Qhov sib txawv tseem ceeb ntawm polypropylene thiab yas yog cov khoom siv lead ua ntshiab tuaj yeem tsim los ntawm polypropylene, thaum cov khoom yas feem ntau tsis meej.
Yog tias peb yuav siv lub hnab ntim khoom, peb nyiam siv cov khoom ntim rau kev txiav txim siab txog cov khoom ntawm cov khoom. Yog tias peb xav nthuav tawm cov khoom lag luam, peb xav tau lub hnab ntim khoom kom pom tseeb. Cov hnab yas tsis yog qhov kev xaiv zoo rau qhov no vim lawv tsis meej. Txawm li cas los xij, polypropylene yog ib qho kev xaiv zoo tshaj plaws rau lub hom phiaj no.
YPolypropylene yog dab tsi?
Polypropylene yog cov yas polymer. Lub monomer ntawm polypropylene yog propylene; nws muaj peb carbons thiab ib ob daim ntawv cog lus ntawm ob ntawm cov carbon atoms. Peb tuaj yeem tsim cov khoom siv no los ntawm cov pa roj propylene nyob rau hauv muaj cov catalyst xws li titanium chloride. Tsis tas li ntawd, kev tsim cov khoom siv no yooj yim, thiab nws muab lub siab purity.
Daim duab 01: Pob tshab, Cov Khoom Siv Polypropylene
Polypropylene cov khoom tseem ceeb yog raws li hauv qab no.
- pob tshab
- siab tiv thaiv tawg, acids, organic solvents, electrolytes
- High melting point
- Non-toxic
- muaj cov khoom zoo dielectric
- Tus nqi nyiaj txiag siab.
Nyob zoo ib tsoom phooj ywg sawv daws
Yog li, cov khoom siv no muaj txiaj ntsig zoo rau kev tsim cov kav dej, ntim khoom, khoom siv hauv tsev, ntim khoom, thiab cov khoom siv tsheb.
YPlastic yog dab tsi?
Yas yog ib qho polymer uas muaj qhov loj me me. Cov monomers ntawm cov yas yog ntuj lossis hluavtaws. Kev tsim cov yas feem ntau yog los ntawm petrochemicals. Yog li ntawd, nws yog ib tug hluavtaws polymer. Ob hom yas loj yog thermoplastics thiab thermosetting polymers. Thermoplastics ua mos thaum peb sov nws, thiab yog tias peb txias nws, nws solidifies dua. Yog li ntawd, nrog cov cua kub thiab txias tas mus li, peb tuaj yeem hloov cov duab yam tsis muaj teeb meem (xws li polypropylene, polyethylene, PVC, polystyrene).
Daim duab 02: Tsawg Transparency ntawm Yas (ib lub tais yas)
Txawm li cas los xij, yog tias peb ua kom sov thiab txias thermosetting polymers, nws yuav tawv mus tas li. Thaum peb sov nws, nws tuaj yeem ua pwm, tab sis yog tias rhaub dua, nws yuav decompose (piv txwv li, Bakelite, uas yog siv los ua cov lauj kaub thiab lauj kaub).
Plastics muaj txiaj ntsig zoo hauv ntau hom; Piv txwv li, lub raj mis, hnab, thawv, fibers, films, thiab lwm yam. Lawv yog cov resistant rau tshuaj thiab yog thermal thiab hluav taws xob insulators. Cov yas sib txawv muaj qhov sib txawv, tab sis lawv feem ntau muaj lub teeb yuag. Peb tuaj yeem tsim cov khoom no los ntawm kev sib xyaw ua ke thiab ntxiv cov tshuaj tiv thaiv. Tsis tas li ntawd, nws muaj peev xwm ua crosslink ntawm cov saw hlau polymer hauv cov txheej txheem synthesizing. Piv txwv li, peb tuaj yeem tsim polyethylene los ntawm kev ntxiv cov tshuaj tiv thaiv ntawm monomer ethylene. Ntxiv mus, nws qhov rov ua dua yog -CH2-
Txawm li cas los xij, nyob ntawm txoj kev nws dhau los ua polymerization, cov khoom ntawm cov khoom sib txuas ntawm polyethylene hloov. Piv txwv li, PVC los yog polyvinyl chloride zoo ib yam li polyethylene, nrog ib tug monomer ntawm CH2=CH2Cl, tab sis qhov txawv yog PVC. muaj chlorine atoms. Tsis tas li ntawd, PVC yog nruj thiab muaj txiaj ntsig hauv kev tsim cov kav dej.
Qhov txawv ntawm Polypropylene thiab yas yog dab tsi?
Yas yog ib qho polymer uas muaj qhov loj me me. Polypropylene yog ib qho piv txwv ntawm cov yas polymer. Qhov sib txawv tseem ceeb ntawm polypropylene thiab yas yog tias peb tuaj yeem tsim cov khoom siv lead ua ntshiab los ntawm polypropylene, thaum cov khoom siv yas feem ntau tsis meej. Ntxiv mus, peb tuaj yeem tsim cov polypropylene los ntawm cov roj propylene nyob rau hauv muaj cov catalyst xws li titanium chloride, tab sis peb tsim cov yas los ntawm petrochemicals.
Tsis tas li ntawd, muaj qee qhov sib txawv ntawm polypropylene thiab yas hauv lawv cov khoom. Cov khoom tseem ceeb ntawm polypropylene muaj xws li lub teeb yuag, tsis muaj toxicity, siab melting point, thiab lwm yam thaum lub zog ntawm cov yas muaj xws li corrosion kuj, thermal thiab hluav taws xob conductivity, xim, tsis tshua muaj nqi, thiab lwm yam.
Summary – Polypropylene vs Yas
Yas yog ib qho polymer uas muaj cov molecular loj. Polypropylene yog ib qho piv txwv ntawm cov yas polymer. Qhov sib txawv tseem ceeb ntawm polypropylene thiab yas yog tias peb tuaj yeem tsim cov khoom siv crystal ntshiab los ntawm polypropylene, thaum cov khoom siv yas feem ntau tsis meej.
Image Courtesy:
1. "PolypropyleneItemsForLaboratoryUse" Los ntawm DED Biotechnology - Tus kheej ua haujlwm (CC BY-SA 4.0) ntawm Commons Wikimedia
2. Los ntawm Rodolph ntawm English Wikipedia (CC BY-SA 3.0) ntawm Commons Wikimedia
