1. Thepa ea mabili a polyurethane e batla e le bonolo, e na le khanyetso e ntle ea likhohlano le lerata le tlase;ha mabili a nylon a batla a le thata, 'me ho hanyetsa ha bona ho fapane hanyenyane le polyurethane.Ka mohlala, liaparo tse entsoeng ka nylon le tsona ha li senyehe.
2. Lisebelisoa tsa mabili a polyurethane le mabili a nylon li fapane.Polyurethanes e entsoe ka polymerized ho tloha ho isocyanates (monomers) le metsoako ea hydroxyl.Ka lebaka la sehlopha se matla sa polar carbamate, se ke keng sa qhibiliha ka lihlopha tse seng tsa polar, se na le ho hanyetsa oli e ntle, ho ba thata, ho hanyetsa ho apara, ho hanyetsa botsofali le ho khomarela.Lisebelisoa tse loketseng mocheso o pharaletseng (-50 ho ea ho 150 ° C) li ka lokisoa ho tloha lihlahisoa tse sa tšoaneng tse tala, ho akarelletsa le elastomers, resin thermoplastic le thermosetting resin.Ha e hanyetsane le hydrolysis ka mocheso o phahameng, kapa ho alkaline medium.Nylon ke lentsoe le akaretsang bakeng sa lipolima tse nang le lihlopha tsa amide karolong e pheta-phetoang ea ketane e kholo ea macromolecular.Polyamides e ka lokisoa ka polymerization ea ring-opening ea lactam, kapa ka polycondensation ea diamine le dibasic acid.
Nako ea poso: Dec-23-2022