Polypropylene (PP) ke thermoplastic e thata ea kristale e sebelisoang linthong tsa letsatsi le letsatsi.Ho na le mefuta e fapaneng ea PP e fumanehang: homopolymer, copolymer, impact, joalo-joalo. Mehato ea eona ea mochini, ea 'mele, le ea lik'hemik'hale e sebetsa hantle lits'ebetsong ho tloha ho likoloi le tsa bongaka ho ea ho liphutheloana.
Polypropylene ke eng?
Polypropylene e hlahisoa ho tloha propene (kapa propylene) monomer.Ke resin ea hydrocarbon e melang.Mokhoa oa lik'hemik'hale oa polypropylene ke (C3H6)n.PP ke e 'ngoe ea lipolasetiki tse theko e tlaase tse fumanehang kajeno,' me E na le letsoalo le tlase haholo har'a lipolasetiki tsa thepa.Ka holim'a polymerization, PP e ka theha meaho e meraro ea mantlha ho latela maemo a lihlopha tsa methyl:
Atactic (APP).Tlhophiso e sa tloaelehang ea sehlopha sa methyl (CH3).
Isotactic (iPP).Lihlopha tsa Methyl (CH3) li hlophisitsoe ka lehlakoreng le leng la ketane ea carbon
Syndiotactic (sPP).Tokiso ea sehlopha sa methyl (CH3).
PP ke ea lelapa la polyolefin la li-polymers 'me ke e' ngoe ea tse tharo tse holimo tse sebelisoang haholo kajeno.Polypropylene e na le lits'ebetso - joalo ka polasetiki hape joalo ka fiber - indastering ea likoloi, lits'ebetso tsa indasteri, thepa ea bareki le 'maraka oa thepa ea ka tlung.
Mefuta e fapaneng ea polypropylene
Homopolymers le copolymers ke mefuta e 'meli ea mantlha ea polypropylene e fumanehang 'marakeng.
Propylene homopolymerke mophato o sebelisoang haholo ka kakaretso.E na le propylene monomer feela ka mokhoa o tiileng oa semi-crystalline.Lisebelisoa tsa mantlha li kenyelletsa ho paka, masela, tlhokomelo ea bophelo bo botle, lipeipi, likoloi, le lisebelisoa tsa motlakase.
Polypropylene copolymere arotsoe ka li-copolymers tse sa reroang le li-block copolymers tse hlahisoang ke polymerizing ea propene le ethane:
1. Propylene random copolymer e hlahisoa ka polymerizing hammoho ethene le propene.E na le li-unit tsa ethene, hangata ho fihla ho 6% ka boima, tse kenyelletsoeng ka mokhoa o sa reroang ka liketane tsa polypropylene.Li-polymer tsena lia tenyetseha ebile lia hlaka, li etsa hore li tšoanelehe bakeng sa lits'ebetso tse hlokang pepenene le lihlahisoa tse hlokang ponahalo e ntle haholo.
2. Propylene block copolymer e na le litaba tse phahameng tsa ethene (pakeng tsa 5 le 15%).E na le li-unit tsa co-monomer tse hlophisitsoeng ka mokhoa o tloaelehileng (kapa li-blocks).Mokhoa o tloaelehileng o etsa hore thermoplastic e be thata le hore e se ke ea robeha ho feta co-polymer e sa sebetseng.Li-polymer tsena li loketse lits'ebetso tse hlokang matla a holimo, joalo ka ts'ebeliso ea indasteri.
Mofuta o mong oa polypropylene ke impact copolymer.Propylene homopolymer e nang le co-mixed propylene random copolymer phase e nang le ethylene content ea 45-65% e bitsoa PP impact copolymer.Li-copolymer tsa Impact li sebelisoa haholo ho paka, lisebelisoa tsa ntlo, lifilimi le lipeipi, hammoho le likarolo tsa likoloi le tsa motlakase.
Polypropylene Homopolymer vs. Polypropylene Copolymer
Propylene homopolymere na le karo-karolelano e phahameng ea matla ho boima, 'me e thata ebile e matla ho feta copolymer.Lintho tsena tse kopantsoeng le lik'hemik'hale tse ntle tsa lik'hemik'hale le ho cheseha li etsa hore e be thepa ea khetho meahong e mengata e hanyetsanang le kutu.
Polypropylene copolymere bonolo empa e na le tšusumetso e matla.E thata ebile e tšoarella ho feta propylene homopolymer.E na le ho ba le khatello e ntle ea khatello ea maikutlo le ho tiea ha mocheso o tlase ho feta homopolymer ka litšenyehelo tsa phokotso e nyane ea thepa e 'ngoe.
Likopo tsa PP Homopolymer le PP Copolymer
Lisebelisoa li batla li tšoana ka lebaka la thepa ea tsona e arolelanoang haholo.Ka lebaka leo, khetho pakeng tsa lisebelisoa tsena tse peli hangata e etsoa ho latela mekhoa e seng ea theknoloji.
Ho boloka tlhahisoleseling mabapi le thepa ea thermoplastic esale pele ho molemo kamehla.Sena se thusa ho khetha thermoplastic e nepahetseng bakeng sa ts'ebeliso.E boetse e thusa ho lekola hore na tlhokahalo ea ho qetela e tla phethahala kapa che.Mona ke lintlha tse ling tsa bohlokoa le melemo ea polypropylene:
Sebaka se qhibilihang sa polypropylene.Sebaka se qhibilihang sa polypropylene se etsahala ka mefuta e mengata.
● Homopolymer: 160-165°C
● Copolymer: 135-159°C
Boima ba polypropylene.PP ke e 'ngoe ea li-polymer tse bobebe ho fetisisa har'a lipolasetiki tsohle tsa thepa.Karolo ena e etsa hore e be khetho e loketseng bakeng sa lisebelisoa tse bobebe / boima--ho boloka.
● Homopolymer: 0.904-0.908 g/cm3
● Copolymer e sa reroang: 0.904-0.908 g/cm3
● Tšusumetso ea copolymer: 0.898-0.900 g/cm3
Polypropylene lik'hemik'hale tse hanyetsanang
● Ho hanyetsa ka mokhoa o babatsehang ho li-acid tse hlapollotsoeng le tse teteaneng, joala le li-bases
● Ho khona ho mamella aldehyde, ester, aliphatic hydrocarbon le ketone
● Ho hanyetsa ho lekanyelitsoe ho li-hydrocarbon tse nkhang hamonate le halogenated le li-oxidizing agents
Litekanyetso tse ling
● PP e boloka thepa ea mochini le ea motlakase mochesong o phahameng, maemong a mongobo, le ha e qoelisoa ka metsing.Ke polasetiki e thibelang metsi
● PP e na le khanyetso e ntle ea khatello ea tikoloho le ho senya
● E khona ho mamella litlhaselo tsa likokoana-hloko (libaktheria, hlobo, joalo-joalo)
● E bontša khanyetso e ntle ho sterilization ea mouoane
Li-additives tsa polymer joalo ka li-clarfiers, li-retardants tsa lelakabe, likhoele tsa khalase, liminerale, li-filler, litlolo, li-pigments le lisebelisoa tse ling tse ngata li ka ntlafatsa boleng ba 'mele le/kapa mochini oa PP.Ka mohlala, PP e na le khanyetso e fokolang khahlanong le UV, ka hona ho tsitsisa ha leseli ka li-amine tse thibetsoeng ho ntlafatsa bophelo ba tšebeletso ha ho bapisoa le polypropylene e sa fetoloang.
Mathata a Polypropylene
Khanyetso e mpe ho UV, tšusumetso, le mengoapo
Embrittles ka tlase ho −20°C
Mocheso o tlase oa ts'ebeletso e kaholimo, 90-120°C
E hlasetsoe ke li-acid tse ngata tse nang le oxidizing, e ruruha ka potlako ka har'a metsoako ea chlorinated le aromatics
Ho tsitsisa ha botsofali ba mocheso ho ameha hampe ka ho kopana le litšepe
Liphetoho tsa maemo a morao-rao ka lebaka la litlamorao tsa crystallinity
Ho khomarela pente e fokolang
Lisebelisoa tsa polypropylene
Polypropylene e sebelisoa haholo lits'ebetsong tse fapaneng ka lebaka la ho hanyetsa lik'hemik'hale tse ntle le ho cheseha ha eona.Lisebelisoa tse ling tse tloaelehileng tsa polypropylene li kenyelletsa:
Lisebelisoa tsa ho paka
Thepa e ntle ea litšitiso, matla a phahameng, pheletso e ntle ea bokaholimo, le litšenyehelo tse tlase li etsa hore polypropylene e be e loketseng lits'ebetso tse 'maloa tsa ho paka.
Sephutheloana se feto-fetohang.Lifilimi tsa PP tse hlakileng haholo le phetiso ea mouoane o tlase oa mongobo li etsa hore e tšoanelehe ho sebelisoa ho paka lijo.Limmaraka tse ling li kenyelletsa ho nyenyefala ha lifilimi, lifilimi tsa indasteri ea elektroniki, lits'ebetso tsa bonono ba litšoantšo, le li-tabs tse lahlehang le ho koaloa.Filimi ea PP e fumaneha e le filimi ea cast kapa bi-axially orientated PP (BOPP).
Pakete e thata.PP e bōptjoa ho hlahisa li-crate, libotlolo le lipitsa.Lijana tsa PP tse nang le marako a masesaane li sebelisoa hangata bakeng sa ho paka lijo.
Thepa ea bareki.Polypropylene e sebelisoa lihlahisoa tse 'maloa tsa ntlo le lits'ebetso tsa thepa ea bareki, ho kenyeletsoa likarolo tse feto-fetohang, lisebelisoa tsa ntlo, thepa ea ka tlung, lisebelisoa, thōtō le lintho tsa ho bapala.
Lisebelisoa tsa likoloi.Ka lebaka la theko e tlase, thepa e ikhethang ea mochini, le ho bōptjoa, polypropylene e sebelisoa haholo likarolong tsa likoloi.Lisebelisoa tsa mantlha li kenyelletsa lik'hasete tsa betri le literei, li-bumpers, li-fender liner, trim ea ka hare, li-instrumental panels, le lithapo tsa mamati.Likarolo tse ling tsa bohlokoa tsa lits'ebetso tsa likoloi tsa PP li kenyelletsa coefficient e tlase ea katoloso ea mocheso le matla a khoheli a khethehileng, khanyetso e phahameng ea lik'hemik'hale le boemo ba leholimo bo botle, ts'ebetso, le ho leka-lekana ha tšusumetso / ho tiea.
Likhoele le masela.Palo e kholo ea PP e sebelisoa karolong ea 'maraka e tsejoang ka hore ke likhoele le masela.Fila ea PP e sebelisoa lits'ebetsong tse ngata, ho kenyeletsoa raffia/slit-filimi, theipi, likhoele, likhoele tse ngata tse tsoelang pele, likhoele tse tloaelehileng, bond e ohiloeng, le likhoele tse tsoelang pele.Thapo ea PP le twine li matla haholo ebile ha li na mongobo, li loketse haholo lits'ebetsong tsa metsing.
Likopo tsa bongaka.Polypropylene e sebelisoa lits'ebetsong tse fapaneng tsa bongaka ka lebaka la khanyetso e phahameng ea lik'hemik'hale le baktheria.Hape, boemo ba bongaka ba PP bo bonts'a khanyetso e ntle ea sterilization ea mouoane.
Li-syringe tse lahliloeng ke tšebeliso e atileng haholo ea bongaka ea polypropylene.Lisebelisoa tse ling li kenyelletsa linkho tsa bongaka, lisebelisoa tsa tlhahlobo, lijana tsa petri, libotlolo tse tšeloa methapong, libotlolo tsa mohlala, literei tsa lijo, lipane le lijana tsa lipilisi.
Lisebelisoa tsa indasteri.Lipampiri tsa polypropylene li sebelisoa haholo lefapheng la indasteri ho hlahisa litanka tsa acid le lik'hemik'hale, maqephe, liphaephe, Returnable Transport Packaging (RTP), le lihlahisoa tse ling ka lebaka la thepa ea eona e kang matla a phahameng a matla, ho hanyetsa mocheso o phahameng le ho hanyetsa kutu.
PP e ka sebelisoa hape ka 100%.Mabone a betri ea koloi, mabone a matšoao, likhoele tsa betri, mafielo, borashe le li-ice scrapers ke mehlala e seng mekae ea lihlahisoa tse ka etsoang ho tsoa ho polypropylene (rPP).
Ts'ebetso ea PP haholo-holo e kenyelletsa ho qhibiliha ha polasetiki ea litšila ho isa ho 250 ° C ho tlosa litšila tse lateloang ke ho tlosoa ha limolek'hule tse setseng tlas'a vacuum le ho tiisa hoo e ka bang 140 ° C.PP ena e tsosolositsoeng e ka kopanngoa le moroetsana PP ka tekanyo e fihlang ho 50%.Phephetso e kholo ho PP recycling e amana le palo ea eona e sebelisitsoeng - hajoale hoo e ka bang 1% ea libotlolo tsa PP li sebelisoa hape, ha li bapisoa le sekhahla sa 98% sa PET & HDPE hammoho.
Tšebeliso ea PP e nkoa e sireletsehile hobane ha e na phello leha e le efe e tsotehang ho latela pono ea bophelo bo botle le polokeho ea mosebetsing, ho latela chefo ea lik'hemik'hale.Ho ithuta haholoanyane ka PP sheba tataiso ea rona, e kenyelletsang tlhahisoleseling le tse ling.
Nako ea poso: Jul-03-2023