Menene resin thermosetting?
Resin thermosetting ko resin thermosetting shine polymer da aka warke ko siffata zuwa siffa mai wuya ta amfani da hanyoyin warkewa kamar dumama ko radiation.Tsarin warkewa tsari ne da ba za a iya juyawa ba.Yana ƙetare hanyar sadarwa ta polymer ta hanyar haɗin sinadarai na covalent.
Bayan dumama, kayan aikin thermoset ɗin ya kasance da ƙarfi har sai zafin jiki ya kai zafin da ya fara raguwa.Wannan tsarin ya saba wa na robobi na thermoplastic.Misalai da yawa na resins na thermosetting sune:
Fenolic guduro
- Amino ruwa
- Gudun polyester
- Gudun silicone
- Epoxy resin, kuma
- Gudun polyurethane
Daga cikin su, resin epoxy ko phenolic guduro yana ɗaya daga cikin resins na thermosetting na yau da kullun.A zamanin yau, ana amfani da su sosai a cikin aikace-aikacen kayan gini da na musamman.Saboda tsananin ƙarfinsu da taurin kai (saboda babban haɗin giciye), sun kusan dacewa da kowane aikace-aikacen.
Menene manyan nau'ikan resin epoxy da ake amfani da su a cikin kayan haɗin gwiwa?
Manyan nau'ikan nau'ikan resin epoxy guda uku da ake amfani da su a aikace-aikacen kayan haɗin gwiwa sune:
- Phenolic aldehyde glycidyl ether
- Aromatic glycidyl amin
- Cyclic aliphatic mahadi
Menene mahimman kaddarorin resin epoxy?
Mun jera a ƙasa mahimman kaddarorin da guduro epoxy ya samar.
- Babban ƙarfi
- Ƙananan raguwa
- Yana da kyau adhesion zuwa daban-daban substrates
- Insulancin lantarki mai inganci
- Chemical juriya da sauran ƙarfi juriya, kazalika
- Ƙananan farashi da ƙarancin guba
Epoxy resins suna da sauƙin warkewa kuma sun dace da yawancin abubuwan da ake amfani da su.Suna da sauƙi don jika saman kuma sun dace musamman don aikace-aikacen kayan haɗin gwiwa.Hakanan ana amfani da resin Epoxy don gyara polymers da yawa, kamar polyurethane ko polyester mara saturated.Suna haɓaka halayensu na zahiri da sinadarai.Don resin epoxy na thermosetting:
- Matsakaicin ƙarfin ƙarfi daga 90 zuwa 120MPa
- Matsakaicin matsakaicin ƙarfin ƙarfi shine 3100 zuwa 3800MPa
- Matsakaicin zafin jiki na gilashin (Tg) shine 150 zuwa 220 ° C
Epoxy resin yana da babban koma baya guda biyu, wato brittleness da hankali na ruwa.
Lokacin aikawa: Janairu-29-2024
