Qhov Tseem Ceeb Qhov txawv - Polymer vs Copolymer
"Polymers" yog ib pab pawg tseem ceeb ntawm cov molecules suav nrog ntau pua ntau yam ntawm cov molecules. Cov no tau muab faib raws li lawv cov qauv, cov khoom siv lub cev lossis kev siv. Lub copolymer yog xws li ib pawg ntawm cov polymers uas tau muab faib raws li nws qhov sib txawv ntawm cov qauv ntawm lwm cov polymers. Qhov sib txawv tseem ceeb ntawm polymer thiab copolymer yog cov polymer yog ib qho loj heev molecule ua los ntawm tib los yog txawv monomers whereas, ib copolymer yog ib tug polymer ua los ntawm txawv monomers.
YDab tsi yog Polymer?
Y A polymer yog ib qho loj molecule tsim los ntawm rov ua dua chav hu ua monomers, txuas ntawm covalent bonds. Cov txheej txheem uas tsim cov polymer hu ua polymerization. Polymerization tshwm sim hauv cov saw hlau polymer tsim los ntawm monomers. Cov saw hlau polymer no tuaj yeem txuas rau ib leeg ntawm Van Der Waal rog. Qhov no ua rau 3D qauv ntawm cov polymer. Yog li, lawv hu ua macromolecules.
Raws li hom monomers tam sim no, polymers muaj ob hom: Homopolymers thiab Copolymers
Nyob ntawm lub cev lub cev ntawm cov polymers, muaj 3 chav kawm loj:
Thermoplastics - ib lub voj voog uas tuaj yeem yaj thiab hloov kho
Elastomers - polymers muaj zog elastic
Thermosets - cov qauv peb sab uas tsis yaj thaum lawv tsim thiab degrade thaum cua sov
Raws li cov txheej txheem polymerization, cov polymers tau muab faib ua ntxiv polymers thiab condensation polymers.
Polymers tuaj yeem yog amorphous lossis semi-crystalline. Amorphous polymers tsis muaj cov qauv txiav txim thaum crystalline polymers muaj cov qauv zoo. Amorphous polymers tsim pob tshab polymer cov qauv whereas semi-crystalline polymers yog opaque.
Copolymer yog dab tsi?
A copolymer yog ib hom polymer uas muaj kev sib txawv ntawm monomers dua lwm cov polymers. Raws li kev npaj ntawm cov monomers nyob rau hauv cov saw hlau polymer, cov polymers tau muab faib ua ob hom homopolymers thiab copolymer. Ib homopolymer yog ib qho kev npaj uas tsuas yog ib qho monomer koom nrog hauv kev tsim cov polymer. Lub copolymer yog ib qho kev npaj uas ntau tshaj ib lub monomers koom nrog hauv kev tsim cov polymer.
Thaum polymerization tshwm sim hauv kev sib xyaw ntawm monomers, copolymers raug tsim. Tab sis copolymer tej zaum yuav muaj ntau yam sib txawv dua li cov homopolymers ua los ntawm monomers nyias. Ntau copolymers muaj kev lag luam tseem ceeb heev. Piv txwv li, Acrylonitrile butadiene styrene, nitrile roj hmab, thiab lwm yam.
Copolymers tuaj yeem muab faib ua ob peb pawg raws li nws tau tsim tawm ntawm ntau dua ib hom monomer.
Alternating copolymer - cov no muaj cov monomers tsis tu ncua
Block copolymer - muaj ob lossis ntau dua homopolymer subunits txuas rau ib leeg
Random copolymer - cov monomers tau teeb tsa hauv ib qho random
Branched copolymer - cov monomers yog teem rau hauv ceg
Daim duab 01: Hom Copolymer (1. Homo-polymer, 2. Alternating polymer, 3. Random copolymer, 4. Block copolymer, 5. Branched copolymer)
Qhov txawv ntawm Polymer thiab Copolymer yog dab tsi?
YPolymer vs Copolymer |
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| A polymer yog ib qho loj heev molecule tsim tawm ntawm rov ua dua units hu ua monomers. | Ib copolymer yog ib hom polymer uas muaj kev sib txawv ntawm monomers dua lwm cov polymers. |
| Monomer Arrangement | |
| Polymers muaj peev xwm tsuas muaj ib hom monomer xwb. | Copolymers tseem ceeb muaj ntau dua ib hom monomer. |
| Polymers tuaj yeem tsim los ntawm kev ntxiv polymerization lossis condensation polymerization. | Copolymers yog tsim los ntawm condensation polymerization xwb. |
| qauv | |
| Polymers tuaj yeem muaj cov qauv yooj yim lossis nyuaj. | Copolymers feem ntau muaj cov qauv nyuaj. |
Summary – Polymer vs Copolymer
Polymers ib txwm muaj cov qauv nyuaj vim tias nws yog cov khoom sib sau ntawm ntau cov monomers. Cov monomers no tuaj yeem tsim los ntawm tib hom lossis ntau hom. Cov monomers no tuaj yeem npaj ntau txoj hauv kev los tsim cov qauv polymer. Raws li hom monomers, muaj ob hom loj hu ua Homopolymers thiab Copolymer. Qhov sib txawv tseem ceeb ntawm polymer thiab copolymer yog cov polymer yog ib qho loj molecule ua los ntawm tib los yog txawv monomers whereas ib copolymer yog ib tug polymer ua los ntawm txawv monomers.
Download PDF Version ntawm Polymer vs Copolymer
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li cov ntawv sau tseg. Thov download PDF version ntawm no Qhov txawv Ntawm Polymer thiab Copolymer.
