Polyester bụ ụdị nkepolymersnke nwere iheester otu ọrụna ọ bụla ikwugharị unit ha isi yinye.Dị ka kpọmkwemihe, ọ na-ezokarị aka n'ụdị a na-akpọpolyethylene terephthalate(PET).Polyesters na-agụnye kemịkalụ sitere n'okike, dị ka n'imeosisinaụmụ ahụhụ, yana sịntetik dị kapolybutyrate.Polyesters eke na ihe ole na ole sịntetik bụbiodegradable, ma ọtụtụ polyester sịntetik abụghị.A na-eji polyester sịntetị mee ihe nke ukwuu na uwe.
A na-atụkọta eriri polyester mgbe ụfọdụ yana eriri eke iji mepụta aakwana agwakọta agwa.OwuNgwakọta polyester nwere ike ịdị ike, mgbakasị na-eguzogide mmiri, ma belata mbelata.Eriri sịntetikiji polyester nwere nnukwu mmiri, ikuku na nguzogide gburugburu ebe obibi tụnyere eriri ndị sitere na osisi.Ha dị obereọkụ na-eguzogidema nwee ike gbazee mgbe agbanyere ọkụ.
Liquid crystalline polyesters so na nke mbụ eji arụ ọrụmmiri mmiri kristal polymers.A na-eji ha eme ihe maka ihe eji arụ ọrụ na-eguzogide okpomọkụ.Àgwà ndị a dịkwa mkpa na ngwa ha dị ka akara a na-apụghị ịgbagha agbagha na engines jet.
Polyesters na-eme na okike gụnyerecutinakụrụngwa nkecuticles osisi, nke mejupụtaraomega hydroxy acidna usoro ha, jikọtara site naesteragbụ, akpụ polyester polymers nke indeterminate size.A na-emepụtakwa polyester site naaṅụna genusNdị nchịkọta, nke na-ezo acellophane-dị ka polyester lining maka mkpụrụ ndụ nwa ha dị n'okpuru ala na-enweta ha aha otutu "aṅụ polyester".
Dabere na usoro kemịkalụ, polyester nwere ike ịbụ athermoplasticma ọ bụthermoset.E nwekwarapolyester resinsgwọchara site na harddeners;Otú ọ dị, polyester ndị a na-ahụkarị bụ thermoplastics.[11]A na-emeghachi ndị otu OH na otuIsocyanateNgwakọta na-arụ ọrụ na sistemu akụrụngwa 2 na-emepụta mkpuchi nke nwere ike ịme pigmenti na nhọrọ.Polyesters dị ka thermoplastics nwere ike ịgbanwe ọdịdị mgbe etinyere okpomọkụ.Ọ bụ ezie na ọkụ na-ekpo ọkụ na okpomọkụ dị elu, polyesters na-emekarị ka ọ ghara ịdaba na ọkụ ma na-emenyụ onwe ya mgbe ọkụ.Polyester fibers nwere nnukwuobi ikenaE-modulyana ntinye mmiri dị ala na ntakịrịmbelatatụnyere ndị ọzọ ulo oru emep uta eri.
Ịbawanye akụkụ aromatic nke polyesters na-abawanye haiko mgbanwe okpomọkụokpomọkụ na-agbaze,nkwụsi ike thermal, kemịkalụ kwụsie ike, na ihe mgbaze.
Polyesters nwekwara ike ịbụtelechelic ndị oligomerDị ka polycaprolactone diol (PCL) na polyethylene adipate diol (PEA).A na-eji ha eme iheprepolymers.
Oge nzipu: Dec-06-2022