1. Impahla yamasondo e-polyurethane ithambile ngokuqhathaniswa, inokumelana okuhle nokungqubuzana nomsindo ophansi;kuyilapho amasondo enayiloni eqinile ngokuqhathaniswa, futhi ukumelana kwawo nokungqubuzana kuhluke kancane kulokho kwe-polyurethane.Isibonelo, izingubo ezenziwe ngenayiloni nazo azigugi.
2. Izinto zamasondo e-polyurethane namasondo enayiloni zihlukile.Ama-polyurethanes enziwe nge-polymerized kusuka kuma-isocyanates (ama-monomers) nama-hydroxyl compounds.Ngenxa yeqembu eliqinile le-polar carbamate, elingancibiliki emaqenjini angewona ama-polar, linokumelana okuhle kwamafutha, ukuqina, ukumelana nokugqoka, ukumelana nokuguga nokunamathela.Izinto ezilungele izinga lokushisa elibanzi (-50 kuya ku-150 ° C) zingalungiswa ngezinto ezingavuthiwe ezihlukene, okuhlanganisa ama-elastomers, ama-thermoplastic resins nama-thermosetting resins.Ayimelani ne-hydrolysis ekushiseni okuphezulu, noma ku-alkaline medium.Inayiloni igama elivamile lama-polymers aqukethe amaqembu e-amide kuyunithi ephindayo yeketango eliyinhloko le-macromolecular.I-Polyamides ingalungiswa ngokuvula i-polymerization ye-lactam, noma nge-polycondensation yama-diamine nama-dibasic acid.
Isikhathi sokuthumela: Dec-23-2022