULan(刘岚)，JIAZhixin(贾志欣)，JIADemin(贾德民)，LUOYuanfang(罗远芳)(CollegeofM,uemL,SdenceandEngineering,SouthChinaUniversityofTechnology,Gnangzhou510640,China)Received9November2010；revised10January201iAbstract：Alanthanumglutamicdithiocarbamate(La-GDTClwassynthesized．Thevulcanizationkineticandcrosslinkingstructureofstyrenebutadienerobber(SBR)／La-GDTC／silic“Si02)compositeswerestudiedviavulcanizationkineticsimulation,swellingequilibriumanddif-ferentialscanningcalorimeter．SimulatedcuringparametersshowedthatthecuringrateboftheSB鼬，La43【)1℃／Si02compositewassignifi．eantlyhigherthanthatoftheSB鼬，La-GDTCcomposite．Also．swellingequilibriumtesttumedoutthatcrosslinkingdensityofSBR／I，a．GDTC／SiO，compositeevolvedtohigherlevel，comparedtothatoftheSBI江a．GDTCcomposite．Ammoinamodifiedswellingequilibriuminterpretedb