Lisebelisoa tse tloaelehileng tsa rabara——Tšobotsi ea EPDM
Molemo:
Ho hanyetsa botsofali hantle haholo, ho hanyetsa boemo ba leholimo, ho thibela motlakase, ho hanyetsa ho bola ha lik'hemik'hale le ho tenyetseha ha tšusumetso.
Mathata:
Lebelo le liehang la ho phekola; Ho thata ho kopanya le lirabara tse ling tse sa koaheloang, 'me ho ikamahanya le ho khomarelana ha tsona ho fokola haholo, kahoo ts'ebetso ea ts'ebetso e mpe.
Ningbo Yokey Automotive Parts Co., Ltd e shebane le ho rarolla mathata a thepa ea rabara ea bareki le ho rala mekhoa e fapaneng ea thepa ho latela maemo a fapaneng a ts'ebeliso.
Thepa: lintlha tse qaqileng
1. Boima bo tlase le ho tlatsa ho hoholo
Rabara ea propylene ea ethylene ke mofuta oa rabara e nang le boima bo tlase ba 0.87. Ho phaella moo, oli e ngata e ka tlatsoa 'me ho ka eketsoa li-filler, e leng se ka fokotsang litšenyehelo tsa lihlahisoa tsa rabara le ho etsa hore theko e phahameng ea rabara e tala ea rabara ea propylene ea ethylene e be theko e phahameng. Ho phaella moo, bakeng sa rabara ea propylene ea ethylene e nang le boleng bo phahameng ba Mooney, matla a 'mele le a mechini ka mor'a ho tlatsa haholo a ke ke a fokotseha haholo.
2. Khanyetso ea botsofali
Rabara ea propylene ea ethylene e na le khanyetso e ntle ea boemo ba leholimo, khanyetso ea ozone, khanyetso ea mocheso, khanyetso ea asiti le alkali, khanyetso ea mouoane oa metsi, botsitso ba 'mala, ts'ebetso ea motlakase, ho tlatsa oli le ho phalla ha mocheso oa kamore. Lihlahisoa tsa rabara ea propylene ea ethylene li ka sebelisoa nako e telele ho 120 ℃, 'me li ka sebelisoa ka nakoana kapa ka linako tse ling ho 150 - 200 ℃. Mocheso oa tšebeliso o ka eketsoa ka ho eketsa antioxidant e loketseng. EPDM e kopantsoeng le peroxide e ka sebelisoa tlas'a maemo a thata. Ha mahloriso a ozone a EPDM e le 50 pphm 'me nako ea ho otlolla e le 30%, EPDM e ka fihla lihora tse 150 ntle le ho petsoha.
3. Khanyetso ea ts'enyeho
Ka lebaka la khaello ea polarity le ho se khore ha rabara ea ethylene propylene, e na le khanyetso e ntle ho lik'hemik'hale tse fapaneng tsa polar tse kang joala, asiti, alkali, oxidant, refrigerant, sesepa, oli ea liphoofolo le ea meroho, ketone le mafura; Leha ho le joalo, e na le botsitso bo fokolang ho li-solvent tse mafura le tse nkhang hamonate (joalo ka peterole, benzene, jj.) le oli ea diminerale. Tshebetso le eona e tla fokotseha tlas'a ketso ea nako e telele ea asiti e kopaneng. Ho ISO/TO 7620, lintlha mabapi le litlamorao tsa lik'hemik'hale tse ka bang 400 tse senyang tsa gaseous le liquid holim'a thepa ea li-raber tse fapaneng lia bokelloa, 'me lihlopha tsa 1-4 li boletsoe ho bontša litlamorao tsa tsona. Litlamorao tsa lik'hemik'hale tse senyang holim'a thepa ea li-raber ke tse latelang:
Phello ea Sekhahla sa ho Ruruha ha Bophahamo/% ea ho Fokotsa ho Tiea ha Matla Thepeng
1<10<10 E nyane kapa ha e eo
2 10-20<20 tse nyane
3 30-60<30 Bohareng
4>60>30 e tebileng
4. Khanyetso ea mouoane oa metsi
EPDM e na le khanyetso e ntle ea mouoane 'me ho hakanngoa hore e phahametse khanyetso ea eona ea mocheso. Moeeng o chesang haholo oa 230 ℃, ponahalo ha e fetohe kamora lihora tse ka bang 100. Leha ho le joalo, tlas'a maemo a tšoanang, ponahalo ea rabara ea fluorine, rabara ea silicon, rabara ea fluorosilicone, rabara ea butyl, rabara ea nitrile le rabara ea tlhaho li ile tsa senyeha haholo ka nako e khuts'oane.
5. Ho hanyetsa metsi a chesang haholo
Rabara ea propylene ea ethylene le eona e na le khanyetso e ntle ho metsi a chesang haholo, empa e amana haufi-ufi le litsamaiso tsohle tsa vulcanization. Thepa ea mechini ea rabara ea ethylene propylene (EPR) e qhibilihisitsoeng ka dimorphine disulfide le TMTD ha ea ka ea fetoha haholo ka mor'a ho qoelisoa metsing a futhumetseng haholo a 125 ℃ ka likhoeli tse 15, 'me sekhahla sa katoloso ea bophahamo e ne e le 0.3% feela.
6. Tshebetso ya motlakase
Rabara ea propylene ea ethylene e na le tšireletso e ntle ea motlakase le ho hanyetsa corona, 'me thepa ea eona ea motlakase e phahametse kapa e batla e tšoana le ea rabara ea styrene butadiene, polyethylene ea chlorosulfonated, polyethylene le polyethylene e hokahaneng.
7. Ho tenyetseha
Hobane rabara ea ethylene propylene ha e na lintho tse ka nkeloang sebaka ke polar sebopehong sa eona sa limolek'hule le matla a tlase a ho kopana ha limolek'hule, ketane ea eona ea limolek'hule e ka boloka ho tenyetseha ka mefuta e mengata, e latela rabara ea tlhaho le rabara ea cis polybutadiene, 'me e ntse e ka e boloka mochesong o tlase.
8. Ho khomarela
Ka lebaka la khaello ea lihlopha tse mafolofolo sebopehong sa limolek'hule tsa rabara ea ethylene propylene, matla a ho kopana a tlase, 'me rabara e bonolo ho e fafatsa, kahoo ho ikamahanya le ho khomarelana ha tsona ho fokola haholo.
Nako ea poso: Mphalane-10-2022