Matembiricha ari pamusoro pe77°C haakodzeri zvikamu zveazhinji elastomers nemapurasitiki, nepo PTFE inoshingirira tembiricha yakakwira kusvika 260°C.Kunyange pasi pe77°C, kana maasidhi anokonzera simbi uye organic solvents akasanganiswa, liner uye zvikamu zvePTFE zvinowanzofarirwa nekuti elastomers nemamwe mapurasitiki anowanzo shaya kurwisa kuzvimba kwe solvent uye kupfava.
NeKemikari inertness, tinoreva izvozvoPTFEFluorocarbon resin inogona kuramba ichisangana nechimwe chinhu pasina chinooneka chemakemikari maitikiro ari kuitika.Kazhinji, PTFE fluorocarbon resins ndeyemakemikari inert.Zvakadaro, chirevo ichi, sezvese generalizations, chinofanirwa kuve chakakodzera kana chichizove chakarurama.Iko kufanirwa hakuzokonzeri kuvhiringidzika, zvisinei, kana munhu akachengeta mupfungwa izvo zvakakosha nezve maitiro ePTFE resins.
Iyo yakajairika tsananguro pfupiso yeakasiyana bvunzo data inogona kutsausa, nekuti inogona kusunganidzwa pamwechete akasiyana marudzi e "Chemical" maitiro.Kana tsananguro ichizojeka, inofanirwa kusiyanisa pakati pekuita kwemakemikari nezviito zvemuviri zvakaita sekunyura.Tsananguro yacho inofanirwa kugonesa mushandisi kuti atarise hukama hwemuviri nemakemikari zvimiro izvo zvinogona kukanganisa imwe application.
Semuenzaniso, PTFE resins haizogadziriswi nekunyudzwa mu aqua regia.Asi kana tembiricha uye mhedzisiro yekumanikidza kweiyi reagent yakakwira, kutorwa kwezvikamu zveiyo reagent muresin kuchawedzerawo.Kuchinja kunotevera, kwakadai sekukasira kurasikirwa nekumanikidzwa, kunogona kukuvadza mumuviri nekuda kwekuwedzera kwemhute yakanyudzwa muresin.Zviripachena, saka, kana tichitaura nezvemakemikari ePTFE tinofanira kusiyanisa pakati pemaitiro emakemikari chaiwo, sezvatakataura maererano ne "Chemical compatibility" uye zviito zvemuviri, zvakadai se "absorption" yakasanganiswa ne mechanical uye thermal stress.
Mukati metembiricha yekushandiswa kwakajairika, PTFE resin inorwiswa nemakemikari mashoma pane kutara makemikari ayo anowirirana nawo.Aya mareactants ari pakati peakanyanya chisimba oxidizer uye ekudzikisa agent anozivikanwa.Elemental sodium muhukama hwepedyo nefluorocarbons inobvisa fluorine kubva mupolymer molecule.Kuita uku kunoshandiswa zvakanyanya mumhinduro dzeanhydrous yekumisikidza nzvimbo dzePTFE kuitira kuti resin igone kunamatira.Imwe alkali simbi (potassium, lithium, etc.) inoita zvakafanana.
Musanganiswa wepachokwadi wesimbi dzakapatsanurwa zvakatsetseka (semuenzaniso, aruminiyamu kana magnesium) neupfu fluorocarbon resin inogona kuita zvechisimba kana yabatidzwa, asi tembiricha yekubatidza iri kure nepamusoro peyakabudiswa inokurudzirwa tembiricha yepamusoro yePTFE resins.Izvo zvine simba zvakanyanya oxidizers, fluorine (F2) uye ane hukama nemakemikari (semuenzaniso, chlorine trifluoride, CIF3), inogona kubatwa nePTFE chete nekuchenjerera kukuru uye kucherechedzwa kwenjodzi dzinogona kuitika.Fluorine inonyudzwa mumaresini, uye nekubatana kwepedyo kwakadaro musanganiswa unova nehanya kune sosi yekupisa senge kukanganisa.
Mune zvimwe zviitiko panguva kana pedyo neyakakurudzirwa sevhisi yekumisa tembiricha ye260°C yeTFE & PFA, uye 204°C yeFEP, makemikari mashoma ari pamazinga akanyanya anonzi anoshanda akananga kuPTFE.Kurwiswa kwakafanana nesodium etch kwakagadzirwa pakupisa kwakanyanya kwakadaro ne80% NaOH kana KOH, metal hydrides yakadai seboranes (eg, B2H6), aluminium chloride, ammonia (NH3), uye mamwe amines (R-NH2) uye imines ( R = NH).Zvakare, kunonoka oxidative kurwisa kwakaonekwa ne70% nitric acid pasi pekumanikidzwa pa250 ° C.Kuyedzwa kwakakosha kunodiwa kana kunyanyisa kwakadaro kwekudzikisa kana oxidizing mamiriro akasvikirwa.
Nekudaro, kunze kwekunge zvakataurwa, PTFE resins inoratidza huwandu hwakakura kwazvo hwekemikari uye yekupisa sevhisi.Asi mutengi kana chirevo chezvikamu zvePTFE anodawo kuziva nekunzwisisa painogumira maererano neyakajairwa makemikari nharaunda.Kusiyana nekudzivirirwa kwesimbi, idzi kazhinji hadzisi kemikari kutenga zvenyama mune zvakasikwa.Migumisiro yekushisa, kumanikidzika, uye kunyura kwemakemikari muPTFE, uye kushamwaridzana kwavo, ndizvo izvo nekufamba kwenguva zvinowanzogadzirisa mamiriro ayo PTFE ichaita zvinogutsa.Sezvo izvi zvakasiyana nechinenge chimwe chinhu chipi nechipi chekuvakwa, zvinoda kunyatsotariswa kwetsanangudzo dzakadzama dzinotevera.
Nguva yekutumira: Oct-04-2019