Polyester bụ ụdị nkepolimanke nwereester otu ọrụna nkeji mmegharị ọ bụla nke isi agbụ ha.ihe, ọ na-ezo akakarị n'ụdị a na-akpọpolyethylene terephthalate(PET). Polyesters gụnyere kemịkalụ ndị sitere n'okike, dịka naosisinaụmụ ahụhụyana ihe ndị sịntetik dị kapolibutyrateE ji polyester eke na ụfọdụ sịntetik mee ya.nke nwere ike ire ere, mana ọtụtụ polyester sịntetik abụghị. A na-ejikarị polyester sịntetik eme ihe n'uwe.
Mgbe ụfọdụ, a na-ejikọta eriri polyester na eriri eke iji mepụtaákwàyana ihe ndị e ji agwakọta agwakọta.Owu-ngwakọta polyester nwere ike ịdị ike, na-egbochi mkpụkọ ma na-egbochi anya mmiri, ma na-ebelata mkpụkọ.Eriri sịntetikIji polyester nwere oke mmiri, ifufe na gburugburu ebe obibi ma e jiri ya tụnyere eriri sitere na osisi. Ha pere mpe.na-anaghị eguzogide ọkụma nwee ike ịgbaze mgbe ọkụ gbanyere ya.
Polyester kristal mmiri mmiri so na ndị mbụ e ji eme ihe n'ụlọ ọrụ mmepụta ihepolima kristal mmiri mmiriA na-eji ha maka ihe ndị dị na igwe ha na iguzogide okpomọkụ. Àgwà ndị a dịkwa mkpa n'ọrụ ha dị ka ihe mkpuchi a na-apụghị ịgbagha agbagha na injin jet.
Polyesters ndị dị n'ime okike gụnyerecutinakụkụ nkemkpụrụ osisi, nke mejupụtaraomega hydroxy asịdna ihe ndị ha na-emepụta, jikọtara ọnụ site naesternjikọ, na-emepụta polima polyester nke nha a na-amaghị ama. A na-emepụtakwa polyesters site naaṅụn'ime ụdịdị ahụNdị Kọletị, nke na-ezochicellofon- ihe mkpuchi dị ka polyester maka mkpụrụ ndụ ha dị n'okpuru ala nke mere ka ha nwee aha a na-akpọ "polyester bees".
Dabere na usoro kemịkalụ, polyester nwere ike ịbụthermoplasticma ọ bụthermosetE nwekwararesin polyesterA na-agwọ ha site na ihe ndị siri ike; agbanyeghị, polyester kachasị ewu ewu bụ thermoplastics.[11]A na-emeghachi omume na otu OHIsocyanateihe mejupụtara arụ ọrụ n'ime sistemụ ihe abụọ na-emepụta mkpuchi nke nwere ike ịbụ agba. Polyesters dị ka thermoplastics nwere ike ịgbanwe ọdịdị ya mgbe ejiri okpomọkụ mee ihe. Ọ bụ ezie na ọ na-ere ọkụ na okpomọkụ dị elu, polyesters na-agbada site na ọkụ ma na-agbanyụ onwe ha mgbe agbanyere ọkụ. Eriri polyester nwere nnukwuikenaE-moduluyana obere mmiri na-amịkọrọ na oberembelatama e jiri ya tụnyere eriri ụlọ ọrụ ndị ọzọ.
Ịba ụba ihe na-esi ísì ụtọ nke polyester na-eme ka ha dịkwuo mmaokpomọkụ mgbanwe iko, okpomọkụ agbaze,nkwụsi ike nke okpomọkụ, nkwụsi ike kemịkalụ, na iguzogide ihe mgbaze.
Ọzọkwa, e nwere ike iji polyesters mee ihetelechelik ndị oligomersdị ka polycaprolactone diol (PCL) na polyethylene adipate diol (PEA). A na-eji ha eme ihe dị kandị na-emepụta prepolymers.
Oge ozi: Disemba-06-2022