PTFE vs LDPE

Polyethylene dị obere (LDPE) bụ thermoplastic emere site na monomer ethylene.Ọ bụ ọkwa mbụ nke polyethylene, nke Imperial Chemical Industries (ICI) mepụtara na 1933 na-eji usoro nrụgide dị elu site na polymerization free radical.EPA na-ekwu na 5.7% nke LDPE ka emegharịrị.N'agbanyeghị asọmpi sitere na polymers ọgbara ọhụrụ, LDPE na-aga n'ihu na-abụ ọkwa plastik dị mkpa.

Akọwapụtara LDPE site na oke njupụta nke 0.910–0.940 g/cm3.Ọ naghị emeghachi omume na okpomọkụ nke ụlọ, ma e wezụga site na ihe ndị na-emepụta ihe na-eme ka ọ dị ike, na ụfọdụ ihe mgbaze na-ebute ọzịza.Ọ nwere ike idi okpomọkụ nke 80 Celsius C na-aga n'ihu na 95 Celsius C maka obere oge.Emere ya na ntụgharị translucent ma ọ bụ opaque, ọ na-agbanwe agbanwe ma sie ike.

LDPE nwere alaka karịa HDPE, ya mere ike intermolecular ya adịghị ike, ike ike ya dị ala, na nkwụghachi ya dị elu.Ọzọkwa, n'ihi na ụmụ irighiri ihe ndị dị n'ime ya na-adịchaghị nke ọma na obere kristal n'ihi alaka akụkụ ya, njupụta ya dị ala.

PTFE bụ polymer thermoplastic, nke bụ ihe siri ike na-acha ọcha na ụlọ okpomọkụ, nke nwere ihe dị ka 2200 kg / m3.Dị ka DuPont si kwuo, ebe mgbaze ya bụ 600 K (327 °C; 620 °F).[19]Ọ na-edobe ike dị elu, ike na mmanye onwe ya na obere okpomọkụ ruo 5 K (-268.15 ° C; -450.67 ° F), na mgbanwe dị mma na okpomọkụ karịa 194 K (-79 °C; -110 °F).PTFE na-enweta ihe onwunwe ya site na nchịkọta mkpokọta nke njikọ carbon-fluorine, dị ka fluorocarbons niile.Naanị kemịkalụ a maara na-emetụta njikọ carbon-fluorine ndị a bụ ọla ndị na-arụ ọrụ nke ukwuu dị ka ọla alkali, yana na okpomọkụ dị elu nwekwara ọla dị ka aluminom na magnesium, yana ndị na-eme fluorinating dị ka xenon difluoride na cobalt (III) fluoride.

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Ngwa ihe:

PTFE:Ngwọta cabling; Igwe anaghị agba mmanụ; O-mgbanaka; Akàrà; Capacitors; Semiconductor nrụpụta; Akụkụ ọkụ eletrik dị elu; Gasket, ihe Valve.

LDPE:Trays na arịa ebumnuche izugbe;Ebe ọrụ na-eguzogide corrosion; Akụkụ nke ngwa kọmputa, dị ka draịva diski ike, kaadị ihuenyo, na draịva diski anya.

Njirimara ihe

PTFE:Ngwongwo dielectric magburu onwe ya; Inertness na ọtụtụ kemịkalụ; Igwe ọkụ dị elu na nguzogide kemịkalụ;Enwere ike ịrụ ọrụ nke ọma nke esemokwu; Nguzogide radieshon magburu onwe ya; mmịpụta mmiri efu; enweghị mmetụta na-adịghị ahụkebe ugboro ugboro; Nrụ ọrụ.

LDPE:Na-adịghị emeghachi omume na ụlọ okpomọkụ; Nwere ike iguzogide okpomọkụ nke 80 Celsius C na-aga n'ihu; Ịrụ ọrụ.