1. Ubuningi obuphansi nokugcwalisa okuphezulu
Irabha ye-ethylene-propylene iyirabha enobukhulu obuphansi, enobukhulu obungu-0.87.Ngaphezu kwalokho, ingagcwaliswa ngenani elikhulu lamafutha kanye ne-EPDM.
Ukwengeza ama-filler kunganciphisa izindleko zemikhiqizo yenjoloba futhi kwenzele intengo ephezulu yerabha eluhlaza ye-ethylene propylene.Ngerabha ye-ethylene propylene enenani eliphakeme le-Mooney, amandla angokwenyama kanye nemishini yokugcwalisa okuphezulu awancishisiwe kakhulu.
2. Ukumelana nokuguga
Irabha ye-Ethylene-propylene inokumelana okuhle kakhulu kwesimo sezulu, ukumelana ne-ozone, ukumelana nokushisa, ukumelana ne-asidi ne-alkali, ukumelana nomhwamuko wamanzi, ukuzinza kombala, izakhiwo zikagesi, izakhiwo zokugcwalisa uwoyela kanye noketshezi lokushisa ekamelweni.Imikhiqizo yerabha ye-ethylene-propylene ingasetshenziswa isikhathi eside ku-120°C, futhi ingasetshenziswa isikhashana noma ngezikhathi ezithile ku-150-200°C.Ukwengeza ama-antioxidants afanelekile kungakhuphula izinga lokushisa lokusetshenziswa kwawo.Irabha ye-EPDM exhunywe nge-peroxide ingasetshenziswa ngaphansi kwezimo ezinzima.Irabha ye-EPDM ingafinyelela ngaphezu kwe-150h ngaphandle kokuqhekeka ngaphansi kwezimo zokuhlushwa kwe-ozone 50phm kanye no-30% ukwelula.
3. Ukumelana nokugqwala
Ngenxa yokuthi irabha ye-ethylene propylene ayinayo i-polarity kanye nezinga eliphansi le-unsaturation, inokumelana kahle namakhemikhali ahlukahlukene anjenge-alcohol, ama-acids, ama-alkali, ama-oxidants, iziqandisi, okokuhlanza, amafutha ezilwane nemifino, ama-ketone kanye namafutha.Kodwa inokungaqini kahle kwezincibilikisi ezinamafutha nezinuka kamnandi (ezifana nophethiloli, ibenzene, njll.) namafutha amaminerali.Ukusebenza kuzophinde kwehle ngaphansi kwesenzo sesikhathi eside se-asidi egxilile.Ku-ISO/TO 7620, cishe izinhlobo ezingama-400 zamakhemikhali egesi egqwala namanzi aqoqe ulwazi mayelana nezakhiwo zenjoloba ezihlukahlukene, futhi acacisa amazinga angu-1-4 ukuze abonise izinga lawo lesenzo, kanye nomthelela wamakhemikhali abolayo ezimpahleni zenjoloba.
Izinga Lokuvuvukala Kwevolumu Yebanga/% Inani lokunciphisa Ukuqina Umthelela ekusebenzeni
1 <10 <10 kancane noma cha
2 10-20 <20 encane
3 30-60 <30 medium
4>60>30 ezinzima
4. Ukumelana nomhwamuko wamanzi
Irabha ye-ethylene-propylene inokumelana kahle nomhwamuko wamanzi futhi ilinganiselwa ukuthi ingcono kunokumelana nokushisa kwayo.Ngo-230 ℃ umusi oshisa kakhulu, ukubukeka kwe-EPDM kwahlala kungashintshile ngemva cishe kwamahora angu-100.Kodwa-ke, ngaphansi kwezimo ezifanayo, irabha ye-fluorine, irabha ye-silicone, irabha ye-fluorosilicone, irabha ye-butyl, irabha ye-nitrile, nerabha yemvelo yaba nokuwohloka okukhulu ekubukekeni ngemva kwesikhathi esifushane.
5. Ukumelana namanzi ashisayo
Irabha ye-ethylene-propylene nayo inokumelana kangcono namanzi ashisayo, kodwa ihlobene eduze nazo zonke izinhlelo ze-vulcanization.Irabha ye-ethylene-propylene ene-dimorpholine disulfide kanye ne-TMTD njengesistimu ye-vulcanization, ngemva kokucwiliswa emanzini ashisa kakhulu ku-125 ° C izinyanga ezingu-15, izakhiwo zemishini zishintsha kancane kakhulu, futhi izinga lokukhulisa ivolumu liyi-0.3 kuphela%.
6. Ukusebenza kukagesi
Irabha ye-ethylene-propylene inezinto ezinhle kakhulu zokuvala ugesi kanye nokumelana ne-corona, futhi izakhiwo zayo zikagesi zingcono noma zisondele kulezo zenjoloba ye-styrene-butadiene, i-chlorosulfonated polyethylene, i-polyethylene kanye ne-polyethylene exhunywe ngokuphambana.
7. Ukuvumelana nezimo
Ngenxa yokuthi awekho ama-substituents we-polar esakhiweni samangqamuzana enjoloba ye-ethylene-propylene, amandla ahlangene we-molecule aphansi, futhi iketango lamangqamuzana lingakwazi ukugcina ukuguquguquka kwezinto ezihlukahlukene, okwesibili kuphela ku-rubber yemvelo exoxisanayo ne-butadiene, futhi isengaba. igcinwe emazingeni okushisa aphansi.
8. Ukunamathela
Irabha ye-ethylene-propylene ayinawo amaqembu asebenzayo ngenxa yesakhiwo sayo samangqamuzana futhi inamandla aphansi ahlangene.Ngaphezu kwalokho, irabha kulula ukuqhakaza, futhi ukuzinamathela kwayo kanye nokunamathelana kwayo kubi kakhulu.
Isikhathi sokuthumela: Nov-17-2021