Ipolyester luhlobo lweiipholimaeziqulathe iester iqela elisebenzayokwiyunithi nganye ephindayo yekhonkco labo eliphambili.Ngokukodwaimpahla, idla ngokubhekisa kuhlobo olubizwa ngokuba yii-polyethylene terephthalate(PET).Iipolyesters ziquka iikhemikhali zendalo, ezifana ne-inizityalokwayeizinambuzane, kunye nezinto zokwenziwa ezifanapolybutyrate.Iipolyester zendalo kunye nezimbalwa zokwenziwai-biodegradable, kodwa iipolyester ezininzi zokwenziwa azikho.Iipolyester zokwenziwa zisetyenziswa kakhulu kwiimpahla.
Iintsinga zePolyester ngamanye amaxesha zijijwa kunye nemisonto yendalo ukuvelisa ailaphuezineempawu ezixutyiweyo.Umqhaphu-i-polyester blends ingaba namandla, imibimbi- kunye ne-resistant-resistant-resistant, kunye nokunciphisa ukucutheka.Iintsinga zokwenziwausebenzisa i-polyester inamanzi aphezulu, umoya kunye nokumelana nokusingqongileyo xa kuthelekiswa nemicu yezityalo.Bancinciukumelana nomlilokwaye inokunyibilika xa ibasiwe.
Iipolyester zekristale ezilulwelo ziphakathi kwezokuqala ezisetyenziswa kwimizi-mvelisoiipholima zekristale elulwelo.Zisetyenziselwa iipropati zabo zomatshini kunye nokumelana nokushisa.Ezi mpawu zikwabalulekile kwisicelo sazo njengetywina elinokuchithwa kwiinjini zejethi.
Iipolyester ezenzeka kwindalo ziqukacutininxalenye yeisityalo se-cuticles, equkai-omega hydroxy acidskunye nezinto eziphuma kuzo, ezidityaniswe ngeesteriibhondi, ukwenza iipolymers ze-polyester zobukhulu obungenasiphelo.Iipolyester nazo ziveliswa yiiinyosikwi-genusIiColletes, efihla ai-cellophane-ezifana ne-polyester efakwe kwiiseli zabo ze-brood eziphantsi komhlaba ezibenza banikwe igama lesiteketiso "iinyosi ze-polyester".
Ngokuxhomekeke kwisakhiwo sekhemikhali, i-polyester ingaba athermoplasticokanyethermoset.Kukho kwakhonaiintlazi zepolyesterunyangwa ngabaqina;nangona kunjalo, iipolyester eziqhelekileyo zi-thermoplastics.[11]Iqela le-OH liphendulwa ngeI-Isocyanateikhompawundi esebenzayo kwisixokelelwano secandelo eli-2 elivelisa iingubo ezinokukhethwa ukuba zibe nebala.Iipolyester njenge thermoplastics zinokutshintsha imilo emva kokusetyenziswa kobushushu.Ngelixa zivutha kumaqondo obushushu aphezulu, iipolyester zithande ukucutheka kude namadangatye kwaye zizicime xa zivutha.Iintsinga zepolyester ziphezuluukunyamezelakwayeE-moduluskunye nokufunxa kwamanzi aphantsi kunye nokuncinciukushwabanaxa kuthelekiswa nezinye iintsinga zamashishini.
Ukwandisa iindawo ezinevumba elimnandi zepolyester kwandisa zaboiglasi utshintsho lobushushu, ubushushu bokunyibilika,ukuzinza kwe-thermal, ukuzinza kweekhemikhali, kunye nokumelana ne-solvent.
Iipolyesters nazo zinokubatelechelic iioligomersnjenge-polycaprolactone diol (PCL) kunye ne-polyethylene adipate diol (PEA).Ziye zisetyenziswe njengeiipolymers.
Ixesha lokuposa: Dec-06-2022