I-PTFE vs LDPE

I-Low-density polyethylene (LDPE) iyi-thermoplastic eyenziwe nge-monomer ethylene.Kwakuyibanga lokuqala le-polyethylene, eyakhiqizwa ngo-1933 yi-Imperial Chemical Industries (ICI) isebenzisa inqubo yokucindezela okuphezulu nge-polymerization yamahhala.I-EPA ilinganisela u-5.7% we-LDPE ugaywa kabusha.Naphezu kokuncintisana okuvela kuma-polymers esimanje, i-LDPE isaqhubeka nokuba yibanga elibalulekile lepulasitiki.

I-LDPE ichazwa ngebanga lokuminyana elingu-0.910–0.940 g/cm3.Ayisebenzi emazingeni okushisa asekamelweni, ngaphandle kwama-oxidizing agents aqinile, futhi amanye ama-solvents abangela ukuvuvukala.Ingakwazi ukumelana namazinga okushisa angu-80 °C ngokuqhubekayo kanye no-95 °C isikhathi esifushane.Yenziwe ngokuhlukahluka okukhanyayo noma okufiphele, iyavumelana nezimo futhi iqinile.

I-LDPE inamagatsha amaningi kune-HDPE, ngakho amandla ayo e-intermolecular aba buthaka, amandla ayo aqinile aphansi, futhi ukuqina kwayo kuphakeme.Futhi, ngenxa yokuthi ama-molecule ayo ahlanganiswe kancane futhi i-crystalline encane ngenxa yamagatsha aseceleni, ukuminyana kwawo kuphansi.

I-PTFE i-polymer ye-thermoplastic, eqinile emhlophe ekamelweni lokushisa, enokuminyana okungaba ngu-2200 kg/m3.Ngokusho kweDuPont, indawo yayo yokuncibilika ingu-600 K (327 °C; 620 °F).[19]Igcina amandla aphezulu, ukuqina kanye nokuzithambisa emazingeni okushisa aphansi kuze kufike ku-5 K (−268.15 °C; -450.67 °F), futhi ikwazi ukuguquguquka kahle emazingeni okushisa angaphezu kuka-194 K (−79 °C; -110 °F).I-PTFE izuza izakhiwo zayo kusukela kumphumela ohlanganisiwe webhondi ye-carbon-fluorine, njengoba kwenza wonke ama-fluorocarbons.Amakhemikhali okuwukuphela kwawo aziwa ukuthi athinta la mabhondi e-carbon-fluorine ayizinsimbi ezisebenza kakhulu njengezinsimbi ze-alkali, futhi emazingeni okushisa aphezulu nezinsimbi ezinjenge-aluminium ne-magnesium, nama-fluorinating agents afana ne-xenon difluoride ne-cobalt(III) fluoride.

.

Izinsiza Ezibalulekile:

I-PTFE:Izixazululo zekhebula;Ama-bearings angagcotshiwe;O-rings;Seals;Capacitor;Ukukhiqiza ama-semiconductor;Izingxenye zikagesi ezishisa kakhulu;Amagesi;Izingxenye zamavalvu.

I-LDPE:Amathreyi neziqukathi zenjongo evamile;Izindawo zokusebenza ezimelana nokubola;Izingxenye zezingxenyekazi zekhompuyutha, ezifana namadrayivu e-hard disk, amakhadi esikrini, namadrayivu e-optical disc.

Izinto ezibonakalayo

I-PTFE:Izakhiwo ezinhle kakhulu ze-dielectric;Ukungangeni kumakhemikhali amaningi; Ukushisa okuphezulu nokumelana namakhemikhali; I-coefffiecient ephansi kakhulu yokungqubuzana; Ukumelana kahle nemisebe; Ukumunca umswakama ongu-Zero; Ayizwani nemvamisa yamandla uma iqhathaniswa; Ukusebenza kahle.

I-LDPE:Ayisebenzi emazingeni okushisa egumbi;Ingakwazi ukumelana namazinga okushisa angu-80 °C ngokuqhubekayo;Ikwazi ukusebenza.