1. Kumamatira
Ethylene-propylene rabara imakhala ndi mphamvu zochepa zogwirizanitsa chifukwa cha kusowa kwa magulu okhudzidwa mu kapangidwe kake ka maselo.Kuphatikiza apo, mphirayo ndi wosavuta kuphuka, ndipo kudzimangiriza kwake komanso kumamatira ndizovuta kwambiri.
Ethylene Propylene Rubber Zosintha Zosiyanasiyana
Popeza mphira wa EPDM ndi EPDM adapangidwa bwino kumapeto kwa zaka za m'ma 1950 ndi koyambirira kwa zaka za m'ma 1960, mphira wosinthika wa ethylene propylene ndi mphira wa thermoplastic ethylene propylene (monga EPDM/PE) adawonekera padziko lapansi, motero akupereka Kugwiritsidwa ntchito kwakukulu kwa mphira wa ethylene propylene. imapereka mitundu yambiri komanso masukulu.Rabara yosinthidwa ya ethylene-propylene makamaka imaphatikizapo bromination, chlorination, sulfonation, maleic anhydride, maleic anhydride, silicone modification, ndi kusintha kwa nayiloni kwa rabara ya ethylene-propylene.Rabara ya ethylene-propylene ilinso ndi acrylonitrile, acrylate ndi zina zotero.Kwa zaka zambiri, zida zambiri za polima zokhala ndi zinthu zabwino zonse zapezedwa pophatikiza, copolymerization, kudzaza, kulumikiza, kulimbikitsa komanso kuphatikiza ma cell.Ethylene-propylene rabara yasinthidwanso kwambiri pakugwira ntchito mwakusintha, potero kukulitsa kuchuluka kwa mphira wa ethylene-propylene.
mphira wa brominated ethylene propylene umakonzedwa ndi brominating agent pa mphero yotseguka.Pambuyo bromination, ethylene-propylene mphira akhoza kusintha vulcanization liwiro ndi adhesion ntchito, koma mawotchi mphamvu amachepetsa, kotero brominated ethylene-propylene mphira ndi oyenera wosanjikiza mkhalapakati wa mphira ethylene-propylene ndi rubbers ena.
Rabala ya chlorine ethylene propylene imapangidwa podutsa mpweya wa chlorine kudzera munjira ya rabala ya EPDM.Kuphatikizika kwa mphira wa ethylene-propylene kumatha kukulitsa kuthamanga kwa vulcanization ndikulumikizana ndi unsaturated negotiable, kukana lawi lamoto, kukana kwamafuta, komanso magwiridwe antchito amawongoleredwa.
Sulfonated ethylene propylene rabara amapangidwa ndi Kusungunuka EPDM mphira mu zosungunulira ndi kuchiza ndi sulfonating wothandizira ndi neutralizing wothandizira.Rabara ya sulfonated ethylene propylene idzagwiritsidwa ntchito kwambiri mu zomatira, nsalu zokutira, kumanga nyama yowonda yosalowa madzi, ndi zomangira zoteteza ku dzimbiri chifukwa cha mawonekedwe ake a thermoplastic elastomer komanso zomatira zabwino.
Acrylonitrile-grafted ethylene-propylene rabara amagwiritsa ntchito toluene monga zosungunulira ndi perchlorinated benzyl mowa monga initiator kumezanitsa acrylonitrile pa ethylene-propylene mphira pa 80 ° C.Acrylonitrile-modified ethylene-propylene rabara sikuti imangokhala ndi kukana kwa dzimbiri kwa mphira wa ethylene-propylene, komanso imapeza kukana kwamafuta kofanana ndi nitrile-26, ndipo imakhala ndi zinthu zabwino zakuthupi ndi zamakina komanso kukonza zinthu.
Thermoplastic ethylene propylene rabara (EPDM/PP) imachokera ku mphira wa EPDM ndi polypropylene posakaniza.Nthawi yomweyo, ndi chinthu chomwe chimapangitsa mphira wa ethylene-propylene kufika pamlingo woyembekezeka wowoloka.Sikuti amangosungabe mawonekedwe a mphira wa ethylene-propylene potengera momwe amagwirira ntchito, komanso amakhala ndi luso laukadaulo la jakisoni, extrusion, kuumba nkhonya ndi calendering ya thermoplastics.
2. Kutsika kochepa komanso katundu wodzaza kwambiri
Kachulukidwe wa mphira wa ethylene propylene ndi mphira wotsika, ndipo kachulukidwe ake ndi 0,87.Kuonjezera apo, mafuta ochuluka amatha kudzazidwa ndi zodzaza zikhoza kuwonjezeredwa, kotero kuti mtengo wamtengo wapatali wa mphira ukhoza kuchepetsedwa, ndipo kuipa kwa mtengo wapamwamba wa mphira wa ethylene-propylene mphira waiwisi ukhoza kupangidwira.Kwa mphira wa ethylene-propylene wokhala ndi mtengo wapamwamba wa Mooney, mphamvu yakuthupi ndi yamakina imatha kuchepetsedwa pambuyo podzaza kwambiri.osati chachikulu.
3. Kukana dzimbiri
Chifukwa chosowa polarity ndi otsika digiri unsaturation wa mphira ethylene-propylene, ali bwino kukana zosiyanasiyana polar mankhwala monga alcohols, zidulo, alkalis, okosijeni, refrigerants, zotsukira, nyama ndi masamba mafuta, ketoni ndi mafuta, etc. ;Koma mu aliphatic ndi onunkhira solvents (monga mafuta, benzene, etc.) ndi osauka bata mu mchere mafuta.Kuchitako kudzatsikanso pansi pakuchita kwanthawi yayitali kwa asidi wokhazikika.Mu ISO/TO 7620, pafupifupi mitundu 400 yamafuta owononga mpweya ndi madzi amasonkhanitsidwa pamitengo ya mphira zosiyanasiyana, ndipo magiredi 1-4 amafotokozedwa kuti awonetse kuchuluka kwa zomwe zikuchitika, komanso kukhudzika kwa mankhwala owononga pamitengo ya rabara:
Gawo la Kutupa kwa Voliyumu /% Kuchepetsa Kuuma kwa mtengo Zotsatira pakuchita bwino
1 <10 <10 pang'ono kapena ayi
2 10-20 <20 zochepa
3 30-60 <30 Wapakati
4>60>30 kwambiri
4. Kukana kwa nthunzi wa madzi
Rabara ya ethylene-propylene imakhala ndi mphamvu yolimbana ndi nthunzi yamadzi ndipo imati ndi yabwino kuposa kukana kutentha kwake.Mu nthunzi yotentha kwambiri pa 230 ° C, palibe kusintha kwa mawonekedwe pambuyo pa maola pafupifupi 100.Pazifukwa zomwezo, mphira wa fluororubber, rabara ya silikoni, labala ya fluorosilicone, labala ya butyl, labala ya nitrile, ndi mphira wachilengedwe zidzawoneka kuwonongeka pakapita nthawi yochepa.
5. Kukana madzi otentha kwambiri
Ethylene-propylene rabara imakhalanso yabwino kukana madzi otentha kwambiri, koma imagwirizana kwambiri ndi machitidwe onse a vulcanization.Ethylene-propylene rabara ndi dimorpholine disulfide ndi TMTD monga vulcanization dongosolo ali ndi kusintha pang'ono mu makina katundu pambuyo ankawaviika m'madzi otentha kwambiri pa 125 ° C kwa miyezi 15, ndi voliyumu kukulitsa mlingo ndi 0.3% yokha.
6. Mphamvu zamagetsi
Ethylene-propylene rabara imakhala ndi mphamvu zabwino kwambiri zotchinjiriza magetsi komanso kukana kwa corona, ndipo mphamvu zake zamagetsi ndizoposa kapena kuyandikira za rabara ya styrene-butadiene, chlorosulfonated polyethylene, polyethylene ndi polyethylene yolumikizana ndi mtanda.
7. Kusangalala
Chifukwa palibe ma polar olowa m'malo a mphira wa ethylene-propylene, mphamvu yolumikizana ya molekyulu imakhala yotsika, ndipo unyolo wa mamolekyulu ukhoza kukhalabe wosinthika mosiyanasiyana, wachiwiri kwa rabala wachilengedwe ndi mphira wa butadiene, ndipo amathabe kukhalabe. pa kutentha kochepa.
8. Kukana kukalamba
Rabara ya ethylene-propylene imakhala ndi kukana kwanyengo yabwino, kukana kwa ozoni, kukana kutentha, asidi ndi kukana kwa alkali, kukana kwa nthunzi wamadzi, kukhazikika kwamtundu, mphamvu zamagetsi, kudzaza mafuta ndi kutentha kwachipinda.Mankhwala a rabara a ethylene-propylene amatha kugwiritsidwa ntchito kwa nthawi yayitali pa 120 ° C, ndipo atha kugwiritsidwa ntchito kwakanthawi kapena pang'onopang'ono pa 150-200 ° C.Kuonjezera odana ndi ukalamba wothandizira akhoza kuonjezera kutentha kwa utumiki wake.Food grade EPDM rabara hose (EPDM hose) yolumikizidwa ndi peroxide ingagwiritsidwe ntchito pamavuto.Pansi pazikhalidwe za ozoni ndende ya 50pphm ndi kutambasula kwa 30%, mphira wa EPDM ukhoza kufika kupitirira 150h popanda kusweka.
Nthawi yotumiza: Mar-31-2023