Ni ibihe bintu biranga reberi ya EPDM?

1. Ubucucike buke no kuzura cyane
Ibikoresho bya Ethylene-propylene ni reberi ifite ubucucike buke, n'ubucucike bwa 0.87.Mubyongeyeho, irashobora kuzuzwa amavuta menshi na EPDM.
Ongeraho ibyuzuzo birashobora kugabanya igiciro cyibicuruzwa bya reberi kandi bigatanga igiciro cyinshi cya Ethylene propylene reberi mbisi.Kuri reberi ya Ethylene propylene ifite agaciro gakomeye ka Mooney, imbaraga zumubiri nubukanishi byuzuye byuzuye ntabwo bigabanuka cyane.

2. Kurwanya gusaza
Rubber ya Ethylene-propylene ifite imbaraga zo guhangana nikirere cyiza, kurwanya ozone, kurwanya ubushyuhe, aside na alkali, kurwanya imyuka y’amazi, guhagarara kwamabara, ibintu byamashanyarazi, ibintu byuzuza amavuta hamwe nubushuhe mubushyuhe bwicyumba.Ibikoresho bya reberi ya Ethylene-propylene birashobora gukoreshwa igihe kirekire kuri 120 ° C, kandi birashobora gukoreshwa mugihe gito cyangwa rimwe na rimwe kuri 150-200 ° C.Ongeramo antioxydants ibereye irashobora kongera ubushyuhe bwayo.EPDM reberi ihujwe na peroxide irashobora gukoreshwa mubihe bibi.Rubber ya EPDM irashobora kugera kuri 150h itarinze guturika mubihe bya ozone yibanze 50pphm na 30%.

3. Kurwanya ruswa
Kubera ko reberi ya Ethylene propylene idafite polarite hamwe nubushyuhe buke bwo guhaga, ifite imbaraga zo kurwanya imiti itandukanye ya polar nka alcool, acide, alkalis, okiside, firigo, ibikoresho byogajuru, amavuta yinyamanswa n’ibimera, ketone hamwe n amavuta.Ariko ifite umutekano muke mumashanyarazi n'ibinure (nka lisansi, benzene, nibindi) namavuta yubutare.Imikorere nayo izagabanuka mubikorwa byigihe kirekire bya acide yibanze.Muri ISO / TO 7620, amoko agera kuri 400 yimiti yangiza ya gaze na mazi yakusanyije amakuru kumitungo itandukanye ya reberi, anagaragaza urwego 1-4 kugirango yerekane urwego rwibikorwa, n'ingaruka z'imiti yangirika kumiterere ya reberi.

Icyiciro Cyumubyimba Igipimo /% Kugabanya ubukana agaciro Ingaruka kumikorere
1 <10 <10 gake cyangwa oya
2 10-20 <20 ntoya
3 30-60 <30 hagati
4> 60> 30 birakabije

4. Kurwanya imyuka y'amazi
Rubber ya Ethylene-propylene ifite imbaraga zo guhangana n’umwuka w’amazi kandi byagereranijwe ko iruta ubushyuhe bwayo.Muri 230 steam icyuka gishyushye, isura ya EPDM ntiyigeze ihinduka nyuma ya 100h.Nyamara, mubihe bimwe, reberi ya fluor, reberi ya silicone, rebero ya fluorosilicone, butyl rubber, nitrile reberi, na reberi karemano byangiritse cyane mumiterere nyuma yigihe gito.

5. Kurwanya amazi ashyushye
Rubber ya Ethylene-propylene nayo ifite imbaraga zo kurwanya amazi ashyushye, ariko ifitanye isano rya hafi na sisitemu zose z’ibirunga.Rubber ya Ethylene-propylene hamwe na dimorpholine disulfide na TMTD nka sisitemu y’ibirunga, nyuma yo kwibizwa mu mazi ashyushye kuri 125 ° C mu gihe cy’amezi 15, imiterere y’ubukanishi ihinduka bike cyane, kandi igipimo cyo kwaguka ni 0.3% gusa.

6. Imikorere y'amashanyarazi
Rubber ya Ethylene-propylene ifite ibikoresho byiza byo gukwirakwiza amashanyarazi no kurwanya corona, kandi ibikoresho byayo byamashanyarazi biruta cyangwa hafi ya reberi ya styrene-butadiene, chlorosulfonated polyethylene, polyethylene na polyethylene.

7. Guhinduka
Kuberako nta bisimbuza polar biri mumiterere ya molekile ya reberi ya Ethylene-propylene, ingufu zifatanije na molekile ni nkeya, kandi urunigi rwa molekile rushobora gukomeza guhinduka muburyo bugari, icya kabiri nyuma ya reberi karemano na butadiene, kandi irashobora kuba bikomeza ku bushyuhe buke.

8. Gufatanya
Rubber ya Ethylene-propylene ibura amatsinda akora kubera imiterere ya molekile kandi ifite ingufu zifatika.Byongeye kandi, reberi iroroshye kumera, kandi kwizirika hamwe no gufatana ni bibi cyane.