1. Ukuncamathela
Irabha ye-ethylene-propylene inamandla aphantsi okubambisana ngenxa yokungabikho kwamaqela asebenzayo kwisakhiwo sayo se-molecular.Ukongeza, irabha kulula ukuqhakaza, kwaye ukuzincamathela kwayo kunye nokuncamathelana kubi kakhulu.
Ethylene Propylene Rubber Modified ezahlukeneyo
Ekubeni i-EPDM kunye ne-EPDM irabha zaphuhliswa ngempumelelo ekupheleni kwe-1950 kunye ne-1960 yokuqala, iindidi ze-ethylene propylene rubber kunye ne-thermoplastic ethylene propylene rubber ziye zavela kwihlabathi, ngaloo ndlela zibonelela ngokusetyenziswa okubanzi kwe-ethylene propylene rubber. inikeza iintlobo ezininzi kunye namabanga.Irabha ye-ethylene-propylene elungisiweyo ibandakanya i-bromination, i-chlorination, i-sulfonation, i-anhydride ye-maleic, i-anhydride ye-maleic, ukuguqulwa kwe-silicone, kunye nokuguqulwa kwe-nylon ye-rubber ye-ethylene-propylene.Irabha ye-ethylene-propylene nayo ihlonyelwe i-acrylonitrile, i-acrylate kunye nokunye.Ukutyhubela iminyaka, izinto ezininzi zepolymer ezineempawu ezintle ezibanzi zifunyenwe ngendlela yokudibanisa, i-copolymerization, ukuzaliswa, ukudibanisa, ukuqiniswa kunye nokuhlanganiswa kweemolekyuli.Irabha ye-ethylene-propylene nayo iphuculwe kakhulu ekusebenzeni ngokuguqulwa, ngaloo ndlela yandisa uluhlu lwesicelo serabha ye-ethylene-propylene.
Irabha ye-ethylene ye-propylene e-brominated icutshungulwa yi-brominating agent kwi-mill evulekile.Emva kwe-bromination, irabha ye-ethylene-propylene inokuphucula isantya se-vulcanization kunye nokusebenza kokunamathela, kodwa amandla ayo omatshini ayancipha, ngoko ke irabha ye-ethylene-propylene ilungele kuphela umaleko ophakathi werabha ye-ethylene-propylene kunye nezinye iirubha.
I-ethylene propylene rubber eyenziwe nge-chlorine yenziwe ngokudlula igesi ye-chlorine ngesisombululo serabha se-EPDM.I-chlorination yerabha ye-ethylene-propylene inokunyusa isantya se-vulcanization kunye nokuhambelana ne-unsaturated negotiable, ukumelana nomlilo, ukuxhathisa kweoli, kunye nokusebenza kokunamathela nazo ziphuculwe.
I-rubber ye-ethylene propylene e-Sulfonated yenziwe ngokuchithwa kwe-rubber ye-EPDM kwi-solvent kwaye iyiphathe nge-agent ye-sulfonating kunye ne-agent engathathi hlangothi.Irabha ye-ethylene propylene e-Sulfonated iya kusetyenziswa ngokubanzi kwizinto zokuncamathelisa, amalaphu agqunyiweyo, ukwakha inyama engenamanzi ebhityileyo, kunye ne-anti-corrosion linings ngenxa yeempawu zayo ze-thermoplastic elastomer kunye neempawu zokuncamathela ezilungileyo.
Irabha ye-ethylene-propylene ye-Acrylonitrile-grafted i-ethylene-propylene isebenzisa i-toluene njenge-solvent kunye ne-perchlorinated benzyl alcohol njengomqalisi wokudibanisa i-acrylonitrile kwirabha ye-ethylene-propylene kwi-80 ° C.I-Acrylonitrile-modified ethylene-propylene irabha ayigcini nje kuphela ukunyamezela ukubola kwerabha ye-ethylene-propylene, kodwa iphinda ifumane ukuxhathisa kweoli elingana ne-nitrile-26, kwaye ineempawu ezingcono zomzimba kunye noomatshini kunye neempawu zokucubungula.
Irubha ye-ethylene propylene ye-Thermoplastic (EPDM/PP) isekelwe kwirabha ye-EPDM kunye ne-polypropylene yokuxuba.Ngelo xesha, imveliso eyenza i-ethylene-propylene irabha ifikelele kwinqanaba elilindelekileyo lokuwela.Ayigcini nje kuphela iimpawu zendalo zerabha ye-ethylene-propylene ngokwemigaqo yokusebenza, kodwa ikwanokusebenza okumangalisayo kobuchwepheshe benaliti, i-extrusion, ukubumba ukuvuthela kunye ne-calendering ye-thermoplastics.
2. Uxinaniso oluphantsi kunye nepropathi yokuzaliswa okuphezulu
Ubuninzi berabha ye-ethylene propylene yirabha ephantsi, kwaye ukuxinwa kwayo yi-0.87.Ukongezelela, inani elikhulu leoli linokuzaliswa kwaye iifayili zinokongezwa, ngoko ixabiso leemveliso zerabha linokuncitshiswa, kwaye ukungonakali kwexabiso eliphezulu le-ethylene-propylene irabha yerabha eluhlaza inokwenziwa.I-rubber ye-ethylene-propylene enexabiso eliphezulu le-Mooney, amandla omzimba kunye nomatshini angancitshiswa emva kokuzaliswa okuphezulu.hayi mkhulu.
3. Ukumelana nokubola
Ngenxa yokunqongophala kwe-polarity kunye neqondo eliphantsi le-unsaturation yerabha ye-ethylene-propylene, inokumelana kakuhle neekhemikhali ezahlukeneyo ze-polar ezifana ne-alcohols, i-acids, i-alkalis, i-oxidants, i-refrigerants, i-detergents, i-oyile yezilwanyana kunye nemifuno, i-ketones kunye namafutha, njl. ;Kodwa kwi-aliphatic kunye ne-aromatics solvents (efana ne-petroli, i-benzene, njl.) kunye nozinzo olubi kwioli ye-mineral.Ukusebenza kuya kuncipha phantsi kwesenzo sexesha elide le-asidi egxininisiweyo.Kwi-ISO/TO 7620, phantse iindidi ezingama-400 zerhasi eyonakalisayo kunye neekhemikhali ezilulwelo ziqokelelwa kwiipropathi zeerabha ezahlukeneyo, kwaye amabanga e-1-4 acacisiwe ukubonisa inqanaba lesenzo, kunye nefuthe leekhemikhali ezonakalisayo kwiipropathi zerabha:
Ireyithi yeBanga lokuDumba uMqulu/% Ixabiso lokunciphisa ubulukhuni Impembelelo ekusebenzeni
1 <10 <10 kancinci okanye akukho
2 10-20 <20 encinci
3 30-60 <30 Phakathi
4 >60 >30 ezinzima
4. Ukumelana nomphunga wamanzi
Irabha ye-ethylene-propylene inokumelana nomphunga obalaseleyo wamanzi kwaye iqikelelwa ukuba ingcono kunokumelana nobushushu bayo.Kwi-steam eshushu kakhulu kwi-230 ° C, akukho tshintsho kwimbonakalo emva kweeyure eziphantse zibe yi-100.Ngaphantsi kweemeko ezifanayo, i-fluororubber, irabha ye-silicone, irabha ye-fluorosilicone, irabha ye-butyl, irabha ye-nitrile, kunye nerubha yendalo iya kuba nokuwohloka okucacileyo kwimbonakalo emva kwexesha elifutshane.
5. Ukumelana namanzi ashushu
Irabha ye-ethylene-propylene nayo inokumelana bhetele namanzi ashushu kakhulu, kodwa inxulumene ngokusondeleyo kuzo zonke iinkqubo ze-vulcanization.Irabha ye-ethylene-propylene kunye ne-dimorpholine disulfide kunye ne-TMTD njengoko inkqubo ye-vulcanization inotshintsho oluncinci kwiipropati zomatshini emva kokucwiliswa kwamanzi ashushu kakhulu kwi-125 ° C kwiinyanga ze-15, kwaye izinga lokwandiswa kwevolumu yi-0.3 kuphela.
6. Iimpawu zombane
Irabha ye-ethylene-propylene inezixhobo ezigqwesileyo zokufakelwa kombane kunye nokumelana ne-corona, kwaye iipropathi zayo zombane ziphezulu okanye zisondele kwirabha ye-styrene-butadiene, i-chlorosulfonated polyethylene, i-polyethylene kunye ne-polyethylene edibeneyo.
7. Ukolula
Ngenxa yokuba akukho zixhobo ze-polar kwisakhiwo se-molecular ye-rubber ye-ethylene-propylene, amandla adibeneyo e-molecule aphantsi, kwaye i-molecular chain chain ingakwazi ukugcina ukuguquguquka kuluhlu olubanzi, okwesibini kuphela kwi-rubber yendalo kunye ne-butadiene irabha, kwaye isakwazi ukugcina. kumaqondo obushushu aphantsi.
8. Ukumelana nokuguga
Irabha ye-ethylene-propylene inokumelana nemozulu ebalaseleyo, ukumelana ne-ozone, ukumelana nobushushu, ukuxhathisa kwe-asidi kunye ne-alkali, ukuxhathisa komphunga wamanzi, ukuzinza kombala, iipropati zombane, ukuzaliswa kweoli kunye nobushushu begumbi.Iimveliso zerabha ze-ethylene-propylene zingasetyenziselwa ixesha elide kwi-120 ° C, kwaye zingasetyenziswa okwethutyana okanye ngokuphindaphindiweyo kwi-150-200 ° C.Ukongeza i-agent echasene nokuguga inokunyusa ubushushu benkonzo yayo.I-hose ye-rubber ye-EPDM yeklasi yokutya (i-EPDM hose) edibeneyo kunye ne-peroxide ingasetyenziswa phantsi kweemeko ezinzima.Ngaphantsi kweemeko zoxinzelelo lwe-ozone ye-50pphm kunye nokwelula kwe-30%, i-rubber ye-EPDM inokufikelela ngaphezu kwe-150h ngaphandle kokuqhekeka.
Ixesha lokuposa: Mar-31-2023