Polyester waa qayb ka mid ahpolymerskuwaas oo ka koobanester koox shaqocutub kasta oo ku celcelin ah oo silsiladdooda ugu weyn ah. Sida gaar ahagab, waxay inta badan tilmaamaysaa nooc la yiraahdopolyethylene terephthalate(PET). Polyesters-ku waxay ka kooban yihiin kiimikooyin dabiici ah, sida kuwa ku jiradhirtaiyocayayaan, iyo sidoo kale walxaha synthetic-ga ah sidapolybutyratePolyester-ka dabiiciga ah iyo dhowr ka mid ah kuwa synthetic-ga ah ayaa ahbaaba'aya, laakiin inta badan polyester-yada macmalka ah maaha. Polyester-yada macmalka ah waxaa si weyn loogu isticmaalaa dharka.
Faybarrada Polyester-ka mararka qaarkood waxaa lagu wareejiyaa fiilooyin dabiici ah si loo soo saaromaroleh sifooyin isku dhafan.Cudbi-Isku-darka polyester-ka wuxuu noqon karaa mid xooggan, laalaab iyo jeexjeex u adkaysta, wuxuuna yareyn karaa yaraanta.Faybarro macmal ahIsticmaalka polyester-ku wuxuu leeyahay iska caabin biyo, dabaylo iyo deegaan oo sarreeya marka loo eego fiilooyinka dhirta laga helo.dab u adkaystawaxayna dhalaali kartaa marka la shido.
Polyester-yada dareeraha ah ee kristalinta ayaa ka mid ah kuwa ugu horreeya ee warshadaha loo isticmaalopolymers dareere ah oo kiristaalo ahWaxaa loo isticmaalaa sifooyinkooda farsamada iyo iska caabbinta kulaylka. Astaamahani sidoo kale waa muhiim marka loo isticmaalo shaabad la jari karo oo ku jirta matoorada diyaaradaha.
Polyesters-ka dabiiciga ah waxaa ka mid ahcutinqayb ka mid ahGooyo dhir ah, kaas oo ka koobanasiidhyada omega hydroxyiyo wax soo saarkooda, oo isku xiran iyada oo loo marayoesterisku xidhka, oo sameeya polymers polyester ah oo cabbir aan la cayimin. Polyesters-ka waxaa sidoo kale soo saarashinnidahiddaha ku jiraKolleetada, kaas oo soo daaya acellophane- dahaarka polyester-ka oo kale ah ee loogu talagalay unugyada digaagga ee dhulka hoostiisa ku jira, taasoo keentay naanays loogu magac daray "shinnida polyester".
Iyadoo ku xiran qaab-dhismeedka kiimikada, polyester-ku wuxuu noqon karaathermoplasticamaheerkulbeegWaxaa sidoo kale jiraResins polyester ahWaxaa daaweeya kuwa adag; si kastaba ha ahaatee, polyester-yada ugu caansan waa thermoplastics.[11]Kooxda OH waxay ka falcelisayIsocyanateIsku-darka shaqeynaya ee nidaamka 2 qaybood ah wuxuu soo saaraa dahaadhyo ikhtiyaari ah oo midab leh. Polyesters-ka oo ah thermoplastics-ka ayaa laga yaabaa inay isbeddelaan qaabka ka dib marka la isticmaalo kulaylka. In kasta oo ay guban karaan heerkulka sare, polyesters-ku waxay u muuqdaan inay ka fogaadaan ololka oo ay is-damiyaan marka la shido. Faybarrada Polyester-ka waxay leeyihiin heer sareadkeysiiyoModulus-ka elektaroonigga ahiyo sidoo kale nuugista biyaha oo yar iyo ugu yaraanyaraanshomarka la barbar dhigo fiilooyinka kale ee warshadaha.
Kordhinta walxaha udgoon ee polyester-ka waxay kordhisaa cufnaanta maqaarkaheerkulka kala-guurka galaaska, heerkulka dhalaalka,xasilloonida kulaylka, xasilloonida kiimikada, iyo iska caabbinta dareeraha.
Polyesters-ka ayaa sidoo kale laga samayn karaatelechelic oligomerssida polycaprolactone diol (PCL) iyo polyethylene adipate diol (PEA). Kadib waxaa loo isticmaalaa sidaprepolymers-ka.
Waqtiga boostada: Diseembar-06-2022