U tseba eng ka EPDM?

Selelekela sa EPDM

EPDM ke terpolymer ea ethylene, propylene le dienes tse se nang conjugated, tse qalileng tlhahiso ea khoebo ka 1963. Tšebeliso ea selemo le selemo ea lefats'e ke lithane tsa 800000. Tšobotsi e ka sehloohong ea EPDM ke khanyetso ea eona e phahameng ea oxidation, ho hanyetsa ozone le ho hanyetsa kutu. Kaha EPDM ke ea lelapa la polyolefin (PO), e na le thepa e ntle ea vulcanization. Har'a li-rubber tsohle, EPDM e na le matla a khoheli a tlaase ka ho fetisisa 'me e ka monya li-fillers le oli e ngata ntle le ho ama thepa. Ka hona, e ka hlahisa metsoako ea rabara e theko e tlaase.

Tshebetso

• Boima bo tlaase le ho tlatsa holimo

Ethylene-propylene rabara e na le sekhahla se tlase sa 0.87. Ho phaella moo, oli e ngata e ka tlatsoa 'me ho ka eketsoa moemeli oa ho tlatsa, o ka fokotsang litšenyehelo tsalihlahisoa tsa rabara, etsa hore ho be le mefokolo ea theko e phahameng ea rabara e tala ea EPDM, le bakeng sa EPDM e nang le boleng bo phahameng ba Mooney, matla a 'mele le a mechine ka mor'a ho tlatsa holimo ha a fokotsehe haholo.

• 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, ho tlatsa oli le mocheso o tloaelehileng oa mocheso.Lihlahisoa tsa rabara tsa ethylene-propylene e ka sebelisoa nako e telele ho 120 ℃, 'me e ka sebelisoa nakoana kapa ka linako tse ling ho 150 - 200 ℃. Mocheso oa tšebeliso o ka eketsoa ka ho eketsa antioxidant e nepahetseng. EPDM crosslinked le peroxide e ka sebelisoa tlas'a maemo a thata. Tlas'a boemo ba mahloriso a ozone a 50 phm le ho otlolla 30%, EPDM e ke ke ea senya nako e fetang 150 h.

• Khanyetso ea kutu

Ka lebaka la khaello ea polarity le tlaase unsaturation ea rabara ethylene-propylene, e na le ho hanyetsa hantle ho lik'hemik'hale tse fapa-fapaneng tsa polar tse kang joala, acid, alkali, oxidant, refrigerant, detergent, liphoofolo le oli ea meroho, ketone le mafura; Leha ho le joalo, e na le botsitso bo fokolang ho li-solvents tsa aliphatic le tse nkhang hamonate (tse kang peterole, benzene, joalo-joalo) le oli ea liminerale. Tlas'a ketso ea nako e telele ea acid e concentrated, ts'ebetso e tla boela e fokotsehe.

• Ho hanyetsa mouoane oa metsi

EPDM e na le khanyetso e ntle ea mouoane oa metsi 'me ho hakanngoa hore e phahametse mocheso oa eona. Ka mouoane o chesang haholo oa 230 ℃, ha ho na phetoho ponahalong ka mor'a lihora tse ka bang 100. Leha ho le joalo, tlas'a maemo a tšoanang, rabara ea fluorine, rabara ea silicon, rabara ea fluorosilicone, rabara ea butyl, rabara ea nitrile le rabara ea tlhaho li bile le ho senyeha ho totobetseng ha ponahalo ka nako e khutšoanyane.

• Ho hanyetsa metsi a chesang

Ethylene-propylene rabara e boetse e na le khanyetso e ntle ea metsi a chesang haholo, empa e amana haufi-ufi le mekhoa eohle ea phekolo. Thepa ea mochini ea rabara ea ethylene-propylene e nang le morpholine disulfide le TMTD joalo ka mokhoa oa ho folisa o ile oa fetoha hanyane kamora ho kenella ka metsing a futhumetseng a 125 ℃ ka likhoeli tse 15, mme sekhahla sa katoloso ea molumo e ne e le 0.3 feela%.

• Ts'ebetso ea motlakase

Ethylene-propylene rabara e na le motlakase o motle haholo oa 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.

• Matla a ho hlasimolla

Hobane ha ho na sebaka sa polar mohahong oa limolek'hule oa rabara ea ethylene-propylene le matla a ho kopanya limolek'hule a tlaase, 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 cis-polybutadiene, 'me e ntse e ka boloka ho mocheso o tlase.

• Ho khomarela

Ka lebaka la ho haella ha lihlopha tse sebetsang ka har'a sebopeho sa limolek'hule tsarabara ea ethylene-propylene, matla a ho kopanya a fokolang, le ho fafatsa serame habonolo ea motsoako oa rabara, ho ikamahanya le ho khomarela ho fokola haholo.

Molemo

• E na le tekanyo e phahameng ea tshebetso-theko. Boima ba rabara e tala ke 0.86 ~ 0.90g / cm3 feela, e leng rabara e tloaelehileng ka ho fetisisa e nang le boima bo bobebe ba rabara e tala; E ka boela ea tlatsoa ka bongata ho fokotsa litšenyehelo tsa motsoako oa rabara.
• Ho hanyetsa botsofali ho babatsehang, ho hanyetsa boemo ba leholimo, ho hanyetsa ozone, ho hanyetsa mahlaseli a letsatsi, ho hanyetsa mocheso, ho hanyetsa metsi, ho hanyetsa mouoane oa metsi, ho hanyetsa UV, ho hanyetsa mahlaseli le lintho tse ling tsa botsofali. Ha e sebelisoa le rabara e meng e sa tsitsang ea diene e kang NR, SBR, BR, NBR, le CR, EPDM e ka bapala karolo ea polymer antioxidant kapa antioxidant.
• Ho hanyetsa lik'hemik'hale tse ntle haholo, asiti, alkali, sesepa, oli ea liphoofolo le meroho, joala, ketone, joalo-joalo; Ho hanyetsa ho hotle ha metsi, metsi a futhumetseng le mouoane; Ho hanyetsa oli ea polar.
• Ts'ebetso e ntle ea ho kenya letsoho, ho hanyetsa molumo 1016Q · cm, motlakase oa ho senya 30-40MV / m, dielectric constant (1kHz, 20 ℃) ​​2.27.
• E sebetsa ho mefuta e mengata ea mocheso, e nang le mocheso o fokolang oa ho sebetsa oa - 40 ~ - 60 ℃, 'me e ka sebelisoa ho 130 ℃ nako e telele.