Ngaba iplastiki yi-conductor okanye i-insulator?Okokuqala, masiqonde umahluko phakathi kwezi zimbini: I-conductor yinto enokuxhathisa okuncinci kwaye iqhuba umbane ngokulula.I-insulator yinto engaqhubi umbane phantsi kweemeko eziqhelekileyo.Iimpawu ze-insulators kukuba iintlawulo ezintle kunye nezibi kwiimolekyuli ziboshwe ngokuqinileyo, kwaye kukho iincinci ezincinci ezihlawulisiweyo ezinokuhamba ngokukhululekile, kwaye ukuxhathisa kwabo kukhulu.Xa i-insulator ihlanjululwa ngokukhanya ngamandla amakhulu kune-gap yebhendi, i-electrons kwi-valence band iyavuya kwibhendi yokuqhuba, ishiya imingxuma kwi-valence band, zombini ezinokuthi ziqhube umbane, into eyaziwa ngokuba yi-photoconductivity.Uninzi lwee-insulators zineepropati ze-polarization, ngoko ke i-insulators ngamanye amaxesha ibizwa ngokuba yi-dielectrics.Ii-insulators zikhusela phantsi kombane oqhelekileyo.Xa i-voltage inyuka ukuya kumda othile, ukuphuka kwe-dielectric kuya kwenzeka kwaye i-insulating state iya kutshatyalaliswa.
Iiplastiki zinokwahlulwa zibe ngamacandelo amabini: i-thermosetting kunye ne-thermoplastic.Eyangaphambili ayinakubunjwa ngokutsha ukuze isetyenziswe, kwaye le yokugqibela inokuveliswa kwakhona.I-Thermoplasticity inobude obukhulu bomzimba, ngokubanzi i-50% ukuya kuma-500%.Amandla awahlukani ngokupheleleyo ngokulandelelana kobude obahlukeneyo.
Inxalenye ephambili yeplastiki yi-resin.I-resin ibhekisa kwikhompawundi ye-polymer engazange ixutywe kunye nezongezo ezahlukeneyo.Igama elithi resin ekuqaleni lalibizwa ngokuba yi-lipids efihliweyo zizilwanyana kunye nezityalo, ezifana ne-rosin kunye ne-shellac.
Iiplastiki zizithinteli, kodwa zininzi iintlobo zeeplastiki.Iimpawu zombane zeeplastiki ezahlukeneyo zihlukile, kwaye amandla e-dielectric nawo ahluke.
Ixesha lokuposa: Jul-30-2022