Litšobotsi tsa rabara ea EPDM ke life?

1. Boima bo tlaase le ho tlatsa holimo
Ethylene-propylene rabara ke rabara e nang le boima bo tlaase, e nang le boima ba 0,87. Ho phaella moo, e ka tlatsoa ka oli e ngata le EPDM.
Ho kenyelletsa li-filler ho ka fokotsa litšenyehelo tsa lihlahisoa tsa rabara le ho etsa theko e phahameng ea rabara e tala ea ethylene propylene. Bakeng sa rabara ea ethylene propylene e nang le boleng bo phahameng ba Mooney, matla a 'mele le a mechine a ho tlatsa holimo ha a fokotsehe haholo.

2. Ho hanyetsa botsofali
Ethylene-propylene rabara e na le khanyetso e ntle ea boemo ba leholimo, ho hanyetsa ozone, ho hanyetsa mocheso, ho hanyetsa acid le alkali, ho hanyetsa mouoane oa metsi, botsitso ba mebala, thepa ea motlakase, thepa ea ho tlatsa oli le mokelikeli ka mocheso oa kamore. Lihlahisoa tsa rabara ea ethylene-propylene li ka sebelisoa nako e telele ho 120 ° C, 'me li ka sebelisoa nakoana kapa ka linako tse ling ho 150-200 ° C. Ho eketsa li-antioxidants tse loketseng ho ka eketsa mocheso oa tšebeliso ea eona. Rabara ea EPDM e kopantsoeng le peroxide e ka sebelisoa tlas'a maemo a thata. Rabara ea EPDM e ka fihla ho feta 150h ntle le ho phunyeha tlas'a maemo a ozone concentration 50phm le 30% e otlollang.

3. Ho hanyetsa kutu
Hobane rabara ea ethylene propylene e haelloa ke polarity le tekanyo e tlase ea ho se sebetse hantle, e na le khanyetso e ntle ho lik'hemik'hale tse fapaneng tsa polar tse kang alcohols, acids, alkalis, oxidants, refrigerants, detergents, liphoofolo le oli ea meroho, ketone le mafura. Empa e na le botsitso bo fokolang ho lihlapolli tse mafura le tse nkhang hamonate (tse kang peterole, benzene, joalo-joalo) le oli ea liminerale. Ts'ebetso e tla fokotseha hape tlasa ts'ebetso ea nako e telele ea asiti e kopaneng. Ho ISO/TO 7620, hoo e ka bang mefuta e 400 ea lik'hemik'hale tse senyang le tse nang le metsi li bokelletse tlhahisoleseling mabapi le thepa e fapaneng ea rabara, 'me li hlalositse maemo a 1-4 ho bonts'a boemo ba ts'ebetso ea tsona, le phello ea lik'hemik'hale tse senyang thepa ea rabara.

Sekhahla sa ho ruruha ha Bolumo ba Kereiti/% Boleng ba ho theola boima ba 'mele Tšusumetso mosebetsing
1 <10 <10 e nyane kapa che
2 10-20 <20 e nyane
3 30-60 <30 mahareng
4>60>30 boima

4. Ho hanyetsa mouoane oa metsi
Ethylene-propylene rabara e na le matla a ho hanyetsa mouoane oa metsi 'me ho hakanngoa hore e betere ho feta mocheso oa eona oa mocheso. Ka 230 ℃ mouoane o chesang haholo, ponahalo ea EPDM e ile ea lula e sa fetohe ka mor'a hoo e ka bang 100h. Leha ho le joalo, tlas'a maemo a tšoanang, rabara ea fluorine, rabara ea silicone, rabara ea fluorosilicone, rabara ea butyl, rabara ea nitrile, le rabara ea tlhaho li ile tsa senyeha haholo ka ponahalo ka mor'a nako e khutšoanyane.

5. Ho hanyetsa metsi a chesang haholo
Ethylene-propylene rabara e boetse e na le khanyetso e ntle ho metsi a chesang haholo, empa e amana haufi-ufi le mekhoa eohle ea vulcanization. Ethylene-propylene rabara e nang le dimorpholine disulfide le TMTD e le tsamaiso ea vulcanization, ka mor'a ho qoelisoa metsing a chesang ka ho fetisisa ka 125 ° C bakeng sa likhoeli tsa 15, thepa ea mechine e fetoha e nyenyane haholo, 'me sekhahla sa ho atolosa molumo ke 0.3 feela%.

6. Ts'ebetso ea motlakase
Ethylene-propylene rabara e na le thepa e babatsehang ea ho kenya motlakase le ho hanyetsa corona, 'me thepa ea eona ea motlakase e molemo ho feta kapa e haufi le ea rabara ea styrene-butadiene, chlorosulfonated polyethylene, polyethylene le polyethylene e amanang le sefapano.

7. Ho tenyetseha
Hobane ha ho na li-substituents tsa polar mohahong oa limolek'hule tsa rabara ea ethylene-propylene, matla a kopantsoeng a molek'hule a tlaase, 'me ketane ea molek'hule e ka boloka ho feto-fetoha ha maemo ka mefuta e mengata, ea bobeli feela ho ea ho rabara ea tlhaho le butadiene,' me e ntse e ka ba teng. e bolokiloe ka mocheso o tlase.

8. Ho khomarela
Rabara ea ethylene-propylene ha e na lihlopha tse sebetsang ka lebaka la sebopeho sa eona sa molek'hule 'me e na le matla a tlaase a kopanetsoeng. Ho phaella moo, rabara e bonolo ho thunya, 'me ho ikamahanya ha eona le ho khomarela ka bobeli ho futsanehile haholo.