Qhov sib txawv tseem ceeb ntawm PVC thiab yas yog PVC yog ib qho polymer thaum vinyl yog ib pab pawg ua haujlwm.
Polymers yog cov molecules loj, uas muaj tib lub qauv tsev rov ua dua thiab ntau dua. Cov units rov ua dua yog "monomers". Cov monomers khi nrog ib leeg nrog covalent bonds los tsim ib lub polymer. Polymers muaj qhov sib txawv ntawm lub cev thiab tshuaj lom neeg ntau dua li lawv cov monomers. Ntxiv mus, raws li tus naj npawb ntawm cov chav nyob hauv cov polymers, lawv cov khoom sib txawv. Muaj ntau cov polymers tam sim no nyob rau hauv ib puag ncig ntuj, thiab lawv ua lub luag haujlwm tseem ceeb heev. Synthetic polymers kuj tau siv dav rau ntau lub hom phiaj. Polyethylene, polypropylene, PVC, nylon, thiab Bakelite yog ib co hluavtaws polymers.
YPVC yog dab tsi?
Polyvinyl chloride, txhais tau tias yog PVC, yog cov khoom siv hluavtaws ua los ntawm monomer vinyl chloride. Vinyl chloride yog ib qho alkene derivative uas muaj cov tshuaj chlorine hloov pauv hloov ntawm hydrogen atom. Hauv kev tsim cov PVC, ib qho ntxiv polymerization tshwm sim los ntawm kev npaj cov monomers hauv lub taub hau rau tus Tsov tus tw zam. Nov yog linear polymer.
Nyob rau hauv lub polymer, chlorine atoms tshwm sim nyob rau hauv ib tug alternating qauv. Yog li, txog 57% huab hwm coj ntawm PVC muaj cov tshuaj chlorine. PVC yog analogous rau polyethylene. Txawm li cas los xij, muaj cov tshuaj chlorine hauv PVC tau hloov pauv nws cov khoom sib txawv rau polyethylene.
Daim duab 01: PVC kav
Ntxiv mus, PVC yog cov thermoplastic polymer. Nws yog nruj tab sis, los ntawm kev ntxiv ntau yam plasticizers nws ua tau yooj yim dua thiab softer. Nws tseem ceeb heev rau ntau lub hom phiaj. Yog li ntawd, PVC yog qhov thib peb feem ntau tsim cov yas hauv khw. PVC kuj pheej yig thiab ruaj khov. Nws yog ib qho yooj yim rau kev ua hauj lwm nrog thiab muaj kev tiv thaiv siab rau tshuaj lom neeg. Yog li ntawd, PVC yog ib qho tseem ceeb hauv kev tsim cov kav dej, hluav taws xob cables, thiab tseem muaj txiaj ntsig rau ntau lub hom phiaj hauv kev tsim kho kev lag luam. Tsis tas li ntawd, nws tseem ceeb hauv khaub ncaws, ua rooj tog, khoom ua si thiab lwm yam.
Vimyl yog dab tsi?
Vinyl yog ib pawg ua haujlwm nrog cov qauv −CH=CH2. Raws li IUPAC nomenclature, peb tuaj yeem hu nws ua "ethenyl". Cov pab pawg ua haujlwm no yog muab los ntawm ethene. Thaum ib qho hydrogen atom ntawm ethene hloov nrog lwm lub atom, nws dhau los ua ib pawg vinyl. Cov no yog cov pab pawg tsis txaus ntseeg. Lawv tuaj yeem raug cov tshuaj tiv thaiv uas yog yam ntxwv rau alkenes vim yog ob daim ntawv cog lus.
Daim duab 02: Rov ua dua Chav ntawm PVF
Ntau hom vinyl polymers suav nrog PVC, PVF thiab PVAc. PVC yog polyvinyl chloride uas muaj chlorine atom nyob rau hauv pawg yas thiab PVF yog polyvinyl fluoride uas muaj fluorine atom es tsis txhob chlorine atom nyob rau hauv cov vinyl pawg. Ib yam li ntawd, PVAc yog polyvinyl acetate uas muaj ib pawg acetate nyob rau hauv qhov chaw ntawm chlorine (los yog fluorine) atom nyob rau hauv pawg yas.
Qhov txawv ntawm PVC thiab Vinyl yog dab tsi?
Polyvinyl chloride, txhais tau tias yog PVC, yog cov khoom siv hluavtaws ua los ntawm monomer vinyl chloride. Vinyl yog ib pawg ua haujlwm nrog cov qauv −CH=CH2. Qhov sib txawv tseem ceeb ntawm PVC thiab yas yog PVC yog ib qho polymer thiab yas yog ib pab pawg ua haujlwm. Thaum xav txog cov qauv tshuaj, cov tshuaj formula rau PVC yog −CH=CHCl thiab rau ib pawg yas, nws yog −CH=CH2.
Summary – PVC vs Vinyl
PVC yog cov khoom siv hluavtaws ua los ntawm monomer vinyl chloride, thaum Vinyl yog ib pawg ua haujlwm nrog cov qauv −CH=CH2. Qhov sib txawv tseem ceeb ntawm PVC thiab yas yog PVC yog ib qho polymer thiab yas yog ib pab pawg ua haujlwm.
