Cov khoom siv polyester

Polyester yog ib qeb ntawmpolymersuas muaj covester pab pawg ua haujlwmnyob rau hauv txhua qhov rov ua dua ntawm lawv cov saw tseem ceeb.Raws li qhov tshwj xeebkhoom, nws feem ntau yog hais txog ib hom hu uapolyethylene terephthalate(PET).Polyesters suav nrog cov tshuaj uas tshwm sim, xws li hauvnroj tsuagthiabkab, as well as synthetics xws lipolybutyrate.Ntuj polyesters thiab ob peb hluavtaws sawv daws yuavbiodegradable, tab sis feem ntau hluavtaws polyesters tsis yog.Synthetic polyesters yog siv dav hauv cov khaub ncaws.

Polyester fibers qee zaum spun ua ke nrog ntuj fibers los tsim ibdaim ntaubnrog cov khoom sib xyaw.Paj rwb-polyester blends tuaj yeem muaj zog, wrinkle- thiab tsim kua muag-resistant, thiab txo shrinking.Synthetic fiberssiv polyester muaj dej siab, cua thiab ib puag ncig tiv thaiv piv rau cov nroj tsuag-derived fibers.Lawv tsawg duahluav taws-resistantthiab tuaj yeem yaj thaum ignited.

Cov kua crystalline polyesters yog cov thawj siv hauv kev lag luamkua siv lead ua polymers.Lawv siv rau lawv cov khoom siv kho tshuab thiab cov cua sov ua haujlwm.Cov cwj pwm no kuj tseem ceeb hauv lawv daim ntawv thov ua lub foob abradable nyob rau hauv dav hlau cav.

Polyesters tshwm sim nyob rau hauv qhov muaj xws li covcutinfeem ntawmcog cuticles, uas muajomega hydroxy acidsthiab lawv cov derivatives, interlinked ntawmesterbonds, tsim polyester polymers ntawm indeterminate loj.Polyesters kuj yog tsim los ntawmmuvhauv genusColletes, uas secrete acellophane-zoo li polyester hauv ob sab phlu rau lawv cov hlwb hauv av tau txais lawv lub npe menyuam yaus "polyester muv".

Nyob ntawm cov qauv tshuaj, polyester tuaj yeem ua tauthermoplasticlos yogntsuas kub.Tseem muajpolyester cobkho los ntawm hardeners;Txawm li cas los xij, feem ntau cov polyesters yog cov thermoplastics.[11]Pab pawg OH raug cuam tshuam nrog ib qhoIsocyanatefunctional compound nyob rau hauv ib tug 2 tivthaiv system ua coatings uas tej zaum yuav xaiv tau pigmented.Polyesters li thermoplastics tuaj yeem hloov cov duab tom qab siv cov cua sov.Thaum combustible ntawm qhov kub thiab txias, polyesters zoo li shrinkage ntawm nplaim taws thiab nws tus kheej tua thaum ignition.Polyester fibers muaj siabsiab tawvthiabE-modulusnrog rau qhov nqus dej tsawg thiab tsawg heevshrinkagenyob rau hauv kev sib piv nrog rau lwm cov muaj fibers.

Ua kom muaj ntxhiab tsw ntawm polyesters nce lawviav hloov kub, melting kub,thermal stability, tshuaj stability, thiab hnyav kuj.

Polyesters kuj tuaj yeem ua tautelechelic cov oligomerszoo li polycaprolactone diol (PCL) thiab polyethylene adipate diol (PEA).Lawv ces siv liprepolymers.