1. Ho khomarela
Rabara ea ethylene-propylene e na le matla a tlaase a kopantsoeng ka lebaka la ho haella ha lihlopha tse sebetsang ka mokhoa oa eona oa limolek'hule.Ho phaella moo, rabara e bonolo ho thunya, 'me ho ikamahanya ha eona le ho khomarela ka bobeli ho futsanehile haholo.
Mefuta e Fetisitsoeng ea Rabara ea Ethylene Propylene
Kaha rabara ea EPDM le EPDM li ile tsa ntlafatsoa ka katleho ho elella bofelong ba lilemo tsa bo-1950 le mathoasong a lilemo tsa bo-1960, mefuta e fapaneng ea rabara ea ethylene propylene e fetotsoeng le thermoplastic ethylene propylene rabara (e kang EPDM/PE) e hlahile lefatšeng, kahoo e fana ka Tšebeliso e pharaletseng ea rabara ea ethylene propylene. e fana ka mefuta e mengata le limaraka.Rabara e fetotsoeng ea ethylene-propylene haholo-holo e kenyelletsa bromination, chlorination, sulfonation, maleic anhydride, maleic anhydride, silicone modification, le phetoho ea nylon ea rabara ea ethylene-propylene.Ethylene-propylene rabara e boetse e kentse acrylonitrile, acrylate joalo-joalo.Ho theosa le lilemo, lisebelisoa tse ngata tsa polymer tse nang le thepa e ntle e felletseng li 'nile tsa fumanoa ka ho kopanya, copolymerization, ho tlatsa, ho hlomathisa, ho matlafatsa le ho kopanya limolek'hule.Ethylene-propylene rabara le eona e ntlafalitsoe haholo ts'ebetsong ka ho fetoloa, ka hona ho atolosoa mefuta e mengata ea rabara ea ethylene-propylene.
Brominated ethylene propylene rabara e sebetswa ke brominating agent hodima leloala le bulehileng.Ka mor'a bromination, ethylene-propylene rabara ka ntlafatsa vulcanization lona lebelo le adhesion tshebetso, empa matla a eona a mechine e fokotseha, kahoo brominated ethylene-propylene rabara ke feela a loketse bakeng sa lera intermediary ea ethylene-propylene rabara le rabara tse ling.
Rabara ea chlorinated ethylene propylene e entsoe ka ho fetisa khase ea chlorine ka tharollo ea rabara ea EPDM.Chlorination ea rabara ea ethylene-propylene e ka eketsa lebelo la vulcanization le ho ikamahanya le puisano e sa tsitsang, ho hanyetsa lelakabe, ho hanyetsa oli, le ts'ebetso ea ho khomarela le tsona li ntlafalitsoe.
Sulfonated ethylene propylene rabara e entsoe ka ho qhaqha rabara ea EPDM ka har'a motsoako le ho e phekola ka sulfonating agent le neutralizing agent.Sulfonated ethylene propylene rabara e tla sebelisoa haholo ho likhomaretsi, masela a koahetsoeng, ho aha nama e sa keneleng metsi e se nang metsi, le masela a anti-corrosion ka lebaka la thepa ea eona ea thermoplastic elastomer le thepa e ntle ea ho khomarela.
Acrylonitrile-grafted ethylene-propylene rabara e sebelisa toluene e le solvent le perchlorinated benzyl joala e le selelekela sa ho hlomathisa acrylonitrile holim'a rabara ea ethylene-propylene ka 80°C.Acrylonitrile-modified ethylene-propylene rabara ha e boloke feela ho hanyetsa ha kutu ea rabara ea ethylene-propylene, empa hape e fumana ho hanyetsa oli ho lekanang le nitrile-26, 'me e na le thepa e ntle ea' mele le ea mechine le thepa ea ho sebetsa.
Thermoplastic ethylene propylene rabara (EPDM/PP) e thehiloe ho rabara ea EPDM le polypropylene bakeng sa ho kopanya.Ka nako e ts'oanang, ke sehlahisoa se etsang hore rabara ea ethylene-propylene e fihle boemong bo lebeletsoeng ba ho tšela.Ha e boloke feela litšoaneleho tsa tlhaho tsa rabara ea ethylene-propylene mabapi le ts'ebetso, empa hape e na le ts'ebetso e makatsang ea theknoloji ea ente, extrusion, ho bopa ho otla le calendering ea thermoplastics.
2. Boima bo tlaase le thepa e phahameng ea ho tlatsa
Boima ba rabara ea ethylene propylene ke rabara e tlase, 'me boima ba eona ke 0.87.Ho phaella moo, oli e ngata e ka tlatsoa 'me li-fillers li ka eketsoa, ka hona litšenyehelo tsa lihlahisoa tsa rabara li ka fokotsoa, 'me ho senyeha ha theko e phahameng ea rabara e tala ea ethylene-propylene ho ka etsoa.Bakeng sa rabara ea ethylene-propylene e nang le boleng bo phahameng ba Mooney, matla a 'mele le a mechine a ka fokotsoa ka mor'a ho tlatsa holimo.eseng kholo.
3. Ho hanyetsa kutu
Ka lebaka la khaello ea polarity le tekanyo e tlase ea unsaturation ea rabara ea ethylene-propylene, e na le khanyetso e ntle ho lik'hemik'hale tse fapaneng tsa polar tse kang joala, li-acids, alkalis, li-oxidants, lihatsetsi, li-detergents, oli ea liphoofolo le meroho, ketone le mafura, joalo-joalo. ;Empa ka li-solvents tsa aliphatic le tse nkhang hamonate (tse kang peterole, benzene, joalo-joalo) le botsitso bo bobe ba oli ea diminerale.Tshebetso e tla boela e fokotsehe tlas'a ketso ea nako e telele ea acid e tsitsitseng.Ho ISO/TO 7620, hoo e ka bang mefuta e 400 ea lik'hemik'hale tse senyang le tse nang le metsi li bokelloa meahong ea liraba tse fapaneng, 'me limaraka tse 1-4 li hlalositsoe ho bonts'a boemo ba ts'ebetso, le phello ea lik'hemik'hale tse senyang thepa ea rabara:
Sekhahla sa ho ruruha ha Bolumo ba Kereiti/% Boleng ba ho fokotsa boima Phello tšebetsong
1 <10 <10 e nyane kapa ha e eo
2 10-20 <20 e nyane
3 30-60 <30 E itekanetseng
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 mouoane o chesang haholo ka 230 ° C, ha ho na phetoho ponahalong ka mor'a lihora tse ka bang 100.Tlas'a maemo a tšoanang, rabara ea fluororubber, rabara ea silicone, rabara ea fluorosilicone, rabara ea butyl, rabara ea nitrile, le rabara ea tlhaho li tla senyeha ka mokhoa o hlakileng ponahalong 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.Rabara ea ethylene-propylene e nang le dimorpholine disulfide le TMTD ha tsamaiso ea vulcanization e na le phetoho e fokolang ea thepa ea mochine ka mor'a ho kenngoa metsing a chesang ka ho fetisisa ho 125 ° C bakeng sa likhoeli tsa 15, 'me sekhahla sa ho atolosa molumo ke 0.3% feela.
6. Thepa 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 phahametse kapa e haufi le ea rabara ea styrene-butadiene, chlorosulfonated polyethylene, polyethylene le polyethylene e amanang le sefapano.
7. Boithabiso bo matla
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 rabara ea tlhaho le rabara ea butadiene,' me e ntse e ka boloka. ka mocheso o tlase.
8. Ho hanyetsa botsofali
Ethylene-propylene rabara e na le khanyetso e ntle ea boemo ba leholimo, ho hanyetsa ozone, ho hanyetsa mocheso, acid le alkali resistance, ho hanyetsa mouoane oa metsi, botsitso ba mebala, thepa ea motlakase, ho tlatsa oli le mocheso oa mocheso oa kamoreng.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 moemeli ea thibelang botsofali ho ka eketsa mocheso oa eona oa tšebeletso.Sekhahla sa lijo sa EPDM rabara hose (EPDM hose) se kopantsoeng le peroxide se ka sebelisoa tlas'a maemo a thata.Tlas'a maemo a mahloriso a ozone a 50pphm le ho otlolla 30%, rabara ea EPDM e ka fihla ho feta 150h ntle le ho senya.
Nako ea poso: Mar-31-2023