He waiwai maikaʻi loa ka PTFE e like me ka inertness kemika, ke kū ʻana o ka wela (ke kiʻekiʻe a me ka haʻahaʻa), nā waiwai insulation uila, ka coefficient haʻahaʻa o ka friction (static 0.08 a me ka dynamic 0.01), a me ka waiwai nonstick ma kahi ākea ākea (260 a þ260 C).Loaʻa iā ia ka mānoanoa ma ka laulā o 2.1e2.3 g/cm3 a melt viscosity i ka laulā o 1e10 GPa persecond.ʻAʻole hiki ke ana ʻia ke kaumaha molekula o PTFE e nā ʻano maʻamau.Akā, hoʻohana ʻia kahi ala kūʻokoʻa e hoʻoponopono i ke kaumaha molekala.'O ka'umekaumaha kiko'ī ma'amau (SSG) ka 'umekaumaha kiko'ī o kahi pahu i ho'omākaukau 'ia e like me ke ka'ina hana ma'amau.ʻO ke kumu kumu, ʻoi aku ka nui o ke kaumaha o ka molekala PTFE, no laila e hāʻawi ana i nā koina SSG kiʻekiʻe.
ʻO ka PTFE ʻaʻole i hoʻoheheʻe ʻia ma mua he crystallinity o 92e98%, e hōʻike ana i kahi ʻano molekala laina a me ka nonbranched.I ka hiki ʻana i 342 C, hoʻoheheʻe ʻo ia mai kahi kala keʻokeʻo keʻokeʻo i loko o kahi gel amorphous.ʻO ka helu hoʻoheheʻe ʻelua o PTFE ʻo 327 C no ka mea ʻaʻole ia e hoʻoheheʻe hou i ka nui like me ka mua o kona heheʻe mua ʻana.
Ua hōʻike ʻia nā hoʻololi o ke kauoha mua a me ka lua no PTFE.ʻO nā hoʻololi e pili kokoke ana i ka wela lumi he mea hoihoi kūpono ma muli o ka hopena i ka hana ʻana o ka mea.Ma lalo o 19 C ka ʻōnaehana crystalline o PTFE he triclinic kokoke loa.Ma luna o 19 C, hoʻololi ka pūnaehana ʻāpana i hexagonal.I loko o ka laulā o 19e30 C, ulu nā ʻāpana kaulahao me ka ʻinoʻino a nalowale ke kuhikuhi crystallographic i makemake ʻia, ka hopena i ka hoʻonui nui ʻana i ka nui kikoʻī o PTFE (1.8%) pono e noʻonoʻo ʻia i ke ana ʻana i nā ana o nā Marticles i hana ʻia mai kēia mau plastics.
ʻO PTFE ka polymer kūpaʻa loa i waena o nā thermoplastics.ʻO nā mea ʻokoʻa e pili ana i nā metala alkali hoʻoheheʻe ʻia, ka fluorine kinoea i nā wela kiʻekiʻe a me nā kaomi, a me ka liʻiliʻi o nā pūhui halogenated organik e like me ka chlorine trifluoride (ClF3) a me ka oxygen difluoride (OF2).Ua hōʻike ʻia kekahi mau kemika ʻē aʻe e hoʻouka i ka PTFE ma kahi a i ʻole kokoke i kona wela lawelawe kiʻekiʻe.Hoʻopili ʻo PTFE me 80% sodium a i ʻole potassium hydroxide a me kekahi mau kumu Lewis ikaika me nā hydride metala.
ʻOi aku ka haʻahaʻa o nā waiwai mīkini o PTFE ma mua o ka ʻenekinia plastics i ka lumi wela.ʻO ka hui pū ʻana me nā mea hoʻopihapiha ka hoʻolālā e hoʻopau i kēia hemahema.Loaʻa iā PTFE nā waiwai mechanical pono i kona hoʻohana ʻana i ka pae wela.
Loaʻa i ka PTFE nā waiwai uila maikaʻi e like me ke kūpaʻa insulation kiʻekiʻe, haʻahaʻa dielectric mau (2.1), a me ka mea haʻahaʻa dissipation.ʻAʻole hoʻololi ʻia ka mea paʻa mau a me ka dissipation ma waena o 40 a 250 C a me 5 Hz a 10 GHz.ʻO ka ikaika dielectric breakdown (manawa pōkole) he 47 kV/mm no kahi kiʻiʻoniʻoni 0.25-mm-mānoanoa.Hoʻonuiʻia ka ikaika dielectric breakdown me ka emiʻana o nā voids i loko o ka PTFE, ka mea i hoʻopiliʻia e ke kaʻina hana. Hoʻoukaʻia ka PTFE e ka radiation, a hoʻomaka ka hoʻohaʻahaʻaʻana i ka ea ma kahi o 0.02 Mrad.
Ka manawa hoʻouna: Apr-14-2018