Qhov sib txawv tseem ceeb ntawm oligomer thiab polymer yog tias cov oligomer tsim thaum ob peb monomers undergo polymerization whereas cov ntaub ntawv polymer thaum muaj coob tus monomers undergo polymerization.
Polymers yog cov macromolecules loj uas muaj ntau qhov rov ua dua tshiab; Peb hu lawv monomers. Cov monomers tau txais cov txheej txheem hu ua polymerization txhawm rau tsim cov khoom siv polymer. Ib qho oligomer kuj yog ib hom polymer tab sis muaj tsawg dua cov chav nyob hauv nws cov qauv.
Oligomer yog dab tsi?
Ib qho oligomer yog cov khoom siv polymeric uas muaj ob peb tus lej rov ua dua. Yog li ntawd, ob peb tus lej ntawm cov monomers dhau los ua polymerization thaum tsim cov oligomer. Cov monomers uas muaj ob daim ntawv cog lus lossis ob pawg ua haujlwm tuaj yeem dhau los ua cov txheej txheem polymerization los tsim cov ntawv cog lus ntawm lawv. Thaum kawg, nws ua rau oligomer lossis polymer nyob ntawm seb muaj pes tsawg tus monomers siv thaum lub sijhawm ua haujlwm. Es tsis txhob hu cov txheej txheem polymerization, peb tuaj yeem hu nws ua oligomerization yog tias nws tsim ib qho oligomer nws thiaj li.
Daim duab 01: Polybutene yog Synthetic Oligomer, qhov no yog qhov rov ua dua ntawm cov khoom no
Ntawm no, yog tias tus lej ntawm monomers yog ob, nws tsim ib qho dimer; peb monomers tsim ib tug trimer, plaub monomers tsim ib tug tetramer, thiab lwm yam. Ib yam li ntawd, peb muaj peev xwm npe lub oligomers raws li. Tsis tas li ntawd, muaj ob hom loj ntawm oligomers. Namely, lawv yog homo-oligomers thiab hetero-oligomers. Homo-oligomers tsim thaum monomers ntawm tib hom undergo oligomerization thaum hetero-oligomers tsim thaum monomers ntawm ntau hom undergo oligomerization. Ntau cov roj yog ntuj oligomers, thiab thaum xav txog cov khoom siv hluavtaws, cov yas thiab polybutene yog cov piv txwv zoo.
YDab tsi yog Polymer?
A polymer yog ib qho macromolecule uas muaj ntau qhov rov ua dua tshiab. Yog li, nws siv ntau tus monomers rau kev tsim cov khoom siv no. Cov monomers txuas nrog ib leeg los ntawm covalent bonds tom qab dhau los ntawm cov txheej txheem polymerization. Piv txwv li, molecular mass thiab ntom ntawm cov ntaub ntawv no yog siab heev.
Daim duab 02: Kev faib tawm ntawm Polymers nyob ntawm Biodegradability
Tsis tas li ntawd, muaj ntau yam kev faib tawm uas peb tuaj yeem siv los faib cov polymers kom nkag siab txog lawv cov khoom yooj yim. Tsuas yog, nyob ntawm tus qauv ntawm cov khoom siv polymer, peb tuaj yeem categorize lawv li linear polymers, branched polymers thiab network polymers. Los yog lwm yam, peb tuaj yeem faib lawv raws li hom monomer peb siv rau polymerization. Qhov ntawd yog; yog tias tib hom monomers siv, nws muab homopolymer. Tab sis, yog tias sib txawv monomers siv, nws muab ib heteropolymer. Tshaj tag nrho cov kev faib tawm no, qhov tseem ceeb tshaj plaws yog kev faib cov polymers raws li cov khoom. Raws li, muaj peb chav kawm tseem ceeb ntawm polymers. Lawv yog; thermoplastics, thermosets thiab elastomers.
Dab tsi yog qhov zoo sib xws ntawm Oligomer thiab Polymer?
- Oligomer thiab Polymer daim ntawv los ntawm monomers.
- Vim li no, ob qho tib si yog cov qauv polymeric.
- Tsis tas li, ob qho tib si muaj cov khoom siv tshuaj lom neeg ntawm cov monomers.
Qhov txawv ntawm Oligomer thiab Polymer yog dab tsi?
Oligomer yog cov khoom siv polymeric uas muaj ob peb tus lej rov ua dua thaum cov khoom siv polymer yog macromolecule uas muaj ntau qhov rov ua dua tshiab. Yog li ntawd, cov ntaub ntawv no feem ntau sib txawv ntawm ib leeg raws li tus naj npawb ntawm cov monomers uas dhau los ua cov txheej txheem tsim. Yog li, peb tuaj yeem hais tias qhov sib txawv tseem ceeb ntawm oligomer thiab polymer yog tias oligomers tsim thaum ob peb monomers undergo polymerization whereas polymers tsim thaum muaj coob tus monomers undergo polymerization. Txawm li cas los xij, tsis yog lub npe ntawm cov txheej txheem tsim ntawm oligomers li polymerization, peb tuaj yeem hu nws ua oligomerization vim nws ua rau oligomer thaum kawg ntawm cov txheej txheem.
Ntxiv mus, peb tuaj yeem txheeb xyuas qhov sib txawv ntawm oligomer thiab polymer raws li lawv cov khoom. Qhov ntawd yog; Hauv kev sib piv rau oligomers, polymers muaj ntau dua molecular masses thiab ntom.
Summary – Oligomer vs Polymer
Oligomers yog ib hom polymers uas txawv ntawm cov polymers nyob ntawm seb muaj pes tsawg tus monomers hauv cov qauv polymer. Yog li ntawd, qhov sib txawv tseem ceeb ntawm oligomer thiab polymer yog tias cov oligomers tsim thaum ob peb monomers undergo polymerization whereas cov polymers tsim thaum muaj coob tus monomers undergo polymerization.
