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Lebitso la sehlahisoa:Polyurethane

Sebopeho sa limolek'hule:

Thepa ea lik'hemik'hale:

Polyurethanes e ile ea hlahisoa 'me ea etsoa lipatlisiso ka Dr. Otto Bayer ka 1937. Polyurethane ke polymer eo switjha e nang le urethane eo u e fumanang. Uresthanes ke li-derivavatights tsa li-carbamic li-acid tse teng ka mokhoa oa tsona [10]. Monyetla o moholo oa Pu ke hore ketane ha e entsoe ka liathomo tsa khabone empa ho e-na le ho Héteroen, Carbone le naetrogen [4]. Bakeng sa lits'ebetso tsa indasteri, mochini oa polyhydroxyl o ka sebelisoa. Ka mokhoa o ts'oanang, metsoako ea naetrojene e sebetsang ea poly-e sebetsang e ka sebelisoa ho likhokahano tsa lapeng. Ka ho fetoha ebile e le ntho ea polyhydroxyl le likonte tsa li-nitrogen tsa li-Nitrogen tsa Naitrojene, thapo e fapaneng e ka hlahisoa [15]. Polyester kapa Polyother Resin e na le lihlopha tsa hydroyl li sebelisetsoa ho hlahisa polyesteror-Pu, ka ho latellana [Setšoantšo se leqepheng la 6]. Ho fapana ha palo ea likarolo tse ngata le libaka tse mahareng tsa ketane tsa lekala li hlahisa PHOTING ho tloha linear le ho feta ho ba thata. Linear pus e sebelisoa bakeng sa tlhahiso ea likhoele le ho bopa ka likhoele. Ho sebelisoa sefuba Lifoto tse feto-fetohang le tse thata, tse etsang hore maikutlo a hlahisoa, a ka fumanoa ka mekhoa e fapaneng ea indastering [7]. Ho sebelisa li-ppolymer tse tlase tsa molek'hule, li-copoletles tse fapaneng li ka hlahisoa. Sehlopha sa Hydmiyl sa hydrousl se lumella lihlopha tse fapaneng, tse bitsoang lilithara, li lokela ho kenngoa ka har'a Pun. Phapang ena ka likarolo tsena e fella ka likhahla tse fapaneng tsa matla le li-elasticity. Lithibelo li fana ka likriti tsa kristale tse fanang ka li-kristaline le ho ba le licha tse ngata tse fetisitsoeng ho isa likarolo tse 7]. Ba etsang hore banberphous e etselitsoeng bokhabane ba moea le ho ba le polyester / polyother e bitsoa likarolo tse bonolo. Khoebo ea Khoebo, e tsejoang e tsejoa e le pus e sentsoeng

Kopo:

Polyurethanes ke e 'ngoe ea lisebelisoa tse fetohileng ka ho fetisisa lefatšeng kajeno. Li ngata tsa bona li sebelisoa haholo ke mafura a thata libakeng tsa ka tlung tse senyehileng, marulelong, lihlahla le li-alatives tse 17,18]. Polyurethanes le lilemong tse mashome a mararo tse fetileng ka lilemo tse fapaneng ka lebaka la lits'ebetso tse fapaneng ka lebaka la lits'ebetso tsa bona, melemo ea matla le khakanyo e ka bang teng ea tikoloho le ho hlaka ha tikoloho. Tse ling tsa lintho tse etsang hore malyulyughs ke life? Ho lakatsa batho ka polyurehane haholo ho isa ho nako e telele ea lihlahisoa tse ngata tsa lihlahisoa tse ngata. Lifetetso tsa Boemo ba Lichelete le Tlhaselo ea Lihlahisoa ke litekolosi tsa bohlokoa tsa tikoloho hangata hangata ho khethoa ha polyurethanes [19-21]. Polyurethanes (pus) e emela sehlopha sa bohlokoa sa bo-ilengttor ba bona ba thelmoplatic le Thermos le lik'hemik'hale, le li-coly-isocantanates.