Qhov sib txawv tseem ceeb ntawm polystyrene thiab polypropylene yog cov monomer rau polystyrene yog styrene, thaum lub monomer rau polypropylene yog propylene.
Polymers yog cov molecules loj, uas muaj tib lub qauv tsev rov ua dua thiab ntau dua. Cov kev rov ua dua no yog "monomers". Monomers khi nrog ib leeg ntawm covalent bonds los tsim ib lub polymer. Ntxiv mus, lawv muaj qhov hnyav molecular thiab muaj ntau dua 10,000 atoms. Nyob rau hauv cov txheej txheem synthesis, lossis "polymerization", peb tuaj yeem tau txais cov saw hlau ntev dua. Yog li, polystyrene thiab polypropylene yog ob yam polymers.
YPolystyrene yog dab tsi?
Polystyrene yog tsim los ntawm monomer styrene. Nws lub npe IUPAC yog poly (1-phenylethene-1, 2-diyl), thiab nws yog ib qho aromatic polymer. Nws ntev hydrocarbon saw muaj phenyl pawg txuas nrog txhua lwm cov pa roj carbon atom hauv polystyrene. Tsis tas li ntawd, raws li cov qauv uas cov phenyl pawg (pendant pawg) txuas rau cov saw hlau, muaj peb hom polymer: isotactic (tag nrho cov phenyl pawg nyob rau tib sab ntawm cov saw), syndiotactic (cov phenyl pawg yog. nyob rau hauv ob sab nyob rau hauv ib tug alternating qauv) thiab atactic (cov phenyl pawg muab nyob rau hauv ib tug random qauv).
Ntxiv mus, polystyrene yog cov yas yas, thiab nws yog tsim los ntawm cov dawb radical vinyl polymerization. Tsis tas li ntawd, nws yog cov khoom siv tawv thiab tawv.
Daim duab 01: Polystyrene Ua Npuas Ncauj
Polystyrene muaj txiaj ntsig zoo hauv kev ua cov khoom ua si, khoom siv hauv chav ua noj, khob haus, ntim khoom, khoom siv hauv computer, thiab lwm yam. Tsis tas li ntawd, peb tuaj yeem rov ua dua polystyrene. Txawm hais tias nws yog cov yas siv thoob plaws ntiaj teb, nws ua rau muaj kev puas tsuaj rau ib puag ncig vim nws muaj peev xwm rov ua dua.
YPolypropylene yog dab tsi?
Polypropylene kuj yog cov yas polymer. Nws cov monomer yog propylene, uas muaj peb carbons thiab ib ob daim ntawv cog lus ntawm ob ntawm cov pa roj 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, nws yog ib qho yooj yim los tsim, thiab peb tuaj yeem tsim nws nrog siab purity.
Daim duab 2: Ib Daim Ntawv Pov Hwm Polypropylene
Polypropylene muaj cov khoom tseem ceeb hauv qab no:
Nyob zoo ib tsoom phooj ywg sawv daws
Vim cov khoom saum toj no, cov khoom siv no muaj txiaj ntsig zoo rau kev tsim cov kav dej, ntim, khoom siv hauv tsev, thiab ntim khoom thiab cov khoom siv tsheb.
Qhov txawv ntawm Polystyrene thiab Polypropylene yog dab tsi?
Ob leeg polystyrene thiab polypropylene yog cov khoom siv polymer uas peb siv hauv peb lub neej txhua hnub. Qhov sib txawv tseem ceeb ntawm polystyrene thiab polypropylene yog tias monomer ntawm polystyrene yog styrene thaum lub monomer ntawm polypropylene yog propylene. Tsis tas li ntawd, pawg pendant ntawm polystyrene yog ib pawg phenyl thaum pawg pendant ntawm polypropylene yog ib pawg methyl. Cov pab pawg pendant no txiav txim siab qhov tacticity ntawm cov polymer.
Ntxiv mus, muaj qhov sib txawv ntawm polystyrene thiab polypropylene hauv lawv cov txheej txheem tsim khoom thiab. Peb tuaj yeem tsim cov polystyrene ntawm cov dawb radical vinyl polymerization thiab polypropylene ntawm saw-loj polymerization.
Hauv qab infographic qhia txog qhov sib txawv ntawm polystyrene thiab polypropylene.
Summary – Polystyrene vs Polypropylene
Hauv luv luv, polystyrene thiab polypropylene yog cov khoom siv polymer tseem ceeb heev. Qhov sib txawv tseem ceeb ntawm polystyrene thiab polypropylene yog qhov monomer ntawm polystyrene yog styrene thaum lub monomer ntawm polypropylene yog propylene.
