Qhov sib txawv tseem ceeb ntawm linear thiab branched polymers yog cov linear polymers muaj cov qauv linear tsis muaj ceg, whereas branched polymers muaj ib tug branched qauv.
Polymers yog cov molecules loj heev uas muaj ntau qhov rov ua dua tshiab txuas rau ib leeg ntawm covalent chemical bonds. Ntxiv mus, cov txheej txheem ntawm kev tsim cov polymer yog "polymerization". Yog li, chav tsev rov ua dua muab cov qauv ntawm monomers uas koom nrog cov txheej txheem polymerization. Raws li, peb tuaj yeem faib cov polymers rau hauv peb pawg raws li cov qauv ntawm cov polymer; linear, branched thiab network polymers.
Dab tsi yog Linear Polymers?
Linear polymers yog macromolecules uas muaj ntau qhov rov ua dua los yog monomers uas txuas rau ib leeg ua ib txoj kab ncaj nraim. Yog li ntawd, cov polymers no muaj ib qho txuas txuas ntxiv. Lub caj qaum ntawm cov saw hlau polymer no muaj cov atoms uas khi nrog ib leeg covalently tsim cov saw hlau. Yog li ntawd, yog hais tias cov atoms yog tib hom, ces lawv yog linear homopolymers whereas yog cov atoms txawv ntawm ib leeg, ces cov polymer yog ib tug linear heteropolymer.
Daim duab 01: Tacticity hauv Polymers (sab saum toj rau hauv qab; atactic, syndiotactic thiab isotactic forms)
Tsis tas li ntawd, tuaj yeem muaj pawg sab lossis pawg pendant hauv cov qauv polymer no tab sis tsis muaj ceg ntoo (sab chains). Raws li kev npaj ntawm pawg pendant, muaj peb hom linear polymers li isotactic, atactic thiab syndiotactic. Ua ke, peb hu nws lub tacticity ntawm lub polymer. Isotactic polymers muaj pendant pawg ntawm tib sab ntawm cov saw hlau polymer; Cov ntaub ntawv syndiotactic muaj cov pendant pawg nyob rau hauv ib qho kev sib hloov qauv whereas atactic polymers muaj pendant pawg nyob rau hauv ib tug random yam.
Npaj Polymers yog dab tsi?
Branched polymers yog macromolecules uas muaj ntau qhov rov ua dua tshiab tau teem rau hauv cov qauv ceg. Cov khoom ntawm cov polymers no feem ntau yog nyob ntawm seb qhov degree ntawm branching. Sab chains tuaj yeem yog cov saw luv luv lossis cov saw ntev. Muaj ntau hom kev sib txawv ntawm cov polymers li graft polymers, comb polymers, txhuam polymers, thiab lwm yam nyob ntawm tus qauv.
Daim duab 02: Ib Lub Tuam Txhab Polymer
Qee yam piv txwv ntawm cov khoom ntuj tsim muaj xws li cov hmoov txhuv nplej siab thiab glycogen thaum cov khoom siv hluavtaws muaj xws li polyethene tsawg. Cov no feem ntau amorphous vim lawv tsis tuaj yeem ntim nruj rau hauv cov qauv tsis tu ncua.
Qhov txawv ntawm Kab thiab Kab Ntsig Polymers yog dab tsi?
Linear polymers yog macromolecules uas muaj ntau qhov rov ua dua lossis cov monomers uas txuas rau ib leeg ua ib txoj kab ncaj nraim thaum branched polymers yog macromolecules uas muaj ntau qhov rov ua dua chav nyob hauv cov qauv ceg. Li no qhov sib txawv tseem ceeb ntawm linear thiab branched polymers yog tias linear polymers muaj ib tug linear qauv tsis muaj ceg, whereas branched polymers muaj ib tug branched qauv.
Tsis tas li, raws li cov kab hluav taws xob muaj cov qauv yooj yim, lawv ntim nruj tab sis, txij li cov ceg ntoo polymers muaj cov qauv nyuaj, lawv ntim xoob. Yog li ntawd, raws li qhov no, peb tuaj yeem txheeb xyuas qhov sib txawv ntawm linear thiab branched polymers. Qhov ntawd yog; Qhov ceev ntawm linear polymers yog siab nyob rau hauv kev sib piv rau cov branched polymers. Raws li lwm qhov sib txawv tseem ceeb ntawm linear thiab branched polymers, peb tuaj yeem pom tau tias cov ntsiab lus melting thiab boiling ntawm linear polymers yog siab dua li ntawm branched polymers.
Cov duab hauv qab no ntawm qhov sib txawv ntawm linear thiab branched polymers tabulates ntau qhov sib txawv ntawm ob qho tib si.
Summary – Linear vs Branched Polymers
Polymers yog macromolecules. Muaj peb hom li linear, branched thiab network polymers. Qhov sib txawv tseem ceeb ntawm linear thiab branched polymers yog tias linear polymers muaj cov qauv linear tsis muaj ceg, thaum branched polymers muaj ib tug branched qauv.
