1. Izinto zamavili e-polyurethane zithambile, zinokuxhathisa okulungileyo kunye nengxolo ephantsi;ngelixa amavili enayiloni eqinile, kwaye ukuxhathisa ukukhuhlana kwawo kwahluke kancinane kulowo we-polyurethane.Umzekelo, iimpahla ezenziwe ngenayiloni nazo azinxibi.
2. Izinto eziphathekayo zamavili e-polyurethane kunye namavili e-nylon zihluke.Iipolyurethanes zenziwe ipolymerized ukusuka kwi-isocyanates (monomers) kunye ne-hydroxyl compounds.Ngenxa yeqela eliqinileyo le-polar carbamate, elingenakunyibilika kumaqela angekho kwi-polar, inokumelana neoli efanelekileyo, ukuqina, ukunyamezela, ukuguga kunye nokubambelela.Izinto eziphathekayo ezifanelekileyo kwiqondo lokushisa elibanzi (-50 ukuya kwi-150 ° C) zinokulungiswa kwizinto eziluhlaza ezahlukeneyo, kuquka i-elastomers, i-thermoplastic resins kunye ne-thermosetting resins.Ayinakumelana ne-hydrolysis kwiqondo lokushisa eliphezulu, okanye kwi-alkaline medium.Inayiloni ligama eliqhelekileyo leepolima eziqulethe amaqela e-amide kwiyunithi ephindayo yekhonkco eliphambili le-macromolecular.Iipolyamides zinokulungiswa ngokuvula i-polymerization ye-lactam, okanye nge-polycondensation ye-diamines kunye ne-dibasic acids.
Ixesha lokuposa: Dec-23-2022