He mea pono loa ka PTFE no ka mea he hui kū hoʻokahi o nā waiwai.PTFE mea kemika inert, weatherable, maikai uila insulation, kiʻekiʻe wela kū'ē, he haʻahaʻa coefficient o friction a me ka ole-pili waiwai.
Hoʻohana maʻamau ʻia nā polymers i ka hana ʻana a me ka ʻenekinia, akā naʻe, ua paʻi ʻia ka noiʻi e wehewehe ana i kā lākou mau waiwai mechanical me he mea lā ʻaʻole i hōʻike ʻia ma muli o ko lākou koʻikoʻi.ʻO ka hapa nui o nā ʻikepili i hōʻike ʻia, hāʻawi pinepine ʻia ka ʻike e pili ana i ka moʻopuna pololei o ka polymer i hoʻāʻo ʻia a me kāna mōʻaukala hana.Ma muli paha o ka paʻakikī o ka hoʻokumu ʻana i ka hōʻike ʻana i nā mea kikoʻī e like me ka hana ʻana i nā hoʻokolohua mechanical maoli.Eia kekahi, ʻo ka hoʻohālikelike kamepiula pololei o ka pane mechanical polymer i kona wā ʻōpiopio.Hoʻohana maʻamau ʻia nā ʻano hana empirical, akā ʻaʻole pololei lākou ma waho o kahi ākea haiki.ʻO kekahi kumu o kēia, ma waho aʻe o ka paʻakikī o ka pane polymer, ʻo ka loaʻa ʻole o ka ʻikepili ma waho o kahi ʻāpana hoʻokolohua haiki e hoʻokūkū a hoʻonui i ka ikaika o nā kumu hoʻohālike empirical a phenomenological paha.Maʻaneʻi, ke hōʻike nei mākou i nā hopena mua o ka hoʻoikaika ʻana i nā hoʻopaʻapaʻa multi-disciplinary e pili ana i ka hoʻomaopopo ʻana i ka pane mechanical o kahi polymer i ʻike maikaʻi ʻia mai kahi ʻike hoʻokolohua a ma hope aku, i hui pū ʻia me ka hana ʻana o kahi kumu hoʻohālike koʻikoʻi hiki ke hoʻokō ʻia i nā code kamepiula. .
ʻO ka polymer i wehewehe ʻia ma kēia haʻawina he poly(tetrafluoroethylene) (PTFE).Ua koho ʻia ʻo ia no nā kumu he nui, me kona hoʻohana ʻana ma ke ʻano he mea ʻenehana maʻamau no nā ʻāpana liʻiliʻi kiʻekiʻe a me kona loaʻa ʻana mai nā mea hana.ʻOiai ua aʻo nui ʻia i ka wā i hala, ua liʻiliʻi ka nānā ʻana i nā palapala ākea no nā makahiki he 25 i hala.Ua koho mākou e nānā hou i kēia mea ma muli o ka paʻakikī o ke kūkulu ʻana a me ka nele o ka ʻikepili mechanical.He mea kupaianaha ka PTFE ma nā ʻano he nui.Hōʻike ia i nā waiwai pono ma luna o ka laulā wela loa o kekahi polymer;Mālama ʻo PTFE i kekahi ana o ka ductility ma 4 K a ma kekahi mau kūlana i hoʻohana ʻia i nā noi ma 540 8C . ʻAʻole hiki ke hoʻoheheʻe ʻia i nā mea hoʻoheheʻe maʻamau āpau a kūʻē i nā mea ʻakika a me nā mea caustic.Aia ka PTFE i waena o ka resistivity kiʻekiʻe loa o kekahi mea, kahi ikaika dielectric kiʻekiʻe a me ka poho dielectric haʻahaʻa.He haʻahaʻa loa ka coefficient o ka friction sliding ma waena o ka PTFE a me nā mea ʻenekinia he nui a i ka wā i hoʻopaʻa ʻia me nā pūhui hoʻohaʻahaʻa ʻaʻahu, ua hoʻokumu ʻia kahi papa hana nui o nā mea halihali.Hoʻohui ʻia me kona helu haʻahaʻa o ka friction a me ka paʻa kemika, ʻaneʻane hiki ʻole i ka PTFE ke hoʻopili i nā mea ʻē aʻe.Hoʻohana pinepine ʻia kēia waiwai i ka ʻenehana hana ʻenehana kahi mea nui ka maʻalahi o ka hoʻomaʻemaʻe.ʻO kahi hiʻohiʻona o ka PTFE i hoʻopaʻa iā ia mai ka hoʻohana ʻana i ka ʻenehana a me ka ʻenekinia ʻoi aku ka nui o ka hoʻoheheʻe ʻana (1011 P ma 380 8C).ʻAʻole hiki kēia i ka hoʻoheheʻe ʻana a me ka puhi ʻana mai ka hiki ʻana a ʻo ka sintering pipiʻi wale nō a me nā kaʻina hana extrusion i loaʻa no ka hana ʻāpana.
Ke kālele nei kēia pepa i ka hōʻike ʻana i nā mea waiwai kumu a me ka pane ʻana o nā mea PTFE pedigreed ma nā ʻano kānana a me nā mahana like ʻole.E pili ana nā pepa e hiki mai ana i ka pane tensile a me ka shear, nā hopena kikoʻī o ka polymer crystallinity, ballistic a me ka haʻalulu a me ka hoʻomohala ʻana i kahi kumu hoʻohālike kumu.
Ua paʻi ʻia ka noiʻi mua loa e pili ana i nā waiwai compressive o PTFE.Aia kekahi mau noiʻi e pili ana i nā waiwai kolo, akā ma ke ʻano o ka engineeringdeformation, ʻeono wale nō mau kuhikuhi i hele mai i ka manaʻo o nā mea kākau.I ka makahiki 1963, ua paʻi ʻo Davies i kahi pepa e pili ana i ka hoʻomohala ʻana i kahi ʻōnaehana bar Split-Hopkinson.Ma ke ʻano he ʻāpana o kēia hōʻike, ua hōʻike ʻia kahi ʻāpana wela o ka lumi hoʻokahi no PTFE ma z1700 sK1.ʻO ka nui o ke koʻikoʻi i kau ʻia ma kēia ʻōnaehana he 3% wale nō.Ua paʻi ʻia nā ʻikepili helu kiʻekiʻe e pili ana i ka polymer versus e Grey a me Wally.Ua paʻi ʻo Koo i ka ʻikepili koʻikoʻi/koʻikoʻi no kahi huahana Imperial Chemical Industries PTFE i kapa ʻia ʻo Halon G-80 ma 1965.Ua kūkākūkā pōkole ʻia nā hopena o ka wela ma ka pane mechanical.
Ka manawa hoʻouna: ʻAukake-16-2016