1. Whakapiri
He iti te kaha o te rapa ethylene-propylene na te kore o nga roopu hohe i roto i tona hanganga ngota.I tua atu, he ngawari te tipu o te rapa, a, he tino rawakore tona piri-whaiaro me te piri tahi.
Ethylene Propylene Rubber Nga momo rerekee
I te mea i pai te whakawhanaketanga o te rapa EPDM me te EPDM i te mutunga o te 1950s me te timatanga o te 1960s, he momo momo rapa ethylene propylene kua whakarereketia me te rapa ethylene propylene thermoplastic (pēnei i te EPDM/PE) kua puta ki te ao, na reira e whakarato ana i te whānuitanga o te whakamahinga o te rapa ethylene propylene. he maha nga momo me nga tohu.Ko te nuinga o te rapa ethylene-propylene kua whakarereketia he bromination, chlorination, sulfonation, maleic anhydride, maleic anhydride, silicone modification, me te nylon modification o te ethylene-propylene rapa.Kua honoa ano te rapa Ethylene-propylene i te acrylonitrile, te acrylate me etahi atu.I roto i nga tau, he maha nga rauemi polymer me nga taonga matawhānui pai kua whiwhihia ma te whakakotahi, te copolymerization, te whakakii, te hono, te whakakaha me te whakakotahitanga ngota.Ko te rapa ethylene-propylene kua tino pai ake i roto i te mahi na roto i te whakarereketanga, na reira ka whakawhānuihia te awhe tono o te rapa ethylene-propylene.
Ka tukatukahia te rapa ethylene propylene brominated e te kaihoko brominating i runga i te mira tuwhera.I muri i te bromination, ka taea e te rapa ethylene-propylene te whakapai ake i te tere o te vulcanization me te mahi adhesion, engari ka heke tona kaha miihini, no reira he pai noa te rapa ethylene-propylene brominated mo te paparanga takawaenga o te rapa ethylene-propylene me etahi atu rapa.
Ka mahia te rapa ethylene propylene ma te tuku hau maaota ma te otinga rapa EPDM.Ka taea e te chlorination o te rapa ethylene-propylene te whakanui ake i te tere vulcanization me te hototahi ki te whiriwhiringa kore hanga, te aukati mura, te aukati hinu, me te mahi adhesion ka pai ake hoki.
Ka mahia te rapa ethylene propylene sulfonated ma te whakakore i te rapa EPDM i roto i te whakarewa me te rongoa ki tetahi kaihoko whakangao ngarara me te kaihoko whakakore.Ka whakamahia nuitia te rapa ethylene propylene sulfonated i roto i te whakapiri, i nga papanga whakakikoruatia, i te hanga mīti hiroki parewai, me nga ararewa aukati i te waikura na runga i ona ahuatanga elastomer thermoplastic me te pai o nga taonga piri.
Ko te rapa ethylene-propylene kua honoa ki te Acrylonitrile e whakamahi ana i te toluene hei whakarewa me te waipiro benzyl perchlorinated hei kaikokiri ki te hono i te acrylonitrile ki te rapa ethylene-propylene i te 80°C.Ko te rapa ethylene-propylene kua whakarerekehia e te Acrylonitrile kaore i te pupuri noa i te parenga waikura o te rapa ethylene-propylene, engari ka whiwhi ano hoki i te parenga hinu e rite ana ki te nitrile-26, a he pai ake nga ahuatanga o te tinana me te miihini me nga taonga tukatuka.
Ko te rapa ethylene propylene Thermoplastic (EPDM/PP) kei runga i te rapa EPDM me te polypropylene mo te ranu.I te wa ano, he hua e taea ai e te rapa ethylene-propylene te taumata e tika ana mo te honohono.Ehara i te mea kei te pupuri noa i nga ahuatanga o te rapa ethylene-propylene i runga i te mahi, engari he mahi hangarau whakamiharo hoki o te werohanga, te tangohanga, te pupuhi pupuhi me te whakamaarama o te thermoplastics.
2. iti kiato me te tiketike whakakī rawa
Ko te kiato o te rapa ethylene propylene he rapa raro, a ko tona kiato he 0.87.I tua atu, ka taea te whakakii i te nui o te hinu me te taapiri i nga whakakii, na reira ka taea te whakaheke i te utu o nga hua rapa, me te kino o te utu nui o te ethylene-propylene rubber raw rubber ka taea te hanga mo.Mo te rapa ethylene-propylene me te uara Mooney teitei, ka taea te whakaheke i te kaha tinana me te miihini i muri i te whakakii nui.ehara i te nui.
3. Te aukati waikura
Na te kore o te polarity me te iti o te koretake o te rapa ethylene-propylene, he pai te aukati ki nga momo matū polar penei i te waipiro, te waikawa, te kawakore, te waikura, te whakamahana, te horoi, te hinu kararehe me te huawhenua, te ketone me te ngako, etc. ;Engari i roto i te wairewa aliphatic me te kakara (pērā i te penehīni, benzene, me ētahi atu) me te pūmautanga rawakore o te hinu kohuke.Ka heke ano te mahinga i raro i te mahi mo te wa roa o te waikawa kukū.I roto i te ISO/TO 7620, tata ki te 400 nga momo matū hau me te wai e kohia ana i runga i nga ahuatanga o nga momo rapa, ka tohua nga tohu 1-4 hei tohu i te tohu o te mahi, me te paanga o nga matū pirau ki nga taonga rapa:
Koeke Rōrahi Reiti tetere/% Uara whakaheke pakeke Te painga ki te mahi
1 <10 <10 paku, kore ranei
2 10-20 <20 iti ake
3 30-60 <30 Tikanga
4>60>30 taumaha
4. Te aukati wai kohu
He pai rawa atu te parenga kohu wai a te rapa ethylene-propylene, e kiia ana he pai ake i tana parenga wera.I roto i te mamaoa tino wera i te 230°C, karekau he huringa o te ahua i muri tata ki te 100 haora.I raro i nga tikanga ano, ko te fluororubber, te rapa silicone, te rapa fluorosilicone, te rapa butyl, te rapa nitrile, me te rapa taiao ka kite i te kino o te ahua i muri i te wa poto.
5. Te ātete ki te wai wera rawa
He pai ake hoki te rapa a Ethylene-propylene ki te wai wera rawa, engari he hononga tata ki nga punaha whakangao katoa.Ko te rapa ethylene-propylene me te dimorpholine disulfide me te TMTD i te mea ko te punaha vulcanization he iti noa te whakarereketanga o nga taonga miihini i muri i te whakamakuku i roto i te wai wera i te 125 ° C mo nga marama 15, a ko te tere o te roha o te rōrahi he 0.3% anake.
6. Nga taonga hiko
He pai rawa atu nga ahuatanga o te rapa ethylene-propylene ki te whakamatao hiko me te parenga corona, a, he pai ake, he tata ranei ona taonga hiko ki era o te rapa styrene-butadiene, polyethylene chlorosulfonated, polyethylene me te polyethylene hono-whakawhiti.
7. Elasticity
Na te mea karekau he whakakapinga polar i roto i te anga ngota o te rapa ethylene-propylene, he iti te kaha o te whakakotahitanga o te ngota, a ka taea e te mekameka ngota te pupuri ngawari i roto i te whānuitanga whanui, tuarua ki te rapa maori me te rapa butadiene, ka taea tonu te pupuri. i te pāmahana iti.
8. Atete pakeke
Ko te rapa Ethylene-propylene he pai te parenga huarere, te ozone resistance, te wera wera, te waikawa me te kawakore, te parenga kohu wai, te pumau o te tae, nga taonga hiko, te whakakii hinu me te rere o te pāmahana rūma.Ka taea te whakamahi i nga hua rapa ethylene-propylene mo te wa roa i te 120°C, ka taea te whakamahi mo te wa poto, mo te wa poto ranei i te 150-200°C.Ko te taapiri i te kaihoko anti-pakeke pai ka piki ake te mahana o te ratonga.Ka taea te whakamahi i te ngongo rapa EPDM (EPDM hose) e hono ana ki te peroxide i raro i nga tikanga kino.I raro i nga tikanga o te kukū ozone o 50pphm me te totoro o 30%, EPDM rapa taea tae neke atu i te 150h kahore kapiti.
Te wa tuku: Maehe-31-2023