1. Abubuwan ƙafafun polyurethane suna da laushi mai laushi, tare da juriya mai kyau da ƙananan amo;yayin da ƙafafun nailan ke da wuyar gaske, kuma juriyarsu ta ɗan bambanta da na polyurethane.Misali, tufafin da aka yi da nailan suma suna da juriya.
2. Abubuwan ƙafafun polyurethane da ƙafafun nailan sun bambanta.Polyurethane suna polymerized daga isocyanates (monomers) da mahaɗan hydroxyl.Saboda ƙungiyar carbamate mai ƙarfi mai ƙarfi, wanda ba a iya narkewa a cikin ƙungiyoyin da ba na iyakacin duniya ba, yana da juriya mai kyau, tauri, juriya, juriya na tsufa da mannewa.Za a iya shirya kayan da suka dace da kewayon zafin jiki mai faɗi (-50 zuwa 150 ° C) daga albarkatun ƙasa daban-daban, gami da elastomers, resins na thermoplastic da resins na thermosetting.Ba shi da juriya ga hydrolysis a babban zafin jiki, ko matsakaicin alkaline.Naylon kalma ce ta gabaɗaya don polymers masu ɗauke da ƙungiyoyin amide a cikin sashin maimaitawa na babban sarkar macromolecular.Ana iya shirya polyamides ta hanyar buɗe-ƙarshen polymerization na lactams, ko ta polycondensation na diamines da acid dibasic.
Lokacin aikawa: Dec-23-2022