PTFE vs LDPE

Polyethylene e tlase-tlase (LDPE) ke thermoplastic e entsoeng ka monomer ethylene.E ne e le sehlopha sa pele sa polyethylene, e hlahisitsoeng ka 1933 ke Imperial Chemical Industries (ICI) e sebelisa ts'ebetso ea khatello e phahameng ka polymerization ea mahala.EPA e hakanya hore 5.7% ea LDPE e sebelisoa hape.Leha ho na le tlholisano e tsoang ho li-polymers tsa sejoale-joale, LDPE e ntse e tsoela pele ho ba sehlopha sa bohlokoa sa polasetiki.

LDPE e hlalosoa ka mefuta e mengata ea boima ba 0.910-0.940 g/cm3.Ha e sebetse ka mocheso oa kamore, ntle le ka li-oxidizing agents tse matla, 'me li-solvents tse ling li baka ho ruruha.E khona ho mamella mocheso oa 80 °C ka ho tsoelang pele le 95 °C ka nako e khutšoanyane.E entsoe ka mefuta e feto-fetohang kapa ea opaque, e fetoha habonolo ebile e thata.

LDPE e na le makala a mangata ho feta HDPE, kahoo matla a eona a li-intermolecular a fokola, matla a eona a tsitsitseng a tlaase, 'me ho tiea ha eona ho phahame.Hape, hobane limolek'hule tsa eona ha li thata haholo ebile ha li na kristale ka lebaka la makala a mahlakoreng, boima ba eona bo tlase.

PTFE ke polymer ea thermoplastic, e tiileng e tšoeu ka mocheso oa kamore, 'me boima ba eona bo ka ba 2200 kg/m3.Ho ea ka DuPont, ntlha ea ho qhibiliha ha eona ke 600 K (327 °C; 620 °F).[19]E boloka matla a phahameng, ho thatafala le ho itlotsa ha mocheso o tlase ho 5 K (−268.15 °C; -450.67 °F), le ho tenyetseha hantle ha mocheso o ka holimo ho 194 K (−79 °C; -110 °F).PTFE e fumana thepa ea eona ho tsoa litlamong tse kopaneng tsa carbon-fluorine bond, joalo ka li-fluorocarbons tsohle.Lik'hemik'hale feela tse tsejoang ka ho ama litlamo tsena tsa carbon-fluorine ke litšepe tse sebetsang haholo joalo ka tšepe ea alkali, 'me lithempereichara tse phahameng hape tse kang aluminium le magnesium, le lisebelisoa tsa fluorinating joalo ka xenon difluoride le cobalt(III) fluoride.

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Lisebelisoa:

PTFE:Litharollo tsa li-cabling; Li-bearings tse sa kenngoeng; O-rings; Litiiso; Li-Capacitor; Ho etsa li-semiconductor; Likarolo tse phahameng tsa mocheso oa motlakase; Li-Gaskets; Likarolo tsa Valve.

LDPE:Literene le lijana tsa morero o akaretsang;Bokaholimo ba mosebetsi bo sa jeng;Likarolo tsa lisebelisoa tsa komporo, joalo ka li-hard disk drive, likarete tsa skrini, le li-optical disc drive.

Thepa Thepa

PTFE:Thepa e ntle haholo ea dielectric; ho hloka botsitso ho lik'hemik'hale tse ngata; mocheso o phahameng le khanyetso ea lik'hemik'hale; khohlano e tlase haholo; khanyetso e ntle ea mahlaseli; ho monya mongobo oa Zero; ha ho na kutlo ho maqhubu a matla; machinability.

LDPE:Ha e sebetsane le mocheso oa kamore; E khona ho mamella mocheso oa 80 °C ka ho tsoelang pele;