I-polyester iyisigaba seama-polymerseziquketheester iqembu elisebenzayokuwo wonke amayunithi aphindayo weketango lawo eliyinhloko.Njengoba ethizeimpahla, ngokuvamile libhekisela ohlotsheni olubizwa ngokuthii-polyethylene terephthalate(PET).Ama-polyester afaka amakhemikhali emvelo, afana ne-inizitshalofuthiizinambuzane, kanye nama-synthetics afanai-polybutyrate.Ama-polyester emvelo kanye nama-synthetic ambalwai-biodegradable, kodwa ama-polyester amaningi okwenziwa awekho.Ama-polyester okwenziwa asetshenziswa kakhulu ezingutsheni.
Imicu ye-polyester ngezinye izikhathi iphothwa kanye nemicu yemvelo ukuze kukhiqizwe aindwangungezakhiwo ezihlanganisiwe.Ukotini-ingxube ye-polyester ingaba namandla, imibimbi futhi imelane nezinyembezi, futhi inciphise ukuncipha.Imicu yokwenziwausebenzisa i-polyester banamanzi aphezulu, umoya kanye nokumelana nemvelo uma kuqhathaniswa nemicu yezitshalo.Bancaneukumelana nomlilofuthi ingancibilika lapho kubasiwe.
Ama-polyester angama-crystalline angama-Liquid aphakathi kwezindawo zokuqala ezisetshenziswa ezimboniniama-polymer e-crystal liquid.Zisetshenziselwa izakhiwo zazo zemishini kanye nokumelana nokushisa.Lezi zici nazo zibalulekile ekusebenziseni kwazo njengophawu olubambekayo ezinjinini zejethi.
Ama-polyester avela emvelweni afaka phakathicutiningxenye yeizitshalo ze-cuticles, ehlanganisai-omega hydroxy acidkanye nokuphuma kwazo, kuxhunywe ngeesteramabhondi, okwenza ama-polymers e-polyester osayizi ongapheli.Ama-polyester nawo akhiqizwaizinyosiohlotsheniAmaqoqo, ezifihla ai-cellophane-efana nolwelwesi lwe-polyester lwamaseli abo angaphansi komhlaba okwenza aqanjwe ngokuthi "izinyosi ze-polyester".
Kuye ngesakhiwo samakhemikhali, i-polyester ingaba ai-thermoplasticnomai-thermoset.Kukhona futhiama-polyester resinsukwelashwa ngama-hardeners;Nokho, ama-polyester avame kakhulu ama-thermoplastics.[11]Iqembu le-OH liphendulwa ngokuthiIsocyanateinhlanganisela esebenzayo ohlelweni lwezingxenye ezi-2 ezikhiqiza ukunamathela okungakhethwa kube nemibala.Ama-polyester njengama-thermoplastics angashintsha umumo ngemva kokusetshenziswa kokushisa.Nakuba evutha emazingeni okushisa aphezulu, ama-polyester avame ukushwabana amalangabi futhi azicime lapho evutha.Imicu ye-polyester iphezuluukuqinafuthiE-moduluskanye nokumuncwa kwamanzi aphansi kanye nokuncaneukunciphauma kuqhathaniswa neminye imicu yezimboni.
Ukwandisa izingxenye ezinamakha ama-polyester kwandisaizinga lokushisa lokushintsha kwengilazi, izinga lokushisa elincibilikayo,ukuzinza okushisayo, ukuzinza kwamakhemikhali, nokumelana ne-solvent.
Ama-polyester nawo angabatelechelic ama-oligomersnjenge-polycaprolactone diol (PCL) kanye ne-polyethylene adipate diol (PEA).Bese zisetshenziswa njengeama-prepolymers.
Isikhathi sokuthumela: Dec-06-2022