Cellulose ether ipolymer yakagadzirwa kubva kucellulose yechisikigo kuburikidza nekuchinja kwemakemikari. Cellulose ether inobva kucellulose yechisikigo. Kugadzirwa kwecellulose ether kwakasiyana nemapolymer ekugadzira. Chinhu chayo chikuru icellulose, musanganiswa wepolymer wechisikigo. Nekuda kwehunhu hwechimiro checellulose yechisikigo, cellulose pachayo haina kugona kuita ne etherification agents. Zvisinei, mushure mekurapwa kwemushonga wekuzvimba, hydrogen bonds yakasimba pakati pemaketani emamorekuru nemaketani inoparadzwa, uye kusunungurwa kwehydroxyl group kunova reactive alkali cellulose. Wana cellulose ether.
Hunhu hwema ether e cellulose hunoenderana nerudzi, huwandu uye kugoverwa kwezvinotsiva. Kurongwa kwe ether e cellulose kunoenderanawo nerudzi rwezvinotsiva, mwero we etherification, kunyungudika uye hunhu hwakabatana hwekushandisa. Zvichienderana nerudzi rwezvinotsiva pa molecular chain, zvinogona kukamurwa kuita monoether ne mixed ether. Tinowanzo shandisa mc se monoether, uye HPmc se mixed ether. Methyl cellulose ether mc chigadzirwa mushure mekunge hydroxyl group iri pa glucose unit ye natural cellulose yatsiviwa ne methoxy group. Ichi chigadzirwa chinowanikwa nekutsiva chikamu che hydroxyl group pa unit ne methoxy group uye chimwe chikamu ne hydroxypropyl group. Fomura yechimiro ndeiyi [C6H7O2(OH)3-mn(OCH3)m[OCH2CH(OH)CH3]n]x Hydroxyethyl methyl cellulose ether HEmc, idzi ndidzo mhando huru dzinoshandiswa zvakanyanya uye dzinotengeswa mumusika.
Panyaya yekunyungudika, inogona kukamurwa kuita ionic neisina ionic. Ma ether e non-ionic cellulose anonyungudika mumvura anonyanya kuumbwa ne alkyl ethers mbiri dzakatevedzana uye hydroxyalkyl ethers. Ionic Cmc inonyanya kushandiswa mu sipo dzekugadzira, kudhinda nekudhaya machira, kutsvaga chikafu nemafuta. Non-ionic mc, HPmc, HEmc, nezvimwewo zvinonyanya kushandiswa muzvinhu zvekuvaka, latex coatings, mishonga, makemikari ezuva nezuva, nezvimwewo. Anoshandiswa se thickener, water retaining agent, stabilizer, dispersant uye film forming agent.
Nguva yekutumira: Mbudzi-24-2022