1. Ihe nke wiil polyurethane dị nro dị nro, na-enwe ezigbo nkwụsị esemokwu na obere mkpọtụ;ebe wiil nylon siri ike, na nguzogide esemokwu ha dịtụ iche na nke polyurethane.Dịka ọmụmaatụ, uwe ndị e ji naịlọn mee na-adịghịkwa eyi.
2. Ihe nke wheel polyurethane na nylon wheel dị iche iche.A na-emepụta polyurethane site na isocyyanates (monomers) na ogige hydroxyl.N'ihi otu polar carbamate siri ike, nke a na-apụghị imeri emeri na ndị na-abụghị ndị polar, ọ nwere mma mmanu mmanu mmanu, siri ike, na-eyi nguzogide, iguzogide ịka nká na adhesion.Enwere ike ịkwadebe ihe dị mma maka oke okpomọkụ (-50 ruo 150 ° C) site na ngwa ngwa dị iche iche, gụnyere elastomers, thermoplastic resins na resins thermosetting.Ọ dịghị eguzogide hydrolysis na elu okpomọkụ, ma ọ bụ alkaline ọkara.Naịlọn bụ okwu n'ozuzu maka polymers nwere otu amide na nkeji ugboro nke agbụ macromolecular.Enwere ike ịkwadebe polyamides site na polymerization imeghe mgbanaka nke lactams, ma ọ bụ site na polycondensation nke diamines na dibasic acid.
Oge nzipu: Dec-23-2022