含鉛防輻射有機玻璃板材的研制與性能研究.pdf

1、湖北大學碩士學位論文含鉛防輻射有機玻璃板材的研制與性能研究姓名：李海峰申請學位級別：碩士專業(yè)：高分子化學與物理指導教師：蔣濤20090501ABSTRACTWiththerapiddevelopmentofindustrysomefields，likedailylifeandmedicalandhealth，needmoreandmoreradiationprotectivepaints，especiallythetransparent

2、radiationprotectivepaintsTraditionalradiationprotectivematerialsmainlycontainleadplatesandleadglassLeadplateswereusedintheralativesmallfieldsbecauseofbeingheavyandopaqueThepoormechanicalpropertiesandthehighCOStmadeinorga

3、nicleadglasscouldnotbeusedwidely，thoughitistransparentHowever，leadofleadcontainingpolymethymethacrycouldovercomethesedifficultiesFirstLeadoxideyellowreactedwithQ—methylacrylicacidandn—octylicacidtoformtheunsaturatedleadm

4、ethylacrylateandthesaturatedleadoctoate，NextunsaturatedleadmethylacrylateandMMAreactedtoformacopolymerLead—PMMAandleadoctoateleadoctoateactedasadditionagentIntheexperiments，thebestprocessconditionswerestudiedtoformleadsa

5、ltandthephysicalpropertiesoftheleadsaltweretestedLeadmethylacrylatewasprovedtobeakindofionicCOmpoundbyFTIRAtthesametime，itwasfoundthatleadoctoatewasessentialintheformulabytheprocessofstudyingtheconditionstoformtransparen

6、tplatesThenthesystemofformulatoformtransparentplateswasmadeupofmethymethacrylate，LeadmethylacrylateandleadoctoateItwasfoundthattheshockresistanceoftheplatescouldbeincreasedbutthevicatsofteningpointoftheplatescouldbedecre

7、asedbystudyinghowBMAinfluentedthepropertiesoftheplatesWiththeadditionofstyrene，thewhitenessoftheplatescouldimprovegreatlywhiletheotherpropertiescouldhardlychangeItwasfoundthatglass—transitiontemperature(Tg)didn’tchangeto

8、wardthesamedirectionallthetimeacCOmpaniedbythechangeoftheamountoflead，becausethetwokindsoftheleadsaltsexertedanoppositeinfluenceonglass—transitiontemperaturebystudyingtheinfluencebetweenthetwokindsoftheleadsaltsandglasst

9、ransitiontemperatureThedecompositiontemperatureofcopolymer—LeadPMMAchangedfrom350。Cto450。CTheleadequivalentoftheleadplatesofwhichthe30percentwasleadwas034mmPbKeywords：polymethylmethacrylate；radiationprotection；copolymeri