Iyo yakasarudzika yakashata yefluoroelastomer (FKM) kushomeka kwakadzika tembiricha kuramba. Iyo yakaderera-tembiricha yekudzosa tembiricha (TR10) yebhinari FKM kazhinji -18 kusvika -16 ℃, uye tembiricha yegirazi (Tg) i -20 ℃; kudzika-tembiricha kuramba kweternary FKM kwakaderera pane kuya kwebhanari FKM. Special yakaderera-tembiricha mhando FKM ine yakanaka yakaderera-tembiricha kuramba, asi mutengo wakakwira zvakanyanya.
FKM muASTM D 2000-2012 'yemotokari yerabha zvigadzirwa standard classification system' yeM2, M5, M6 giredhi zvigadzirwa zvinodiwa kupasa yakaderera-tembiricha embrittlement F15 (-25 ℃) bvunzo, M4 giredhi zvigadzirwa zvinodiwa kupasa yakaderera-tembiricha embrittlement F17 (-4) bvunzo. Mumakore achangopfuura, kuwedzera uye kuwedzera FKM zvigadzirwa zvinodiwa kusangana nezvinodiwa zvese zviri zviviri kupisa tembiricha kuramba (250-275 ℃) uye yakaderera tembiricha embrittlement F15 kana F17. Nzira yakanakisa ndeyekushandisa yakaderera-tembiricha FKM, senge brittleness tembiricha ye -45 ~ -40 ℃ Viton GLT mhando FKM, asi iyi FKM yepamusoro-tembiricha kuita haina kunaka uye mutengo wakaoma kuita kuti musika ugamuchirwe. Nekuvandudza mashandiro emabhinari eFKM makomputa anogona panguva imwe chete kusangana nezvinodiwa zvekudzikira uye nepamusoro tembiricha kuramba, uye mutengo unonzwisisika, wave nzvimbo inopisa yekutsvagisa.
Iri bepa rinoongorora maitiro eFKM yakaderera-tembiricha yeTg, TR10 uye brittleness tembiricha (Tbri) yehukama pakati pevadzidzi vepashure, fillers, mixing process, etc. pane bhinari uye ternary FKM adhesive yakaderera-tembiricha brittleness performance yekugadzirira yakaderera-tembiricha-inodzivirira FKM yekunamatira inonamatira!
1. Hunhu hweFKM yakaderera-tembiricha embrittlement zvivakwa
Rubber ine reversible deformation, inogona kuburitsa deformation yakakura pasi pekuita kwesimba diki rekunze, uye inogona kudzoserwa kune yayo yekutanga mushure mekubvisa simba rekunze, saka rinoshandiswa zvakanyanya. Zvisinei, sezvo tembiricha inoderera, elasticity yerabha inoderera zvishoma nezvishoma, uye kana ichisvika kuTg, rubber inorasikirwa nekusimba kwayo uye inokundikana. Nekuda kwemhando dzakasiyana dzezvigadzirwa zverabha, mukushandiswa kwekushandiswa kunogona kuve nekukanganiswa, kushushikana, kugera, torsion, extrusion, abrasion, nezvimwe, iyo yakaderera-yekushisa ebrittlement kuita kwayo kunofanirwa kuve kwakavakirwa pamamiriro ekushanda kwayo kusarudza nzira yakakodzera yekuyedza. Inowanzo shandiswa yakaderera-tembiricha embrittlement kuita bvunzo nzira dzinosanganisira Tg bvunzo, kukanganisa brittleness tembiricha bvunzo, yakaderera-tembiricha yekudzosa bvunzo, yakaderera-tembiricha torsional rigidity bvunzo (Gimen bvunzo), kuramba kutambanudza uye kutonhora coefficient bvunzo, yakaderera-tembiricha kuoma bvunzo, yakaderera-tembiricha yekumanikidza kusingaperi uye kusagadzikana kuzorora bvunzo, nezvimwe.
Iyo yakaderera tembiricha yekudzivirira yeFKM inogona kuratidzwa neTg, Tbri, TR10 uye Torsion Temperature pakadzika tembiricha (TGem), etc. Aya maparameter ane zvirevo zvakasiyana asi ane humwe hukama kune mumwe nemumwe.
(1) Tg ndiyo tembiricha iyo rabha inochinja kubva kune yakanyungudika kuenda kune yegirazi mamiriro uye girazi kuenda kune yakanyungudika mamiriro, ayo anowanzo ratidza kufamba kwe microscopic yerabha molecular cheni.
(2) Tbri ndiyo tembiricha iyo pasina kukuvara kunoitika kune rabha pasi pemamiriro akatarwa ekukanganisa simba deformation, iyo inowanzo ratidza kusimba kwerabha kuti ishandiswe pakudziya kwakaderera uye kugona kwayo kutsungirira kukuvara.
(3) TR10 inoshandiswa kuongorora viscoelasticity uye crystallization mhedzisiro yerabha pane yakaderera tembiricha, uye kazhinji inoratidza yakaderera tembiricha apo chinhu cherabha chinogona kuchengetedza kupora kwayo.
(4) TGem inoshandisa torsional simbi waya ine inozivikanwa torsional inogara sechinhu chinonongedza kumonyanisa muenzaniso pakona yakakura, nepo tembiricha inodzikira, modulus yerabha inowedzera, kuoma kunowedzera, uye kona ye torsion inodzikira kusvika painongotenderera paTg. Iyo torsion angle yerabha zvinoenderana nekushanduka kwetembiricha inogona kuongorora kuita kwayo kwakadzika tembiricha, kazhinji ichiratidza tembiricha yakaderera apo rabha inochengetedza elasticity yayo.
2 FKM Tg, TR10 uye hukama pakati peTbri
Inowanzo shandiswa FKM yakaderera-kupisa embrittlement performance parameters ndeye Tg, TR10 uye Tbri, mutengesi anowanzo tora iyo parameter Tg uye TR10, ASTM inotora iyo parameter Tbri, pane mimwe misiyano uye hukama pakati pevatatu ava.
2. 1 Hukama huri pakati peTg neTR10
TR10 yegiredhi rega rega reFKM iri padyo neTg (musiyano hausi kupfuura 3 ℃), zvichiratidza kuti zvese Tg neTR10 zvinogona kuratidza yakaderera-tembiricha kufamba uye girazi mamiriro tembiricha yerabha molecular chain.
2.2 Hukama pakati peFKM fluorine yemukati uye yakaderera-tembiricha embrittlement zvivakwa
Mune zvakajairika mabhinari uye ternary FKM, TR10 inowedzera nekuwedzera kweiyo fluorine zvemukati; kana yechina monomer, PMVE, ikaunzwa, zvirimo zvine simba guru paTR10.
Zvirimo zvine simba guru paTR10. Kunyangwe kuwedzera kwehuwandu hwefluorine kunogona kuvandudza muganho wepamusoro weFKM tembiricha yekushandisa, asi panguva imwe chete, nekuda kweCF bond inotsiva iyo CH bond, ichideredza kupfava kweketani yemamorekuru uye kuderera-kupisa kuita kwerabha.
2.3 Kupesvedzera kwemafirita pane yakaderera-tembiricha embrittlement zvivakwa zveFKM makomponi.
Carbon dema N774 adhesive ine yakaderera Tbri uye yakanyanya kuderera-tembiricha kuramba; zinc oxide adhesive ine yakanyanya Tbri uye yakaipisisa yakaderera-kupisa kupikisa; iyo yakaderera-yekushisa embrittlement kushanda kwemhando shanu dzekunamatira haina kusiyana zvakanyanya. Mushure mekuongorora, mushure mekuwedzera mafirita akasiyana, gaka uye chimiro pakati peFKM molecular cheni dzakasiyana, uye inoenderana yakaderera-tembiricha embrittlement kuita kwakasiyana.
Mushure mekuongorora, mushure mekuwedzera mafirita akasiyana, mapeji uye zvimiro pakati peFKM molecular cheni zvakasiyana, uye inowirirana yakaderera-tembiricha embrittlement zvimiro zvakasiyana, uye iyo yekuzadza ine shoma shoma yerabha ine yakakura gel yemukati uye zvirinani kuderera-kupisa kupikisa.
2.4 Mhedzisiro yekusanganisa maitiro pane yakaderera-tembiricha embrittlement zvimiro zveFKM makomponi.
Iyo yekusanganisa maitiro zvakare ine mhedzisiro pane yakaderera-tembiricha embrittlement zvimiro zveFKM makomputa. Plasticizing isati yasanganiswa inogona kuwana rabha molecule inoshanduka zviri nani
Iyo yakaderera tembiricha yekudzivirira yekomboni inogona kuvandudzwa neplasticizing isati yasanganiswa. Mutete pfuura kurapwa mushure mekumisikidzwa kwekomboni kunogona kuvandudza zvivakwa zvemafirita uye anopindirana, uye kugadzirisa kushomeka kwekushisa. Kazhinji kutaura, iyo yakareba kuumbwa, inodzika iyo Mooney viscosity yerabha. Kuwedzera nhamba yenguva yekuumba kuchaderedza Tg yerubha, asi chiitiko chacho hachina kukosha, uye hapana mutsauko wakakosha pakati peTg neTbri yeFKM rubber ine nhamba yakasiyana yekuumba nguva.
3 Mhedziso
(1) Iyo Tg yeFKM iri padyo neiyo yeTR10, iyo inogona kuratidza yakaderera tembiricha kufamba kweFKM molecular cheni uye tembiricha yegirazi mamiriro, uye iyo Tbri yakaderera pane iyo yeTg uye TR10.
yakaderera pane Tg uye TR10.
(2) Iyo yakaderera tembiricha embrittlement chivakwa cheperoxide sulfurized yakakwira fluorine FKM iri nani, uye yakaderera tembiricha embrittlement pfuma ye bisphenol binary sulfurized FKM yakaipisisa.
(3) FKM rabha yakazadzwa nekabhoni nhema N774 ine nani yakaderera-tembiricha kuramba; rubber ine shoma shoma yekuzadza ine yakakwira gel yemukati uye zvirinani kuderera-tembiricha kuramba.
(4) Huwandu hwenguva dzekuumba hune mhedzisiro shoma pane yakaderera-tembiricha embrittlement pfuma yeFKM makomputa.
