Iindlela zePolyethylene Synthesis kunye neentlobo ezahlukeneyo
(1) IPolyethylene yoXinano oluPhantsi (I-LDPE)
Xa umkhondo wezixa zeoksijini okanye iiperoxide zongezwa njengeziqalisi kwi-ethylene esulungekileyo, icinezelwe ukuya kutsho malunga ne-202.6 kPa, kwaye ifudunyezwe ukuya kuma-200°C, i-ethylene ipholima ibe mhlophe, ipolyethylene ene-waxy. Le ndlela ngokuqhelekileyo ibizwa ngokuba yinkqubo yoxinzelelo oluphezulu ngenxa yeemeko zokusebenza. I-polyethylene ebangelwayo inobuninzi be-0.915-0.930 g/cm³ kunye nobunzima bemolekyuli ukusuka kwi-15,000 ukuya kwi-40,000. Isakhiwo sayo se-molecular sinamagatsha amaninzi kwaye sikhululekile, sifana nokucwangciswa "okufana nomthi", obangela ubuninzi bayo obuphantsi, ngoko ke igama le-polyethylene ephantsi.
(2) IPolyethylene yoXinano oluPhakathi (I-MDPE)
Inkqubo yoxinzelelo oluphakathi ibandakanya i-polymerizing ethylene phantsi kwe-30-100 atmospheres usebenzisa i-metal oxide catalysts. I-polyethylene ebangelwayo inobuninzi be-0.931-0.940 g/cm³. I-MDPE inokuveliswa ngokuxuba i-polyethylene ephezulu (i-HDPE) kunye ne-LDPE okanye nge-copolymerization ye-ethylene kunye ne-comonomers ezifana ne-butene, i-vinyl acetate, okanye i-acrylates.
(3) I-Polyethylene yoXinano oluPhezulu (HDPE)
Ngaphantsi kweqondo lokushisa eliqhelekileyo kunye neemeko zoxinzelelo, i-ethylene i-polymerized isebenzisa i-catalysts yokulungelelanisa kakhulu (i-organometallic compounds eyenziwe nge-alkylaluminum kunye ne-titanium tetrachloride). Ngenxa yomsebenzi ophezulu we-catalytic, i-polymerization reaction inokugqitywa ngokukhawuleza kwiingcinezelo eziphantsi (0-10 atm) kunye namaqondo okushisa aphantsi (60-75 ° C), ngoko ke igama lenkqubo yoxinzelelo oluphantsi. I-polyethylene ebangelwayo ine-unbranched, i-linear ye-molecular structure, igalelo ekuxineni kwayo okuphezulu (0.941-0.965 g / cm³). Xa kuthelekiswa ne-LDPE, i-HDPE ibonisa ukuxhathisa ubushushu obuphezulu, iipropathi zoomatshini, kunye nokumelana noxinzelelo lokusingqongileyo.
Iipropati zePolyethylene
I-Polyethylene lubisi-mhlophe, i-wax-njengeplastiki, i-semi-transparent, iyenza ibe yinto efanelekileyo yokugquma kunye nempahla yokushelela iingcingo kunye neentambo. Iinzuzo zayo eziphambili ziquka:
(1) Iimpawu zombane ezigqwesileyo: ukuxhathisa okuphezulu kwe-insulation kunye namandla e-dielectric; imvume ephantsi (ε) kunye ne-dielectric loss tanjent (tanδ) kuluhlu olubanzi lwamaza, ngokuxhomekeka okuncinci kwamaza, iyenza iphantse ibe yi-dielectric efanelekileyo kwiintambo zonxibelelwano.
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(4) Ukuchasana kwamanzi okugqwesileyo kunye nokufunxa okuphantsi komswakama; Ukumelana nokufakwa kwe-insulation ngokuqhelekileyo akunciphi xa kuntywiliselwa emanzini.
(5) Njengesixhobo esingeyiyo i-polar, ibonisa ukugqithiswa kwegesi ephezulu, kunye ne-LDPE enegesi ephezulu yokungena phakathi kweeplastiki.
(6) Umxhuzulane okhethekileyo osezantsi, zonke zingaphantsi kwe-1. I-LDPE iphawuleka ngakumbi malunga ne-0.92 g/cm³, ngelixa i-HDPE, nangona ingxinano yayo ephezulu, ijikeleze kuphela i-0.94 g/cm³.
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(8) Iintambo ezenziwe ngepolyethylene zikhaphukhaphu, kulula ukuzifaka, kwaye kulula ukuziphelisa. Nangona kunjalo, i-polyethylene nayo inezithintelo ezininzi: ubushushu obuphantsi bokuthambisa; ukutsha, ukukhupha ivumba elifana neparafini xa utshisiwe; ukunganyangeki koxinzelelo lokusingqongileyo kunye nokuxhathisa ukunyathela. Ingqwalasela eyodwa iyafuneka xa usebenzisa i-polyethylene njengento yokugquma okanye i-sheathing kwiintambo zangaphantsi kwamanzi okanye iintambo ezifakwe kumathontsi athe nkqo.
IiPlastiki zePolyethylene zeeNcingo kunye neeCables
(1) IPlastiki yePlastiki yePolyethylene yeNjongo Jikelele
Yenziwe kuphela i-polyethylene resin kunye ne-antioxidants.
(2) IPlastiki yePolyethylene enganyangekiyo kwiMozulu
Ngokuyintloko yenziwe nge-polyethylene resin, i-antioxidants, kunye nekhabhoni emnyama. Ukumelana nemozulu kuxhomekeke kubungakanani besuntswana, umxholo, kunye nokusasazwa kwekhabhoni emnyama.
(3) IPlastiki yePlasitiki yokuNxinzelela kokuSingqongileyo-I-Crack Resistant
Isebenzisa i-polyethylene nge-melt flow index ngaphantsi kwe-0.3 kunye nokusabalalisa ubunzima be-molecular. I-polyethylene inokuthi idityaniswe ngokusebenzisa i-irradiation okanye iindlela zekhemikhali.
(4) I-Polyethylene yePlastiki ye-High-Voltage Insulation
Ukufakwa kwentambo ye-voltage ephezulu kufuna iplastiki ye-polyethylene ye-ultra-pure, eyongezwa nge-voltage stabilizers kunye nee-extruders ezikhethekileyo ukukhusela ukwakheka kwe-void, ukucinezela ukukhutshwa kwe-resin, kunye nokuphucula ukuxhathisa kwe-arc, ukuxhathisa ukukhukuliseka kombane, kunye nokumelana ne-corona.
(5) I-Semiconductive Polyethylene Plastic
Iveliswe ngokongeza i-carbon conductive emnyama kwi-polyethylene, ngokuqhelekileyo isebenzisa i-fine-particle, i-high-structure carbon black.
(6) I-Thermoplastic-Low-Msi ePhantsi iZero-Halogen (LSZH) iNdibaniselwano yeCable yePolyolefin
Le khompawundi isebenzisa i-polyethylene resin njengesiseko semathiriyeli, ebandakanya i-halogen-free retardants ye-flame, i-suppressants yomsi, i-thermal stabilizers, i-antifungal agents, kunye ne-colorants, zicutshungulwa ngokuxuba, iplastiki kunye ne-pelletization.
I-Crosslinked Polyethylene (XLPE)
Ngaphantsi kwesenzo se-radiation ene-energy high-energy okanye i-crosslinking agents, isakhiwo se-molecular linear ye-polyethylene siguqulela kwisakhiwo se-three-dimensional (network), ukuguqula izinto ze-thermoplastic zibe yi-thermoset. Xa isetyenziswa njenge-insulation,XLPEiyakwazi ukumelana namaqondo obushushu obusebenzayo ukuya kutsho kuma-90°C kunye namaqondo obushushu obufutshane obuyi-170–250°C. Iindlela zokuphambana zibandakanya ukuphambana komzimba kunye neekhemikhali. I-Irradiation crosslinking yindlela yomzimba, ngelixa i-agent ye-chemical crosslinking eqhelekileyo i-DCP (i-dicuyl peroxide).
Ixesha lokuposa: Apr-10-2025