Qhov txawv ntawm PVC thiab PVDC yog PVC yog ua los ntawm chloroethene monomers, whereas PVDC yog ua los ntawm vinylidene chloride.
PVC thiab PVDC yog cov polymers uas muaj cov qauv zoo sib xws vim cov khoom siv rov ua dua muaj C-C, C-H, thiab C-Cl daim ntawv cog lus. Lawv txawv ntawm ib leeg raws li cov monomer uas yog siv los tsim cov khoom siv polymer. Yog li ntawd, lawv cov chav rov ua dua kuj txawv ntawm ib leeg.
YPVC yog dab tsi?
Lo lus PVC sawv cev rau polyvinyl chloride. PVC yog ib qho thermoplastic polymer ua los ntawm chloroethene monomers. Cov khoom no yog cov khoom siv polymer ntau heev, nrog rau polyethene thiab polypropylene. Peb tuaj yeem faib cov PVC ua ob pawg raws li daim ntawv nruj thiab hloov tau yooj yim. Cov khoom siv PVC nruj yog qhov tseem ceeb hauv kev tsim kho kev xav tau, qhov hloov pauv PVC daim ntawv yog qhov tseem ceeb rau kev xaim thiab cables.
Daim duab 01: Rov ua dua chav ntawm PVC
Muaj peb kauj ruam tseem ceeb hauv kev tsim cov PVC. Thawj kauj ruam suav nrog kev hloov pauv ntawm ethane rau hauv 1, 2-dichloroethane. Cov kauj ruam no yog ua los ntawm chlorination. Cov kauj ruam thib ob ntawm PVC ntau lawm yog tawg ntawm 1, 2-dichloroethane rau hauv chloroethene, nrog rau kev tshem tawm ntawm HCl molecule. Cov kauj ruam thib peb thiab zaum kawg ntawm PVC ntau lawm yog cov txheej txheem polymerization ntawm chloroethene txhawm rau tsim cov khoom siv PVC los ntawm cov txheej txheem dawb radical polymerization.
PVC muaj ntau yam khoom tseem ceeb suav nrog kev ua haujlwm siab thiab cov cuab yeej siv tau zoo, tsis muaj cua sov ruaj khov, nplaim hluav taws xob zoo, hluav taws xob rwb thaiv tsev siab, thiab tshuaj lom neeg. Ntxiv mus, muaj ntau yam txiaj ntsig rau kev siv PVC. Piv txwv li, nws tau yooj yim muaj nyob rau hauv kev ua lag luam, thiab nws yog cov khoom pheej yig nrog lub zog tensile zoo. Cov khoom no kuj tiv taus cov tshuaj xws li acids thiab bases.
PVDC yog dab tsi?
Lo lus PVDC sawv cev rau polyvinylidene chloride. Nws yog homopolymer ntawm vinylidene chloride. Cov khoom siv no feem ntau yog siv los ntawm Saran qhwv, ib lub hnab yas yas uas tau qhia tsis ntev los no (nyob ib ncig ntawm 2004). Txawm li cas los xij, cov qauv no tau hloov pauv vim qee qhov kev txhawj xeeb ib puag ncig vim nws cov ntsiab lus chlorine siab. Cov khoom no yog ib qho kev thaiv zoo heev rau dej, oxygen, thiab aromas. Tsis tas li ntawd, PVDC qhia tau hais tias cov tshuaj tiv thaiv zoo tshaj plaws ntawm alkalis, acids, thiab lwm yam. Tsis tas li ntawd, PVDC yog insoluble hauv roj thiab cov kuab tshuaj organic. Nws muaj tsawg heev noo noo rov qab thiab tseem impervious rau pwm tsim, kab mob thiab kab puas. Txawm li cas los xij, PVDC cov khoom no yog soluble hauv polar solvents. Thaum qhov kub thiab txias, PVDC dhau los ua cov txheej txheem HCl.
Daim duab 02: Rov Ua Haujlwm ntawm PVDC
Raws li nws cov khoom tshwj xeeb, PVDC muaj ntau daim ntawv thov; siv los ua cov khoom ntim, raws li cov dej-raws li txheej rau lwm cov yeeb yaj kiab yas, rau kev tu cov ntaub, lim, cov ntxaij vab tshaus, daim kab xev, thiab lwm yam, tsim cov menyuam roj hmab plaub hau, khoom tsiaj, fabrics, fishnet, khau insoles, thiab lwm yam.
Qhov txawv ntawm PVC thiab PVDC yog dab tsi?
PVC thiab PVDC yog cov polymers uas muaj ntau cov monomer units txuas rau ib leeg ntawm covalent bonds. PVC stands rau polyvinyl chloride thaum PVDC sawv rau polyvinylidene chloride. Qhov sib txawv tseem ceeb ntawm PVC thiab PVDC yog PVC yog ua los ntawm chloroethene monomers, whereas PVDC khoom yog ua los ntawm vinylidene chloride.
Hauv qab infographic tabulates qhov sib txawv ntawm PVC thiab PVDC kom ntxaws.
Summary – PVC vs PVDC
Lub sij hawm PVC sawv cev rau polyvinyl chloride thaum lub sij hawm PVDC sawv cev rau polyvinylidene chloride. Qhov sib txawv tseem ceeb ntawm PVC thiab PVDC yog cov khoom siv PVC yog ua los ntawm chloroethene monomers, whereas PVDC khoom yog ua los ntawm vinylidene chloride.
