生活中常见塑料 some polymer plastics for daily life

SomepolymerplasticsWhatisplastic?Whatisplastic?•Plasticisatypeofsyntheticpolymer,usuallyincludingresinandadditive.Whatisplastic?ApartofplasticcarbonatomhydrogenatomlargeandcomplexstuctureAttention!•Polymerisveryimportantmaterialsinourdailylife•Yourmustbecarefulwhenyourusethisplastics:PET,PVC,PC。•Whentheywereunderoneofthisconditions:heatingover65℃,leavingunusedtoolongorbeingexposedtothesunshine,thedangerousmatterswillbereleasedbythisplastic.•WhenthePETunderoneofthisconditions,itsbackbonewillbrokeintopieces,theDEHPwillbereleased.•WhenthePVCunderoneofthisconditions,theDEHP(邻苯二甲酸二己酯•)willbereleased.ThischemicaldonotcomefromthePVCitself,butitsplasticizer.•WhenthePCunderoneofthisconditions,theBPA(双酚A)willbereleasedinevitably.BPADEHPandBPA•DEHPandBPAhavethesimilareffecttoourbody.•First,DEHPandBPAwilldisturbmen’ssecretionofhormones.Itwillmakeboysfeminize,andleadmentosuffertheED.•Second,theyarealsobereportedtocausethecancer.•So,weshouldpreventourselvesfromthem.PETPET（polyethyleneterephthalate）Application：Clearsoftdrinkandbeveragebottles,foodpackaging.CH2OC*O*nH2CCOOrecycle1timesrepeatingunitPETbottlesmineralwatersoftdrinkpurewaterDon’theatandfillhotwaterinthisbottlesPETbottlesPVC•PVC（polyvinylchloride，聚氯乙烯）•Application：•Pipe,plasticbags,section*H2CHC*nClU-PVCorPVC-UU-PVCsectionU-PVCpipePVC•softpipeliferingU-PVCandPVC•What’sdifferent?•TheU-PVCisunplasticizedpolyvinylchloride.•ThePVCoftenincludeplasticizertheDEHPorsimilarchemical•TheU-PVCisusualhard,thePVCcanbeverysoft.PVCThePVCbagsmustincludeplasticizerDon’tusethistypeofplasticbagstopackourfoodsdirectly,especiallythehotandoilyfoods.PC•PC（Polycarbonate,聚碳酸酯）•Application：•Spacecups,PCglass,thinfilm,engineeringplasticsCCH3CH3OC*O*nPCIt’smybottle,thesignonthebottomisnotshowusthematerialcanrecycle7timestoproducethesimilarbottle.Butotherthings.AllFoodgradematerialshouldusethenewpolymer.Don’tfillhotwaterinthisbottlessafeplasticIsthereasafeplastic？PE•PE(Polyethylene，聚乙烯)•Thisisthesimplestpolymer,andthemostwidelyusedplasticwithouttoxic.Whatmostimportantitusuallycanbeusedwithoutadditive.•Application：•Plasticbag,clingfilm,sheets,bottle,andsoon*H2CH2C*2high-densitypolyethylenelow-densitypolyethylenePEplasticbagclingfilmbottlePEThiscanberecycledtwotimesPP•PP(Polypropylene,聚丙烯)•Intheory，PPalsoisasafeplastic.•Butusually,manyadditivebemixedintoit,togetagoodproperty.*H2CHC*nCH3，PPcupsPlasticpotPleasedoremember!•Don’tfillhotwaterintothePETorPCbottle.Pleasedoremember!•Don’tusethePVCbagstopackourfoodsdirectly,especiallythehotandoilyfoods.Thanks