Polyethylene terephthalate. Formula y'ibinyabutabire ni -OCH2-CH2OCOC6H4CO- Izina ry'Icyongereza: polyethylene terephthalate, mu magambo ahinnye nka PET, ni polymeri nyinshi, ikomoka ku buryo ethylene terephthalate ikora amazi menshi. Ethylene terephthalate iboneka binyuze mu buryo bwo gupima aside terephthalate na ethylene glycol. PET ni polymeri y'umweru cyangwa umuhondo woroshye, ifite ubuso bworoshye kandi burabagirana. Ifite imiterere myiza y'umubiri n'iy'ikoranabuhanga mu bushyuhe bwinshi. Ubushyuhe bukoreshwa igihe kirekire bushobora kugera kuri 120°C. Ubushyuhe bw'amashanyarazi ni bwiza cyane. Nubwo haba hari ubushyuhe bwinshi n'umuvuduko mwinshi, imiterere yayo y'amashanyarazi iracyari myiza, ariko ubushobozi bwayo bwo kurwanya corona buragabanuka. Ubushobozi bwo kurwanya umuvuduko, kurwanya umunaniro, kurwanya gushwanyagurika, no kudahinduka kw'ibipimo byose ni byiza cyane.
inyungu
1, ifite imiterere myiza ya mekanike, imbaraga zayo zo gukubita ni inshuro 3-5 z'izindi filime, kandi ubushobozi bwo kuzingira ni bwiza.
2, irwanya amavuta, ibinure, aside igabanya ubukana, alkali igabanya ubukana, n'ibindi byinshi mu biyungurura.
3, ifite ubushobozi bwo kurwanya ubushyuhe buri hejuru n'ubuke. Ishobora gukoreshwa igihe kirekire mu bushyuhe bwa 120℃, kandi ishobora kwihanganira ubushyuhe buri hejuru bwa 150℃ n'ubushyuhe buri hasi bwa -70℃ mu gihe gito, kandi imiterere y'ubushyuhe buri hejuru n'ubuke bigira ingaruka nke.
4, umwuka wa gaze n'amazi ni bike cyane, ni ukuvuga ko ifite ubushobozi bwo kurwanya gaze, amazi, amavuta n'impumuro mbi.
5, urumuri rwinshi, rushobora kubuza imirasire ya ultraviolet, rukagira urumuri rwiza.
6, ntabwo ari uburozi, nta buryohe, isuku n'umutekano, bishobora gukoreshwa mu buryo butaziguye mu gupfunyika ibiryo.
PET ni polymer y'umweru cyangwa umuhondo woroshye cyane ifite ubuso bworoshye kandi burabagirana. Irwanya gukururuka neza, irwanya umunaniro, irwanya gukururana no kudahinduka, ifite ubukana buke kandi ikomeye, ifite ubukana buke kandi ikomeye, ifite ubukana bwinshi mu bikoresho bya thermoplastic: irinda amashanyarazi neza, ifite ingaruka nke ku bushyuhe, ariko irwanya corona. Ubushyuhe, irwanya ikirere, irwanya imiti, irwanya amazi make, irwanya aside nke n'ibintu bihumanya ikirere, ariko ntibyinjizwa mu mazi ashyushye na alkali. Resin ya PET ifite ubushyuhe bwinshi bwo guhindura ikirahure, umuvuduko wo gukurura kristalo buhoro, ihindagurika rirerire, ihindagurika rirerire, ihindagurika rirerire, ihindagurika rirerire, kandi irwanya ubushyuhe buke. Binyuze mu kunoza igikoresho cya nucleating, igikoresho cya crystallization n'imbaraga zo kongeramo fibre y'ikirahure, PET ifite ibi bikurikira uretse imiterere ya PBT:
1, ubushyuhe bwo guhindura ubushyuhe n'ubushyuhe bwo gukoreshwa igihe kirekire ni byo biri hejuru mu bikoresho rusange bikoreshwa muri thermoplastic.
2, kubera ko idashobora gushyuha cyane, PET yongerewe imbaraga yinjizwa mu bwogero bwa solder kuri 250°C mu gihe cy'amasegonda 10, kandi hafi ya yose ntahinduka ibara. Ikwiriye cyane cyane mu gutegura ibice by'ikoranabuhanga n'amashanyarazi byasolderwe.
3, imbaraga zo kunama ni 200Mpa, modulus ya elastic ni 4000Mpa, ubushobozi bwo gucika no kwihanganira umunaniro nabyo ni byiza cyane, ubukana bw'ubuso buri hejuru, kandi imiterere ya mekanike isa na pulasitiki zikoresha thermosetting.
4, kubera ko ethylene glycol ikoreshwa mu gukora PET ari hafi kimwe cya kabiri cy'igiciro cya butylene glycol ikoreshwa mu gukora, PET resin na PET ishyigikiwe ni byo bihendutse cyane mu bikoresho bya pulasitiki kandi bifite imikorere ihenze cyane.