1. Cov khoom ntawm polyurethane log yog qhov muag muag, nrog kev sib txhuam zoo thiab tsis muaj suab nrov;thaum nylon log yog qhov nyuaj, thiab lawv cov kev sib txhuam tsis sib haum yog me ntsis txawv ntawm polyurethane.Piv txwv li, cov khaub ncaws ua los ntawm nylon kuj hnav-resistant.
2. Cov ntaub ntawv ntawm polyurethane log thiab nylon log yog txawv.Polyurethanes yog polymerized los ntawm isocyanates (monomers) thiab hydroxyl compounds.Vim muaj zog polar carbamate pawg, insoluble nyob rau hauv non-polar pawg, nws muaj zoo roj kuj, toughness, hnav tsis kam, laus kuj thiab adhesion.Cov ntaub ntawv tsim nyog rau ntau qhov kub thiab txias (-50 txog 150 ° C) tuaj yeem npaj los ntawm cov khoom siv sib txawv, suav nrog elastomers, thermoplastic resins thiab thermosetting resins.Nws tsis tiv taus hydrolysis ntawm qhov kub thiab txias, los yog alkaline nruab nrab.Nylon yog ib lub ntsiab lus dav dav rau cov polymers uas muaj cov pab pawg amide nyob rau hauv chav tsev rov ua dua ntawm cov saw hlau macromolecular.Polyamides tuaj yeem npaj tau los ntawm lub nplhaib-qhib polymerization ntawm lactams, lossis los ntawm polycondensation ntawm diamines thiab dibasic acids.
Post lub sij hawm: Dec-23-2022