Video: Yuav ua li cas yog ib qho ntxiv polymer tsim?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Ib ntxiv polymer yog a polymer uas tsim los ntawm kev sib txuas yooj yim ntawm monomers yam tsis muaj kev sib koom ua ke ntawm lwm cov khoom. Ntxiv polymerization txawv ntawm condensation polymerization , uas ua ke tsim cov khoom, feem ntau yog dej. Ntxiv polymers yog tsim los ntawm ntxiv ntawm qee qhov yooj yim monomer units dua.
Yog li ntawd, dab tsi yog qhov ntxiv polymer tsim los ntawm Tetrafluoroethene?
Tetrafluoroethene nkag mus Ntxiv polymerization rau daim ntawv poly( tetrafluoroethene ) uas tseem paub raws li cov npe ntawm Teflon lossis Fluon.
Tom qab, lo lus nug yog, puas yog protein ntxiv polymer? Cov protein yog cov polymers ntawm cov amino acids, uas yog monomers uas muaj amine functional pawg thiab ib pawg carboxylic acid ua haujlwm. Ob pab pawg no hnov qab ua kom muaj kuab paug polymer , tsim ib daim ntawv cog lus amide: Cov protein yog tsim thaum ntau pua lossis ntau txhiab tus amino acids tsim amide bonds los ua polymers.
Ib yam li ntawd, peb theem ntawm kev ntxiv polymerization yog dab tsi?
Cov txheej txheem no muaj peb theem: pib , propagation, thiab kev txiav txim . Nyob rau hauv thawj theem, ib yam khoom raug muab faib ua ob qhov zoo tib yam, txhua tus muaj ib qho tsis muaj electron. (Peroxides, uas muaj O-O daim ntawv cog lus, feem ntau siv rau hauv lub luag haujlwm no.) Ib qho molecule uas tsis muaj hluav taws xob tsis sib xws yog hu ua dawb radical.
Vim li cas PVC yog ib qho ntxiv polymer?
(c) Polymerization ntawm chloroethene (vinyl chloride) Qhov no yog ib qho piv txwv ntawm Ntxiv polymerization . PVC yog tsim los ntawm dawb-radical polymerization hauv kev ncua. Thaum polymerization , cov polymer precipitates tawm raws li nws yog tsim, vim nws yog insoluble nyob rau hauv lub monomer.
Pom zoo:
Vim li cas PVC yog ib qho ntxiv polymer?
(c) Polymerization ntawm chloroethene (vinyl chloride) Qhov no yog ib qho piv txwv ntawm ntxiv polymerization. PVC yog tsim los ntawm cov dawb radical polymerization hauv kev ncua. Thaum lub sij hawm polymerization, lub polymer precipitates tawm raws li nws yog tsim, vim nws yog insoluble nyob rau hauv lub monomer
Lub hauv paus ntsiab lus twg piav qhia tias vim li cas AFC poob qis thaum cov zis nce ntxiv cov ntsiab lus piav qhia vim li cas AVC nce ntxiv thaum cov zis nce ntxiv?
AFC poob qis vim qhov tso zis ntau ntxiv vim muaj kev sib kis. Tus nqi ruaj khov yog kis mus rau ntau dua thiab ntau dua units ntawm cov khoom tso tawm raws li cov zis ntau ntxiv. AVC nce raws li cov zis nce vim qhov txo qis rov qab los. Vim qhov txo qis rov qab mus rau kev ua haujlwm, nws raug nqi ntau dua los tsim txhua chav ntxiv ntawm cov zis
Puas yog nuclear yog ib qho khoom siv txuas ntxiv mus ntxiv?
Nuclear zog feem ntau yog suav hais tias yog lwm lub zog tsis txuas ntxiv dua tshiab. Txawm hais tias lub zog nuclear nws tus kheej yog lub zog tauj dua tshiab, cov khoom siv hauv nuclear fais fab nroj tsuag tsis yog. Nuclear zog sau lub zog muaj zog nyob rau hauv lub nucleus, los yog core, ntawm ib tug atom
Puas yog nylon ib qho ntxiv polymer?
Nplhaib-qhib polymerization yog cov txheej txheem ntxiv tab sis nyiam muab cov kua nplaum zoo li polymers tab sis ua raws li stoichiometry ntawm ntxiv polymerization. Nylon 6 (tsim los thwart lub patent ntawm nylon 6,6) yog tsim los ntawm ntxiv polymerization, tab sis chemically resembles raug polyamides
Ib qho piv txwv ntawm ntxiv polymer yog dab tsi?
Polyolefins. Ntau qhov sib ntxiv polymers yog tsim los ntawm unsaturated monomers (feem ntau muaj C = C ob daim ntawv cog lus). Piv txwv ntawm cov polyolefins yog polyethenes, polypropylene, PVC, Teflon, Buna rubbers, polyacrylates, polystyrene, thiab PCTFE