1. Ukunamathela
Irabha ye-ethylene-propylene inamandla amancane ahlangene ngenxa yokuntuleka kwamaqembu asebenzayo esakhiweni sayo samangqamuzana.Ngaphezu kwalokho, irabha kulula ukuqhakaza, futhi ukuzinamathela kwayo kanye nokunamathelana kwayo kubi kakhulu.
Izinhlobonhlobo ze-Ethylene Propylene Rubber Modified
Njengoba irabha ye-EPDM kanye ne-EPDM yathuthukiswa ngempumelelo ngasekupheleni kwawo-1950 nasekuqaleni kwawo-1960, irabha eguquliwe ye-ethylene propylene kanye nerabha ye-thermoplastic ethylene propylene (njenge-EPDM/PE) iye yavela emhlabeni, ngaleyo ndlela ihlinzeka ngokusetshenziswa okubanzi kwerabha ye-ethylene propylene. inikeza izinhlobo eziningi namabanga.Irabha eguquliwe ye-ethylene-propylene ikakhulukazi ihlanganisa i-bromination, i-chlorination, i-sulfonation, i-anhydride yesilisa, i-anhydride ye-maleic, ukuguqulwa kwe-silicone, nokuguqulwa kwe-nylon yerabha ye-ethylene-propylene.Irabha ye-ethylene-propylene nayo ixhunyelelwe i-acrylonitrile, i-acrylate nokunye.Ngokuhamba kweminyaka, izinto eziningi ze-polymer ezinezakhiwo ezinhle eziphelele zitholwe ngokuhlanganisa, i-copolymerization, ukugcwalisa, ukuxhunyelelwa, ukuqinisa kanye nokuhlanganiswa kwamangqamuzana.Irabha ye-ethylene-propylene nayo iye yathuthukiswa kakhulu ekusebenzeni ngokuguqulwa, ngaleyo ndlela yandisa ububanzi bokusetshenziswa kwerabha ye-ethylene-propylene.
Irabha ye-ethylene propylene ene-brominated icutshungulwa nge-brominating agent emshinini ovulekile.Ngemva kwe-bromination, irabha ye-ethylene-propylene ingathuthukisa isivinini sayo sokuvuthwa kanye nokusebenza kokunamathela, kodwa amandla ayo okusebenza ayancipha, ngakho-ke irabha ye-ethylene-propylene e-brominated ifaneleka kuphela ungqimba oluphakathi lwerabha ye-ethylene-propylene namanye amarabha.
Irabha ene-chlorine ethylene propylene yenziwa ngokudlula igesi ye-chlorine ngesisombululo senjoloba se-EPDM.I-chlorination yerabha ye-ethylene-propylene ingakhuphula isivinini sokuvuthwa nokuhambisana nokungaxoxiswana okungagcwaliswanga, ukumelana nomlilo, ukumelana nowoyela, nokusebenza kokunamathela nakho kuyathuthukiswa.
Irabha ye-ethylene propylene e-sulfonated yenziwa ngokuncibilikisa irabha ye-EPDM ku-solvent bese iphatha nge-sulfonating agent kanye ne-neutraizing agent.Irabha ye-ethylene propylene e-Sulfonated izosetshenziswa kakhulu ezintweni ezinamathelayo, ezindwangu ezimboziwe, ukwakha inyama engenamanzi engenamanzi, kanye ne-anti-corrosion linings ngenxa yezakhiwo zayo ze-thermoplastic elastomer kanye nezakhiwo ezinhle zokunamathela.
Irabha ye-ethylene-propylene exhunyelelwe i-Acrylonitrile isebenzisa i-toluene njengesixazululi kanye ne-perchlorinated benzyl alcohol njengesiqalisi sokuxhunyelelwa i-acrylonitrile kurabha ye-ethylene-propylene ku-80°C.Irabha ye-ethylene-propylene eshintshiwe nge-Acrylonitrile ayigcini nje ngokugcina ukumelana nokugqwala kwerabha ye-ethylene-propylene, kodwa futhi ithola ukumelana nowoyela okulingana ne-nitrile-26, futhi inezinto ezingcono zomzimba nezomshini kanye nezakhiwo zokucubungula.
Irabha ye-Thermoplastic ethylene propylene (EPDM/PP) isekelwe ku-EPDM irabha ne-polypropylene ukuze kuxutshwe.Ngesikhathi esifanayo, iwumkhiqizo owenza irabha ye-ethylene-propylene ifinyelele izinga elilindelekile lokuphambana.Ayigcini nje ngokugcina izici ezingokwemvelo zerabha ye-ethylene-propylene ngokusebenza, kodwa futhi inokusebenza okuphawulekayo kobuchwepheshe bomjovo, ukukhishwa, ukubunjwa kokushaywa kanye ne-calendering ye-thermoplastics.
2. Ukuminyana okuphansi kanye nempahla yokugcwalisa ephezulu
Ukuminyana kwerabha ye-ethylene propylene iyirabha ephansi, futhi ukuminyana kwayo kungu-0.87.Ngaphezu kwalokho, inani elikhulu lamafutha lingagcwaliswa futhi kufakwe ama-fillers, ngakho-ke izindleko zemikhiqizo yenjoloba zingancishiswa, futhi ubungozi bentengo ephezulu yerabha eluhlaza ye-ethylene-propylene ingenziwa.Ngerabha ye-ethylene-propylene enenani eliphakeme le-Mooney, amandla angokwenyama kanye nemishini angancishiswa ngemva kokugcwalisa okuphezulu.hhayi enkulu.
3. Ukumelana nokugqwala
Ngenxa yokuntuleka kwe-polarity kanye nezinga eliphansi le-unsaturation yerabha ye-ethylene-propylene, inokumelana kahle namakhemikhali ahlukahlukene anjenge-alcohol, ama-acids, ama-alkali, ama-oxidants, amafriji, okokuhlanza, amafutha ezilwane nemifino, ama-ketones namafutha, njll. ;Kodwa kuzincibilikisi ze-aliphatic nezinephunga elimnandi (ezifana nophethiloli, benzene, njll.) kanye nokungaqini kahle kuwoyela wamaminerali.Ukusebenza kuzokwehla futhi ngaphansi kwesenzo sesikhathi eside se-asidi egxilile.Ku-ISO/TO 7620, cishe izinhlobo ezingama-400 zamakhemikhali egesi abolayo nawuketshezi ziqoqwa ezakhiweni zamarabha ahlukahlukene, futhi amabanga angu-1-4 acacisiwe ukukhombisa izinga lesenzo, kanye nomthelela wamakhemikhali abolayo ezimpahleni zenjoloba :
Izinga Lokuvuvukala Kwevolumu Yebanga/% Inani lokunciphisa Ukuqina Umphumela ekusebenzeni
1 <10 <10 kancane noma cha
2 10-20 <20 encane
3 30-60 <30 Okumaphakathi
4>60>30 ezinzima
4. Ukumelana nomhwamuko wamanzi
Irabha ye-ethylene-propylene inokumelana kahle nomhwamuko wamanzi futhi ilinganiselwa ukuthi ingcono kunokumelana nokushisa kwayo.Esitiyeni esishisa kakhulu ku-230°C, alukho ushintsho ekubukekeni ngemva cishe kwamahora ayi-100.Ngaphansi kwezimo ezifanayo, i-fluororubber, irabha ye-silicone, irabha ye-fluorosilicone, irabha ye-butyl, irabha ye-nitrile, nerabha yemvelo kuzoba nokuwohloka okusobala ekubukekeni ngemva kwesikhathi esifushane uma kuqhathaniswa.
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 njengoba uhlelo lwe-vulcanization lunoshintsho oluncane lwezakhiwo zemishini ngemva kokucwiliswa emanzini ashisa kakhulu ku-125 ° C izinyanga ezingu-15, futhi izinga lokunwetshwa kwevolumu liyi-0.3 kuphela%.
6. Izakhiwo zikagesi
Irabha ye-ethylene-propylene inezinto ezinhle kakhulu zokuvala ugesi kanye nokumelana ne-corona, futhi izakhiwo zayo zikagesi ziphakeme noma zisondele kunezo zenjoloba ye-styrene-butadiene, i-chlorosulfonated polyethylene, i-polyethylene kanye ne-polyethylene exhunywe ngokuphambana.
7. Ukuthambekela
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 kwerabha yemvelo kanye nerabha ye-butadiene, futhi isengakwazi ukugcina. it emazingeni okushisa aphansi.
8. 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, ukugcwaliswa kwamafutha kanye nokushisa kwegumbi.Imikhiqizo yerabha ye-ethylene-propylene ingasetshenziswa isikhathi eside ku-120°C, futhi ingasetshenziswa okwesikhashana noma ngezikhathi ezithile ku-150-200°C.Ukwengeza i-ejenti efanele yokulwa nokuguga kungakhuphula izinga lokushisa layo lesevisi.Ipayipi lerabha lerabha le-EPDM (ipayipi le-EPDM) elixhunywe nge-peroxide lingasetshenziswa ngaphansi kwezimo ezinzima.Ngaphansi kwezimo zokuhlushwa kwe-ozone ye-50pphm nokwelula kwe-30%, irabha ye-EPDM ingafinyelela ngaphezu kwe-150h ngaphandle kokuqhekeka.
Isikhathi sokuthumela: Mar-31-2023