Polyester waa qayb ka mid ahpolymersoo ka koobanester kooxda shaqaynaysacutub kasta oo soo noqnoqda ee silsiladooda ugu weyn.Sida gaar ahmaaddo, waxay inta badan tilmaamaysaa nooca loo yaqaanterephthalate polyetylen(PET).Polyester-yada waxaa ka mid ah kiimikooyin dabiici ah, sida gudahadhirtaiyocayayaanka, iyo sidoo kale synthetics sidapolybutyrate.Polyester-ka dabiiciga ah iyo kuwo yar oo synthetic ah ayaa ahnoolayn karo, laakiin inta badan polyester-ka synthetic maaha.Polyester-ka synthetic waxaa si weyn loogu isticmaalaa dharka.
Fiilooyinka Polyester-ka ayaa mararka qaarkood la isku miiqayaa fiilooyinka dabiiciga ah si ay u soo saaraan amarooo leh hanti isku dhafan.CudbiIsku darka polyester-ku wuxuu noqon karaa mid xoog badan, laalaab- iyo jeexjeexa u adkaysta, waxayna yareeyaan hoos u dhaca.Fiilooyinka syntheticIsticmaalka polyester-ka waxay leeyihiin biyo sare, dabaysha iyo iska caabbinta deegaanka marka loo eego fiilooyinka ka soo jeeda dhirta.Way ka yar yihiindabka u adkaystaoo dhalaali kara marka la shido.
Polyesters crystalline dareere ah ayaa ka mid ah kuwa ugu horreeya ee warshad ahaan loo isticmaalopolymers crystal dareere ah.Waxa loo isticmaalaa sifadooda makaanikada iyo u adkaysiga kulaylka.Sifooyinkan ayaa sidoo kale muhiim u ah codsigooda sida shaabad la taaban karo ee matoorada jetka.
Polyester-ka ku dhaca dabeecadda waxaa ka mid ahcutinqayb ka mid ahgoynta dhirta, oo ka koobanomega hydroxy acidsiyo asalkooda, isku xidhan viaesterbonds, samaynta polymers polyester ee cabbirka aan la cayimin.Polyester-ka waxaa sidoo kale soo saarashinniee hiddahaColletes, kaas oo sirta acellophane- sida dahaarka polyester-ka ee unugyadooda dhulka hoostiisa ah taasoo kasbaday naaneyska "Bees polyester".
Iyada oo ku xidhan qaabka kiimikada, polyesterku wuxuu noqon karaa aheerkulbeeggaamaheerkulbeegga.Waxaa kaloo jirasuufka poliesterkawaxaa lagu daaweeyaa qallajiyeyaasha;si kastaba ha ahaatee, polyester-yada ugu caansan waa thermoplastics.[11]Kooxda OH waxaa looga falceliya aIsocyanatexarun shaqaynaysa oo ah nidaam ka kooban 2 qaybood oo soo saara dahaar kaas oo si ikhtiyaari ah loo midabayn karo.Polyester-yada heerkulbeegga ayaa laga yaabaa inay qaab beddelaan ka dib marka la isticmaalo kuleylka.Iyadoo ay gubanayso heerkulka sare, polyester-yadu waxay u muuqdaan inay ka fogaadaan ololka oo ay is-dejiyaan marka ay shidaan.Fiber polyester-ka ayaa leh heer sareadkeysiiyoE-moduliyo sidoo kale nuugista biyaha oo hooseeya oo ugu yaryaraynmarka la barbardhigo fiilooyinka warshadaha kale.
Kordhinta qaybaha udgoonka ee polyester-yada waxay kordhisaa iyagaheerkulka kala guurka galaasheerkulka dhalaalka,xasilloonida kulaylka, xasiloonida kiimikada, iyo caabbinta dareeraha.
Polyester-ka ayaa sidoo kale noqon karatelechelic oligomersSida diol polycaprolactone (PCL) iyo polyetylen adipate diol (PEA).Kadibna waxaa loo isticmaalaa sidiiprepolymers.
Waqtiga post: Dec-06-2022