Qhov Tseem Ceeb Qhov txawv - Styrene vs Polystyrene
Styrene thiab polystyrene yog ob qho tseem ceeb organic tebchaw nrog ntau yam kev siv. Qhov sib txawv tseem ceeb ntawm styrene thiab polystyrene yog tias nws yog lub polymerization ntawm styrene uas tsim polystyrene, hluavtaws thermoplastic elastomer. Styrene yog tshuaj hu ua vinyl benzene thiab yog ib qho ntawm cov khoom qub tshaj plaws hauv ntiaj teb. Cov tshuaj tsw qab no tau raug cais tawm thawj zaug los ntawm qee yam ntuj tsim nyob rau xyoo 1839. Tom qab xyoo 1930, cov kws tshuaj muaj peev xwm tsim cov polystyrene hauv kev lag luam nplai los ntawm kev ntxiv polymerization ntawm styrene monomer units. Polystyrene tau dhau los ua ib qho ntawm cov yas siv ntau tshaj plaws, tshwj xeeb tshaj yog thaum Tsov Rog Ntiaj Teb Zaum II. Txawm niaj hnub no, styrene thiab polystyrene ua si qee lub luag haujlwm tseem ceeb hauv kev lag luam polymer vim lawv cov yam ntxwv ntawm lub cev thiab tshuaj lom neeg.
Styrene yog dab tsi?
Styrene yog tshuaj hu ua vinyl benzene. Tus kws tshuaj German Edward Simon thawj zaug cais nws hauv xyoo 1839 los ntawm cov khoom siv ntuj xws li storax thiab zaj cov ntshav (ib qho resin tau los ntawm cov txiv hmab txiv ntoo ntawm Malayan rattan xibtes). Txog rau thaum xyoo 1920s styrene tsis tau ua haujlwm dav hauv kev lag luam. Ib tug kws tshuaj Fab Kis, M. Berthelot hauv xyoo 1851, thawj zaug qhia txog lub hauv paus ntawm kev lag luam tam sim no ntawm styrene. Raws li nws txoj kev, styrene monomers yog tsim los ntawm kev hla ethylene thiab benzene los ntawm lub raj kub kub lossis luv luv los ntawm lub cev qhuav dej ntawm ethyl benzene. Styrene tuaj yeem ua polymerized siv hnyav, ntau, emulsion, lossis tshem tawm cov txheej txheem polymerization nrog cov organic peroxides ua catalysts.
Styrene feem ntau yog siv los ua raw khoom rau kev tsim cov polystyrene thiab styrene-butadiene roj hmab (SBR). Vim yog ob qho khoom tseem ceeb no, kev tsim cov styrene-based polymers tau dhau los ua lub ntiaj teb thib peb loj tshaj plaws polymer ntau lawm. Thawj thiab thib ob qib yog tau los ntawm kev tsim cov ethylene thiab PVC. Polystyrene yog dav siv los ua cov khoom ntim khoom. SBR yog ib qho pheej yig hluavtaws elastomer siv dav hauv kev tsim cov log tsheb.
Daim duab 01: Polystyrene Formation
Copolymers ntawm styrene-acrylonitrile yog siv los ua lub tsev tshuab, cov khoom siv tsheb, thiab cov roj teeb. Raws li styrene monomer muaj benzene, raug rau siab concentration ntawm styrene monomer yuav ua rau ua pa thiab mucous daim nyias nyias. Ntev raug rau styrene yuav ua rau muaj kev raug mob hauv lub paj hlwb thiab lub siab puas. Yog li, yuav tsum tau ceev faj thaum thauj khoom, sib tov, thiab ua haujlwm kub ntawm styrene.
YPolystyrene yog dab tsi?
Polystyrene yog cov organic thermoplastic elastomer tsim los ntawm polymerization ntawm styrene lossis yas benzene. Nws yog ib qho nyuaj, hnav, amorphous elastomer nrog cov khoom siv hluav taws xob zoo thiab tsis muaj dej noo. Ntxiv mus, nws yog ib qho nyuaj, pob tshab thiab yooj yim molded, tsis zoo li ntau lwm yam thermoplastics. Lub cev lub cev ntawm polystyrene tuaj yeem hloov pauv los ntawm qhov sib txawv ntawm cov khoom siv molecular, cov txheej txheem ua haujlwm thiab cov khoom siv ntxiv siv thaum nws cov txheej txheem tsim khoom.
Muaj ntau daim ntawv thov ntawm polystyrene, suav nrog cov vuas phab ntsa, lo ntsiab muag, lub kaus mom lub raj mis, cov khoom siv hluav taws xob, cov thawv me me, thiab cov thawv tso saib. Tsis tas li ntawd, cov polymer no tau siv dav los ua cov khoom ntim khoom noj pheej yig. Cov filaments ntawm polystyrene yog siv rau txhuam bristles. Nthuav polystyrene (EPS) los yog foamed polystyrene yog tsim los ntawm cua sov polystyrene nyob rau hauv lub xub ntiag ntawm ib tug tshuab thiab ib tug volatile kua xws li propylene, butylene, los yog fluorocarbons.
Daim duab 02: Polystyrene
EPS yog siv dav hauv cov khoom siv ntab vim nws qhov ntom ntom. Ntxiv mus, nws yog dav siv raws li thermal rwb thaiv tsev nyob rau hauv lub tub yees, txias cia chav tsev thiab nruab nrab ntawm lub tsev phab ntsa. Tsis tas li ntawd, EPS muaj peev xwm nqus tau zoo heev. Yog li, nws yog siv los ua cov khoom ntim hnyav, uas txuag cov nqi xa khoom thiab kev tawg.
Qhov txawv ntawm Styrene thiab Polystyrene yog dab tsi?
YStyrene vs Polystyrene |
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| Styrene yog vinyl aromatic hydrocarbon uas ua raws li monomer ntawm polystyrene. | Polystyrene yog cov organic thermoplastic elastomer tsim los ntawm polymerization ntawm styrene |
| ntau lawm | |
| Styrene yog tsim los ntawm lub cev qhuav dej ntawm ethyl benzene. | Polystyrene yog tsim los ntawm polymerization ntawm styrene. |
| Daim ntawv thov | |
| Styrene yog siv los ua raw khoom rau kev tsim cov polystyrene, SBR thiab copolymer ntawm styrene-acrylonitrile, thiab acrylonitrile-butadiene-styrene (ABS). | Polystyrene yog siv rau phab ntsa vuas, lo ntsiab muag, lub kaus mom, cov khoom siv hluav taws xob, cov thawv me me, cov thawv ntim khoom, cov khoom ntim khoom, cov khoom siv insulating, thiab lwm yam. |
Summary – Styrene vs Polystyrene
Styrene (vinyl benzene) yog vinyl aromatic hydrocarbon uas ua raws li cov monomer rau kev tsim cov polystyrene los ntawm kev ntxiv polymerization. Polystyrene yog ib lub teeb yuag, cov tawv tawv, qis-tuab thermoplastic elastomer nrog cov rwb thaiv tsev zoo thiab noo noo resistant cov khoom. Styrene feem ntau yog siv los tsim polystyrene, SBR thiab copolymer ntawm styrene-acrylonitrile thiab ABS rubbers thaum polystyrene yog dav siv los ua cov ntim khoom thiab rwb thaiv tsev. Qhov no yog qhov txawv ntawm Styrene thiab Polystyrene.
Download PDF Version ntawm Styrene vs Polystyrene
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Styrene thiab Polystyrene.
