Qhov sib txawv tseem ceeb ntawm dimerization thiab polymerization yog qhov dimerization tsim ib lub dimer los ntawm ob chav monomer hos polymerization tsim ib lub polymer los ntawm ntau cov monomer units.
Dimerization kuj yog ib hom polymerization uas ib chav loj yog tsim los ntawm kev sib xyaw ntawm cov me me. Txawm li cas los xij, ob txoj kev no txawv ntawm ib leeg raws li cov khoom kawg uas tau tsim los ntawm cov txheej txheem no.
Dimerization yog dab tsi?
Dimerization yog ib hom polymerization uas lub dimer yog tsim los ntawm kev sib xyaw ntawm ob chav monomer. Yog li ntawd, peb tuaj yeem soj ntsuam dimerization raws li qhov sib ntxiv cov tshuaj tiv thaiv nyob rau hauv uas ob lub molecules ntawm tib lub compound react nrog ib leeg, tsim ib tug dimer. Peb tuaj yeem txheeb xyuas qhov dimer li ib qho oligomer uas muaj tsawg tus lej rov ua dua thiab cov ntawv cog lus ntawm ob chav monomer no tuaj yeem ua rau muaj zog lossis tsis muaj zog, covalent lossis cov ntawv cog lus intermolecular. Yog tias muaj cov ntawv cog lus cog lus nruab nrab ntawm lawv, lub dimer yog covalent dimer, tab sis yog tias muaj kev sib txuas lus sib txuas ntawm cov monomers, ces nws yog qhov tsis muaj qhov dimer.
Daim duab 01: 1, 2-Dioxetane yog Dimer ntawm Ob Formaldehyde Monomers
Ib homodimer yog tsim thaum zoo tib yam monomers ua ke thaum lub heterodimer tsim thaum sib txawv monomers ua ke. Cov txheej txheem rov qab ntawm dimerization yog dissociation; Hauv cov txheej txheem no, ob lub monomers sib cais.
YPolymerization yog dab tsi?
Polymerization yog cov txheej txheem tshuaj uas cuam tshuam nrog kev tsim cov khoom siv polymer los ntawm kev sib xyaw ua ke ntawm ntau cov monomers. Muaj ob lub ntsiab ntawm cov txheej txheem polymerization: ntxiv polymerization thiab condensation polymerization. Ntxiv nrog rau ob qho no, lwm cov txheej txheem polymerization tseem ceeb yog radical polymerization, uas yog ib daim ntawv ntawm ntxiv polymerization.
Ntxiv polymerization yog txheej txheem ntawm kev tsim cov polymer ntxiv los ntawm kev sib txuas cov monomers tsis txaus. Feem ntau cov piv txwv rau ntxiv polymers yog polyolefin polymers. Cov polyolefin polymers tsim thaum olefin monomers txuas nrog ib leeg. Feem ntau, olefins yog me me unsaturated compounds xws li alkene. Yog li ntawd, thaum cov olefins dhau los ua polymerization, cov nyiaj tsis txaus ntseeg ntawm cov monomers hloov mus rau hauv cov ntawv cog lus saturated. Txawm li cas los xij, monomer ntawm ntxiv polymerization tuaj yeem yog radical, cation lossis anion. Radical polymerization yog txheej txheem ntawm kev tsim cov khoom siv polymer los ntawm kev sib ntxiv ntawm cov dawb radicals. Kev tsim ntawm radicals tuaj yeem tshwm sim hauv ntau txoj hauv kev. Txawm li cas los xij, nws feem ntau cuam tshuam nrog tus pib molecule ua ib qho radical. Cov saw hlau polymer yog tsim los ntawm kev sib ntxiv ntawm cov radical tsim nrog cov tsis-radical monomers.
Daim duab 02: Radical Polymerization
Condensation polymerization yog ib hom ntawm polymerization nyob rau hauv uas ib tug polymer yog tsim los ntawm ib tug condensation cov tshuaj tiv thaiv. Cov khoom siv polymer no hu ua condensation polymer. Cov tshuaj tiv thaiv no cuam tshuam nrog kev sib koom ua ke ntawm cov molecules nrog ib leeg thaum tshem tawm cov khoom lag luam xws li dej molecules, methanol molecules, thiab lwm yam. Vim tias cov tshuaj tiv thaiv no tsim cov polymer, peb tuaj yeem piav qhia nws li polycondensation. Ntxiv mus, nws yog ib daim ntawv ntawm kauj ruam-loj hlob polymerization.
Qhov txawv ntawm Dimerization thiab Polymerization yog dab tsi?
Dimerization yog subtype ntawm polymerization. Qhov sib txawv tseem ceeb ntawm dimerization thiab polymerization yog tias dimerization tsim ib lub dimer los ntawm ob chav monomer thaum polymerization tsim ib tug polymer los ntawm ntau cov monomer units. Li no, dimerization tsim ib tug dimer thaum polymerization tsim ib tug polymer.
Cov lus hauv qab no piv cov yam ntxwv tseem ceeb ntawm ob txoj haujlwm ib sab kom pom qhov sib txawv ntawm qhov sib txawv ntawm dimerization thiab polymerization.
Summary – Dimerization vs Polymerization
Ob qhov txheej txheem dimerization thiab polymerization tsim ib chav loj los ntawm kev sib xyaw ntawm ob lossis ntau qhov me me. Cov chav loj yog hu ua dimers lossis polymers thaum cov chav me me hu ua monomers. Qhov sib txawv tseem ceeb ntawm dimerization thiab polymerization yog tias dimerization tsim ib lub dimer los ntawm ob chav monomer thaum polymerization tsim ib lub polymer los ntawm ntau cov monomer units.
