I-PTFE sisixhobo esiluncedo kakhulu kuba indibaniselwano eyodwa yeepropathi.I-PTFE i-inert ye-chemically inert, i-weatherable, i-insulation egqwesileyo yombane, ukumelana nobushushu obuphezulu, i-coefficient ephantsi ye-friction kunye ne-non-adhesive properties.
Iipolymers ziqhele ukusetyenziswa ekwenziweni kunye nobunjineli, nangona kunjalo, uphando olupapashiweyo oluchaza iipropathi zabo zoomatshini zibonakala zingamelwanga ngokunika ukubaluleka kwazo.Uninzi lwedatha ebonisiweyo, yonke inika ulwazi olungonelanga malunga nomnombo ochanekileyo wepolymer evavanyiweyo kunye nembali yayo yokucubungula.Oku kunokwenzeka kungenxa yokuba ukuseka umgca wesiseko sophawu lwemathiriyeli kuhlala kunzima njengokwenza olona vavanyo lomatshini.Ukongeza, imodeli echanekileyo yekhompyuter yokuphendula koomatshini bepolymer isekwisiqalo sayo.Iindlela ezininzi zobungqina zidla ngokusetyenziswa, kodwa zikholisa ukungachaneki ngaphandle koluhlu olumxinwa lwepharamitha.Esinye isizathu soku, ngaphandle kokuntsokotha kwempendulo yepolymer, kukuba rhoqo idatha ayifumaneki ngaphandle koluhlu olumxinwa lovavanyo lweparamitha ukucela umngeni kunye nokwandisa ukomelela kweempirical okanye iphenomenological based constitutive models.Apha, sinikezela ngeziphumo zokuqala zomzamo ohlangeneyo woqeqesho olujolise ekuqondeni impendulo yomatshini wepolymer ephawulwe kakuhle ukusuka kwindawo yokujonga yovavanyo kwaye kamva, kunye nokuveliswa kwemodeli yethiyori eyomeleleyo ekwaziyo ukusetyenziswa kwiikhowudi zekhompyuter. .
Ipolymer echazwe kolu phando yi-poly(tetrafluoroethylene) (PTFE).Ikhethwe ngenxa yezizathu ezininzi, kubandakanywa nokusetyenziswa kwayo njengento eqhelekileyo yobunjineli kwiindawo ezincinci zokusebenza okuphezulu kunye nokufumaneka kwayo kubavelisi abaninzi.Ngoxa ifundwe kakhulu kwixesha elidlulileyo, iye yafumana ingqalelo encinane kuncwadi oluvulekileyo kwiminyaka engama-25 edluleyo.Sikhethe ukuphinda sijonge le sixhobo ngenxa yobunzima besakhiwo kunye nokungabikho kwedatha yomatshini.I-PTFE yinto ephawulekayo ngeendlela ezininzi .Ibonisa iipropati eziluncedo phezu koluhlu olubanzi lobushushu bayo nayiphi na i-polymer;I-PTFE igcina umlinganiselo othile we-ductility ku-4 K kwaye kwezinye iimeko isetyenziswa kwizicelo kwi-540 8C .Ayinyibiliki kuzo zonke izinyibilikisi eziqhelekileyo kwaye iyaxhathisa phantse zonke izinto ezine-acidic kunye ne-caustic.I-PTFE iphakathi kwezona zixhobo ziphezulu zokumelana nayo nayiphi na imathiriyeli, amandla edielectric aphezulu kakhulu kunye nelahleko yedielectric ephantsi.I-coefficient of sliding friction phakathi kwe-PTFE kunye nemathiriyeli yobunjineli eninzi iphantsi kakhulu kwaye xa i-sintered nge-naar recing compounds, udidi olubalulekileyo kushishino lwemathiriyeli yokuthwala luyenziwa.Xa kudityaniswe ne-coefficient ephantsi yokukhuhlana kunye nokuzinza kweekhemikhali, i-PTFE iphantse ingenzeki ukuba ezinye izixhobo zibambelele kuyo.Le propati isoloko isetyenziselwa iteknoloji yokucubungula i-industrial apho kulula ukucoca kubalulekile.Omnye umba we-PTFE oye wayibamba kusetyenziso olubanzi lweshishini kunye nobunjineli yi-viscosity yayo ephezulu yokunyibilika (1011 P kwi-380 8C).Oku kuthintela naliti kunye nokuvuthela ukubumba ukuba kungenzeki kwaye kuphela i-sintering ebiza kakhulu kunye neenkqubo zokwenziwa kwe-extrusion ezifumanekayo kwinxalenye yemveliso.
Eli phepha ligxininise kwi-base-line material characterization kunye ne-compressive response ye-pedigreed PTFE imathiriyeli kwii-strain-rates kunye namaqondo okushisa ahlukeneyo.Amaphepha exesha elizayo aya kujongana ne-tensile kunye ne-chear impendulo, iziphumo ezineenkcukacha ze-polymer crystallinity, i-ballistic kunye nokuziphatha okothusayo kunye nophuhliso lwemodeli yethiyori esebenzayo.
Uphando oluncinci kakhulu lwangaphambili malunga neepropathi ezicinezelayo ze-PTFE zipapashiwe.Olunye uphando malunga neepropathi ze-creep zikhona, kodwa ngokwemigaqo yobunjineli bobunjineli, ziimbekiselo ezintandathu kuphela eziye zafika kwingqalelo yababhali.Ngowe-1963, uDavies wapapasha iphepha ngophuhliso lweSplit-Hopkinson bar system.Njengenxalenye yale ngxelo, uxinzelelo lwegumbi elilodwa lobushushu / ijika le-PTFE linikezelwe kwi-z1700 sK1.Olona xinzelelo luphezulu lubekwe kule nkqubo yaba sisi-3% kuphela.Idatha eyongezelelweyo yezinga eliphezulu kwi-polymer ngokuchasene nobushushu yapapashwa nguGrey noWalley.U-Koo upapashe uxinzelelo / idatha yoxinzelelo lwe-Imperial Chemical Industries PTFE imveliso ebizwa ngokuba yi-Halon G-80 kwi-1965.Iimpembelelo zeqondo lokushisa kwimpendulo yomatshini nazo zaxoxwa ngokufutshane.
Ixesha lokuposa: Aug-16-2016