PTFE ine zvinhu zvakanakisa senge makemikari inertness, kupisa kupisa (zvese zvakakwirira uye zvakaderera), magetsi ekudzivirira zvivakwa, yakaderera coefficient yekukwesha (static 0.08 uye dynamic 0.01), uye nonstick chivakwa pamusoro petembiricha yakakura (260 kusvika þ260 C).Iyo ine density muhuwandu hwe2.1e2.3 g/cm3 uye inonyungudutsa viscosity muhuwandu hwe1e10 GPa persecond.Molecular huremu hwePTFE haigone kuyerwa neyakajairwa nzira.Pane kudaro, nzira isina kunanga inoshandiswa kutonga uremu hwemamorekuru.Yakajairwa chaiyo giravhiti (SSG) ndiyo chaiyo giravhiti yechip yakagadzirirwa zvinoenderana neyakajairwa maitiro.Icho chiri pasi pemusimboti ndechekuti yakaderera molecular uremu PTFE inopenya zvakanyanya, nekudaro ichipa yakakwira SSG kukosha.
PTFE isati yambonyungudutswa ine crystallinity ye92e98%, ichiratidza mutsara uye nonbranched molecular structure.Kana yasvika 342 C, inonyunguduka ichichinja kubva kune chalky ruvara ruchena kuita läpinäkyvä amorphous gel.Yechipiri yakanyunguduka yePTFE i327 C nekuti haife yakadzokorodza kusvika pachiyero chakafanana neyakatangira kunyungudika kwayo.
Chekutanga-kurongeka uye yechipiri-yechipiri shanduko yakataurwa yePTFE.Shanduko dziri padyo nekamuri tembiricha ndeyekufarira kunoshanda nekuda kwekukanganisa pakugadziriswa kwezvinhu.Pazasi pe19 C iyo crystalline sisitimu yePTFE inenge yakakwana triclinic.Pamusoro pe19 C, iyo unit cell inoshanduka kuita hexagonal.Muchikamu che19e30 C, zvikamu zveketani zvinowedzera kusagadzikana uye iyo inosarudzwa crystallographic direction inonyangarika, zvichiita kuti kuwedzera kukuru kwehuwandu hwePTFE (1.8%) hunofanirwa kuongororwa pakuyera zviyero zveMarticles zvakagadzirwa kubva kumapurasitiki aya.
PTFE ndiyo inonyanya kurwisa polymer pakati pe thermoplastics.Zvisizvo zvinosanganisira simbi dzakanyungudutswa dzealkali, gaseous fluorine pakupisa kwakanyanya uye kumanikidzwa, uye mashoma eorganic halogenated makomisheni akadai sechlorine trifluoride (ClF3) uye oxygen difluoride (OF2).Mamwe makemikari mashoma anonzi anorwisa PTFE pane kana padyo nekushisa kwayo kwepamusoro sevhisi.PTFE inopindirana ne80% sodium kana potassium hydroxide uye mamwe mabhesi akasimba eLewis anosanganisira simbi hydrides.
Mechanical properties yePTFE inowanzove yakaderera kune mainjiniya mapurasitiki pakudziya kwekamuri.Kusanganisa nemafirita kwave kuri zano rekukunda kushomeka uku.PTFE ine zvinhu zvinobatsira zvemuchina mukushandisa kwayo tembiricha renji.
PTFE ine zvinhu zvemagetsi zvakanakisa senge high insulation resistance, low dielectric constant (2.1), uye low dissipation factor.Dielectric constant uye dissipation factor inoramba isina kushanduka muhuwandu hwe40 kusvika 250 C uye 5 Hz kusvika 10 GHz.Dielectric breakdown simba (nguva pfupi) ndeye 47 kV/mm yefirimu 0.25-mm-gobvu.Dielectric breakdown simba rinowedzerwa nekuderera kwevoids muPTFE, iyo inokonzerwa nekugadzirwa kwekugadzira.PTFE inorwiswa nemwaranzi, uye kuora kwemhepo kunotanga pachiyero che 0.02 Mrad.
Nguva yekutumira: Kubvumbi-14-2018