PTFE vs LDPE

Polyethylene low-density (LDPE) wani thermoplastic ne da aka yi daga monomer ethylene.Ya kasance matakin farko na polyethylene, wanda aka samar a cikin 1933 ta Imperial Chemical Industries (ICI) ta amfani da babban matsi ta hanyar polymerization na radical.EPA ta kiyasta 5.7% na LDPE ana sake yin fa'ida.Duk da gasa daga ƙarin polymers na zamani, LDPE ya ci gaba da zama muhimmin darajar filastik.

An bayyana LDPE da kewayon yawa na 0.910-0.940 g/cm3.Ba ya amsawa a yanayin zafi, sai ta hanyar magunguna masu ƙarfi, kuma wasu kaushi suna haifar da kumburi.Yana iya jure yanayin zafi na 80 ° C ci gaba da 95 ° C na ɗan gajeren lokaci.An yi shi a cikin bambance-bambancen da ba a iya gani ba ko mara kyau, yana da sauƙin sassauƙa da tauri.

LDPE yana da rassa fiye da HDPE, don haka ƙarfinsa na intermolecular sun fi rauni, ƙarfin ƙarfinsa ya ragu, kuma ƙarfinsa ya fi girma.Har ila yau, saboda kwayoyin halittarsa ​​ba su da yawa kuma ba su da ƙasa da crystalline saboda rassan gefen, yawansa ya ragu.

PTFE shine polymer thermoplastic, wanda yake shi ne fari mai ƙarfi a cikin zafin jiki, tare da nauyin kusan 2200 kg/m3.A cewar DuPont, wurin narkewar sa shine 600 K (327 ° C; 620 ° F).[19]Yana kiyaye babban ƙarfi, tauri da lubrication kai a ƙananan yanayin zafi zuwa 5 K (-268.15 ° C; -450.67 °F), da kuma sassauci mai kyau a yanayin zafi sama da 194 K (-79 °C; -110 °F).PTFE yana samun kaddarorin sa daga jimillar tasirin carbon-fluorine bond, kamar yadda duk fluorocarbons ke yi.Abubuwan sinadarai guda ɗaya da aka sani suna shafar waɗannan haɗin gwiwar carbon-fluorine sune karafa masu amsawa sosai kamar ƙarfe na alkali, kuma a yanayin zafi mai girma haka kuma irin su aluminum da magnesium, da abubuwan da ke haifar da fluorine kamar xenon difluoride da cobalt (III) fluoride.

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Aikace-aikace na kayan aiki:

PTFE:Maganganun cabling; Ƙunƙarar da ba mai mai ba; O-rings; Seals; Capacitors; Semiconductor masana'antu; Sassan wutar lantarki mai girma; Gasket, Abubuwan Valve.

LDPE:Trays da kwantena na gaba ɗaya;Filayen aiki masu jure lalata;Sassan kayan aikin kwamfuta, kamar su rumbun adana bayanai, katunan allo, da fayafai na gani.

Kayayyakin Kayayyaki

PTFE:Kyawawan kaddarorin dielectric; Rashin ƙarfi ga mafi yawan sinadarai; Babban zafi da juriya na sinadarai; ƙwaƙƙwaran ƙarancin ƙarfi na gogayya; Kyakkyawan juriya na radiation; ƙarancin ɗanɗano na sifili; Ingantacciyar rashin jin daɗi ga mitar wutar lantarki;Machinability.

LDPE:Rashin amsawa a yanayin zafi na ɗaki; Zai iya jure yanayin zafi na 80 ° C ci gaba; iya aiki.