Inayiloni ne-PTFE ama-polymer okwenziwa ngabantu asetshenziswa kakhulu embonini ye-polymer.Inayiloni iyi-polyamide futhi i-polymer iyi-polymer ye-fluoro.Zombili zinesisindo esikhulu samangqamuzana futhi zingama-thermoplastic.I-PTFEiyi-phobic yamanzi, into engasebenzi kahle ngamakhemikhali ene-conductivity ephezulu kagesi, kanye ne-coefficient ephansi kakhulu yokungqubuzana.Inayiloni iwusilika futhi ingenye yazo zombili izinsimbi nezingezona izinsimbi, okuhlanganisa ithusi, ithusi, izinkuni, amapulasitiki, nerabha.
Yini inayiloni
Inayiloni iyi-aliphatic polymer, i-polyamide esetshenziswa kakhulu ezimbonini eziningi.Amanayiloni ayi-thermoplastics.Isetshenziswa njenge-bearing, kanye nempahla yokugqoka.Ukusetshenziswa okuvamile kwenayiloni kufana nokumiselela ithusi, ithusi, insimbi, ne-aluminium.Ngaphezu kwalokho, ingasetshenziswa njengenye into yokhuni, amapulasitiki, nenjoloba futhi.
Inayiloni iwusilika owaqala ukukhiqizwa uWallace Carothers ngo-1935. Amanayiloni akhiqizwa ngokusabela kwe-hexamethylenediamine nge-adicarboxylic acid (isilinganiso esingu-1:1) phambi kwamanzi, ku-reactor.
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Imicu yenayiloni isetshenziselwa ukukhiqiza amaveyili omshado, izintambo ezinsimbini zomculo, amakhaphethi, amapayipi, amatende, nezinto zokugqoka.Ifomu eliqinile lenayiloni liyasetshenziswa futhi kwezinye izimboni ukukhiqiza amakamu nezingxenye zemishini ezihlanganisa amagiya nezikulufu zemishini.I-Extrusion, casting, kanye ne-injection molding yizindlela ezisetshenziswayo ukukhiqiza inayiloni ebangeni lobunjiniyela.
Yini i-PTFE?
I-PTFE iyi-fluoropolymer yokwenziwa eyaziwa nangokuthi i-polytetrafluoroethylene (PTFE).Kuyinto etholwe ngephutha usokhemisi wase-Dupont, uDkt. Roy Plunkett ngo-1960, ngenkathi esebenzela ukuthola enye impahla ngezinjongo zokupholisa.
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Inenombolo eminingi yokusetshenziswa kwezohwebo ngenxa yezakhiwo zayo ezihlukile zomzimba namakhemikhali.Kuyinto impahla ye-hydrophobic.Ngakho-ke, amanzi noma izixazululo eziqukethe amanzi azikwazi ukumanzisa izindawo ze-polymer.i-polymer isetshenziswa kakhulu kumapani okupheka angagxili njengokwemboza.Lokhu kuphinde kusetshenziswe njenge-lubricant ngoba kunciphisa ukungqubuzana.Isakhiwo sokubopha se-PTFE sizinzile kakhulu;ngakho-ke, ine-reactivity yamakhemikhali ephansi kanye nephuzu eliphezulu lokubilisa.Ngaphezu kwalokho, ine-conductivity kagesi enhle.i-polymer iyimpahla ye-thermoplastic, okusho ukuthi izakhiwo zayo ziyashintsha lapho ishisa noma ipholile.I-PTFE inazo zonke lezi zakhiwo eziwusizo ngenxa yesakhiwo sayo samangqamuzana.
Uyini umehluko phakathi kweNyiloni ne-PTFE?
• Izakhi zamakhemikhali ezikhona kupolymer yenayiloni yiKhabhoni, iHydrojeni, i-Oxygen, neNitrojeni.i-polymer iqukethe i-Carbon ne-Fluorine kuphela.
• Kokubili inayiloni ne-PTFE kunamandla e-intramolecular, lapho inayiloni ithi “hydrogen bond” futhi eye-polymer ithi “London dispersion forces.”
• I-monomer (iyunithi ephindayo) yenayiloni ithi (-NH--[CH2]5-CO-) kanye neye-PTFE ithi (-F2-CC-F2).
• Inayiloni iyi-hydrophilic material kanti i-PTFE iyi-hydrophobic material.
PS: Xhumana nathi nge-PTFE imikhiqizo eqediwe isampula yamahhala
Isikhathi sokuthumela: May-14-2017