Magaca wax soo saarka:polyurethane

Qaab dhismeedka molos-ka ee wax soo saarka:

Guryaha kiimikada:

Polyuretranes waxaa markii ugu horreysay la soo saaray oo ay baarayeen Dr. Otto Bayer sanadkii 1937. Polyuthane waa poly pommer-ka kaas oo ay ka kooban tahay urethane Mefaele. Urethanes waa astaamaha aashitada carbamic ee jira oo keliya qaab dhismahooda [15]. Faa'iidada ugu weyn ee PU waa in silsiladu aysan ka koobnayn si gaar ah atomka kaarboon-ka-baxa laakiin halkii ay ka heystaan ​​heterameateatems, oksijiinka, kaarboon iyo nitrogen [4]. Codsiyada warshadaha, xarun polyhydroxyl ayaa la isticmaali karaa. Sidoo kale, xeryahooda nitrogen ee poly-shaqeeya ayaa loo isticmaali karaa isku xirka ee ansaxa. Beddelka iyo kala duwanaanta polyhyhydroxyl iyo xeryahooda nitrogen-ka ee polyfen-ka, malaxyada kaladuwan ayaa la qiyaasi karaa [15]. Polyester ama polyerd ressins oo ay kujiraan kooxaha hydroxyl waxaa loo isticmaalaa in lagu soo saaro polyesteror polyther-pus, siday u kala horreeyaan [6]. Isbeddellada tirada beddelka iyo kala duwanaanta inta u dhaxaysa iyo dhex-dhexaadka muddaha laanta waxay soo saaraan malax u dhexeeya xariiqda toosan ee la jajaban yahay iyo 9 ay macquul yihiin inay adag yihiin. Toosan oo toosan ayaa loo isticmaalaa soo saarista fiilooyinka iyo wasaqda (6]. Pus dabacsan ayaa loo isticmaalaa soo saarista wakiilada xidhitaanka iyo jaakadaha [5]. Duub dabacsan oo adag oo loo yaqaan balaastigyo, oo ka kooban inta badan mala-awaalku, waxaa laga heli karaa qaabab kala duwan oo warshadaha ah [7]. Isticmaalka propolumalier-ka weyn ee Molecular, oo kala duwan oo laga soo saari karo copolym-ka Copolymy-ga Kooxda 'terrinal hydroxyl' waxay u oggolaaneysaa baloogyo kale oo kale, oo loo yaqaan qaybo, in lagu geliyo silsiladda PE. Kala duwanaanshaha qaybahaan ayaa keenaya heerar kala duwan oo ah xoogga khasabka ah iyo bahalnimada. Blocks oo bixiya wejiga crystalline adag oo ay kujirto silsiladda silsiladda waxaa loo tixraacayaa qaybo adag [7]. Kuwaasi waxay dhalinayaan wejiga qashinka ee loo yaqaan 'amorpheus' oo ay ku jiraan polyester / polytherther-ka waxaa loo yaqaan qaybo jilicsan. Ganacsi ahaan, polymers-kaan-kaan waxaa loo yaqaan malax

Codsi:

Polyurethane dabacsan ayaa inta badan ah qaab toosan oo leh heer-heer-heer-heer, oo leh xasillooni wanaagsan, iska caabbinta kiimikada, adkeysiga kiimikada, oo ah astaamaha farsamada ee PVC Foam, oo leh kala duwanaansho ku-meel-gaar ah. Waxay leedahay dahab kuleyl wanaagsan, dahaadha wanaagsan, iska caabbinta naxdinta iyo guryaha ka hortagga sun. Sidaa darteed, waxaa loo isticmaalaa sidii baakado, dahab dhawaq iyo waxyaabo shaandhaynaya. Caagga adag ee poranurethane waa iftiin, xijaab dhawaqa, xijaabta kuleylka ee ka sarreeya, iska caabbial kiimikada, guryaha korantada wanaagsan, ka baaraandegista biyaha, iyo nuugista biyaha oo yar. Waxaa inta badan loo isticmaalaa maadaama wax qaab dhismeedka loogu talagalay dhismaha, gawaarida, warshadaha duulista, dahaarka kuleylka iyo dahaarka kuleylka. Waxqabadka polyurethane ee u dhexeeya balaastigga iyo caagga, iska caabbinta saliida, xidho iska caabbinta, iska caabbinta heerkulka, caabbinta gaboobka, caabbinta da 'weyn, adag, adag, adkaade. Waxaa inta badan loo isticmaalaa kabaha kabaha iyo warshadaha caafimaadka. Polyurethane waxaa sidoo kale lagu samayn karaa caqabadaha, jaakadaha, maqaarka maqaarka, iwm.