06A Novel Polymethyl Methacrylate （PMMA）TiO2 Nanocomposite and Its Thermal and Photic Stability.pdf

《06A Novel Polymethyl Methacrylate （PMMA）TiO2 Nanocomposite and Its Thermal and Photic Stability.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、维普资讯http://www.cqvip.comWUJNSVoI．11No．22006415．418WuhanUniversityJournalofNaturalSciencesArticleID：10071202(2006)020415O4ANovelPolymethylMethacrylate(PMMA)-TiO2NanocompositeandItsThermalandPhoticStability0IntrOdUCtiOn口ZANLing，LIUZhongshi，FAWenjun，PENGTianY0u，CollegeofChemistryandMolecula

2、rSciences，WuhanPomlyomplaetshtiyclmmaettehraiac'r1．ylIatteis(PwMidMelyAu)siesdaansimapsohreteatngtltahzeinrg—University。Wuhan430072，Hubei，Chinamateria1．opticallensesandfluorescentsolarcollectionsbe—causeofitsoptica1clarity．However，thestabilityofPMMAAbstract：AnewkindofDolymethylmethacryla

3、te(PM—underUV-irradiationisPoor，whichresultsinthedecreaseofMA)一TiOznanocompositewassynthesizedthroughpolymeri—PMMAtransparencyundersunlightirradiation．Thethermalzation．FhethermaIandphoticstabilityofthisPMMA_T，nanocompositeswereinvestigated．TheaspreparedsamplesstabilityofPMMAisnotverywell

4、。itisusuallyusedunderwerecharacterizedbyscanningelectronmicroscopy(SEM)。8O℃【』．Ifthetemperatureisabove8O。C，PMMAwillbe—UV_Visspectroscopy，differentialthermalanalysis(DTA)andthephoto-inducedweight1OSS．Theresultsshowthatthecometenderandmetamorphose．RutileTiO2isexcellentinphotostabilityoftheP

5、MMA—Ti()，nanocompositeishighershieldingultraviolet_2_l{]．IthasbeenusedinpolymericpigthanthatofthepurePMMAunderUV-lightirradiation．Thementtoimproveitsphoticstability[wJweighl—lossofthepurePMMAreaches30after300hUV-．Toauthorsbestirradiation。whilethecompositeonly0．3undertheknowledge，therehas

6、notbeenanyresearchgroupreportedidentica1experimenta1condition．Theglasstransitiontemper—thePMMA—TiO2nanocompositeanditsthermalandphoticature(，)ofpurePMMAisonly8OC，whilethe了ofthestabilityyet．compositereaches258C．ComparedwithpurePMMA，thethermalstabilityofthecompositeisgreatlyenhanced．Itiswe

7、llknownthatTi02particlewillaggregatebadlyinKeywords：polymethylmethacrylate(PMMA)TiO2thelowpolaritymedium，ifthereisnoenoughsterichin—nanoeomposite；polymerization；thermalandphoticstabilitydrance['．TheTi02nanoparticlesinpolymerusuallyincorCLCnumber：()643porateintothepolymerm