Tham nrog koj txog cov khoom tseem ceeb thiab kev siv ntawm polypropylene (PP).
Ua ntej tshaj plaws, polypropylene yog dab tsi?Polypropylene yog abbreviated li "PP".Nws yog cov thermoplastic cob nrog kev teeb tsa tsis tu ncua thiab siabELECTRIC THERMAL ACTUATOR(crystallinity siab li 95%) polymerized los ntawm propylene.Nws tuaj yeem muab faib ua PP txhaj molding, PP hlau kos duab, PP fiber, PP zaj duab xis, PP yeeb nkab.Ntawm cov yas uas feem ntau siv hauv lub neej, polypropylene yog ib qho ntawm ntau yam sib txawv.
Hauv qab no yog cov khoom ntawm polypropylene:
1. Lub cev muaj zog: tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis qab, milky dawb thiab siab crystalline ceev tsuas yog 0.9-0.91g / cm3, zoo stability rau dej.
2. Kev ua haujlwm thermal: Nws muaj cov cua kub zoo, thiab nws cov khoom tuaj yeem ua kom tsis muaj menyuam ntawm qhov kub siab tshaj 100 ° C, thiab yuav tsis deform ntawm 150 ° C yam tsis muaj kev quab yuam sab nraud.Lub embrittlement kub yog -35 ° C, thiab embrittlement tshwm sim hauv qab -35 ° C, thiab qhov txias kuj tsis zoo li polyethylene.
3. Chemical stability: Cov tshuaj stability zoo heev.Ntxiv rau qhov raug corroded los ntawm concentrated sulfuric acid thiab concentrated nitric acid, nws yog ib qho ruaj khov rau lwm cov tshuaj reagents, tab sis tsis tshua muaj molecular hnyav aliphatic hydrocarbons, muaj ntxhiab hydrocarbons thiab chlorinated hydrocarbons tuaj yeem ua rau cov polymer propylene softens thiab swells, thiab nws cov tshuaj stability nce nrog. qhov nce ntawm crystallinity, yog li polypropylene yog tsim rau kev ua ntau yam tshuaj yeeb nkab thiab fittings, thiab muaj ib tug zoo anti-corrosion nyhuv.
4. Cov khoom siv hluav taws xob: Nws muaj lub siab dielectric coefficient, thiab nrog qhov kub thiab txias, nws tuaj yeem siv los ua cov khoom siv hluav taws xob rwb thaiv tsev.Nws kuj muaj qhov sib zog tawg siab thiab tsim nyog siv los ua cov khoom siv hluav taws xob, thiab lwm yam. Nws muaj kev tiv thaiv zoo rau qhov hluav taws xob thiab arc, tab sis muaj hluav taws xob zoo li qub, thiab nws yooj yim rau hnub nyoog thaum nws nyob rau hauv kev sib cuag nrog tooj liab.
Polypropylene yog siv dav hauv cov khoom siv hauv tsev thiab cov kav dej yas.Cov khoom siv hauv tsev tau tsim sai heev nyob rau xyoo tas los no, nrog ntau yam thiab cov khoom siv loj.Yog li ntawd, nyob rau hauv ob peb xyoos tom ntej no, txoj kev loj hlob ntawm PP cov ntaub ntawv tshwj xeeb rau cov khoom siv hauv tsev yuav raug nce ntxiv kom tau raws li cov kev xav tau ntawm kev ua lag luam.
Nyob rau hauv 2003, lub teb chaws tag nrho cov zis ntawm cov kav dej yas tau tshaj 1.8 lab tons, ib xyoos ib zaug nce ntawm 23%.Thaum ntxov, cov kav dej PP feem ntau yog siv los ua cov kav dej ua liaj ua teb, tab sis kev lag luam tsis qhib vim qee qhov teeb meem ntawm kev ua haujlwm ntawm cov khoom thaum ntxov (kev cuam tshuam lub zog thiab kev laus tsis zoo).Tab sis nrog kev qhia txog kev siv tshuab, kev ua lag luam tau maj mam lees paub.Cov kav dej yas yog ib qho ntawm cov khoom tseem ceeb rau kev txhawb nqa thiab kev siv cov khoom siv tshuaj hauv kuv lub teb chaws.Lub Tsev Haujlwm Saib Xyuas Kev Tsim Kho tau tshaj tawm "Daim Ntawv Ceeb Toom Txog Kev Txhim Kho Kev Tswj Xyuas Kev Tsim Khoom thiab Kev Tshaj Tawm thiab Kev Siv Copolymerized Polypropylene (PP-R, PP-B) Pipes" hauv xyoo 2001, xav kom cov koom haum cuam tshuam ua haujlwm ua haujlwm zoo los ntawm cov khoom siv raw, kev ua haujlwm, zoo rau cov yeeb nkab siv thiab kev teeb tsa, thiab nruj me ntsis tswj qhov zoo ntawm cov kav dej PP, thiaj li ua tau zoo dua ua txoj haujlwm zoo hauv kev tsim, thov thiab txhawb nqa PP kav hauv kuv lub teb chaws.
Nrog rau kev txhim kho ntawm tib neeg kev ua neej nyob, nws yog ib qho kev txhim kho zoo los txhim kho pob tshab PP cov ntaub ntawv tshwj xeeb, tshwj xeeb tshaj yog PP cov ntaub ntawv tshwj xeeb nrog cov pob tshab siab, zoo fluidity, thiab kev sib sau ceev yuav tsum tsim thiab ua rau tib neeg nyiam cov khoom PP.Pob tshab PP yog cov yam ntxwv ntau dua li PP, PVC, PET, PS, thiab muaj qhov zoo dua thiab kev cia siab rau kev loj hlob.Tam sim no, muaj qhov sib txawv loj ntawm cov pob tshab PP cov ntaub ntawv tshwj xeeb thiab cov teb chaws txawv teb chaws, thiab kev tsim thiab siv cov pob tshab PP resin thiab nws cov khoom tseem yuav tsum tau ntxiv dag zog.
Tsis tas li ntawd, polypropylene kuj tseem siv rau hauv stretching PP zaj duab xis thiab lwm yam.
Post lub sij hawm: Sep-24-2022