Ni ibihe biranga EPDM rubber?

1. Ubucucike buke kandi kuzuza byinshi
Rubber ya ethylene-propylene ni rubber ifite ubucucike buke, ifite ubucucike bwa 0.87. Byongeye kandi, ishobora kuzuzwamo amavuta menshi na EPDM.
Kongeramo ibikoresho byo gusoza bishobora kugabanya ikiguzi cy'ibicuruzwa bya rubber kandi bigatanga ikiguzi cyo hejuru cya rubber mbisi ya ethylene propylene. Ku rubber ya ethylene propylene ifite agaciro ka Mooney, ingufu zifatika n'izikoreshwa mu kuzuza byinshi ntizigabanuka cyane.

2. Ubudahangarwa ku gusaza
Rubber ya ethylene-propylene ifite ubushobozi bwo kurwanya ikirere neza, irwanya ozone, irwanya ubushyuhe, irwanya aside na alkali, irwanya umwuka w'amazi, irwanya ibara, imiterere y'amashanyarazi, imiterere yo kuzuza amavuta no kugenda kw'amazi mu bushyuhe bw'icyumba. Ibikoresho bya ethylene-propylene bishobora gukoreshwa igihe kirekire kuri 120°C, kandi bishobora gukoreshwa igihe gito cyangwa rimwe na rimwe kuri 150-200°C. Kongeramo antioxydants zikwiye bishobora kongera ubushyuhe bwayo. Rubber ya EPDM ifitanye isano na peroxide ishobora gukoreshwa mu bihe bikomeye. Rubber ya EPDM ishobora kugera ku masaha arenga 150 idacikagurika mu gihe cy'ubushyuhe bwa ozone bwa 50pphm na 30% byagutse.

3. Ubudahangarwa bw'inkongi
Kubera ko ethylene propylene rubber idafite polarity kandi ikaba idafite urwego rwo hasi rwo kudakora neza, ifite ubushobozi bwo guhangana neza n'ibintu bitandukanye bya polar chemicals nka alcool, aside, alkali, oxydants, refrigerants, detergents, amavuta y'amatungo n'ibimera, ketones n'amavuta. Ariko ifite ubushobozi buke mu bintu birimo ibinure n'impumuro nziza (nka lisansi, benzene, nibindi) na peteroli y'amabuye y'agaciro. Umusaruro uzagabanuka kandi bitewe n'imikorere y'igihe kirekire ya aside irimo ingano. Muri ISO/TO 7620, ubwoko hafi 400 bw'ibinyabutabire bya gaze na liquid byakusanyije amakuru ku miterere itandukanye ya rubber, kandi byagennye urwego rwa 1-4 kugira ngo bigaragaze urwego rwabyo, n'ingaruka z'ibinyabutabire bya gaze ku miterere ya rubber.

Ingano y'ingano Igipimo cyo kubyimba /% Agaciro ko kugabanya ubukana Ingaruka ku mikorere
1 <10 <10 gato cyangwa oya
2 10-20 <20 ntoya
3 30-60 <30 hagati
4 >60 >30 bikomeye

4. Kurwanya umwuka w'amazi
Rubber ya ethylene-propylene ifite ubushobozi bwo kurwanya umwuka w’amazi kandi bivugwa ko irwanya ubushyuhe bwayo kurusha ubushyuhe bwayo. Mu mwuka ushyushye cyane wa 230℃, isura ya EPDM ntiyahindutse nyuma y’amasaha agera ku 100. Ariko, muri ubwo buryo bumwe, rubber ya fluorine, rubber ya silicone, rubber ya fluorosilicone, rubber ya butyl, rubber ya nitrile, na rubber karemano byangiritse cyane nyuma y’igihe gito.

5. Kurwanya amazi ashyushye cyane
Rubber ya ethylene-propylene nayo ifite ubushobozi bwo guhangana n'amazi ashyushye cyane, ariko ifitanye isano rya bugufi n'uburyo bwose bwo gukurura. Rubber ya ethylene-propylene ifite dimorpholine disulfide na TMTD nk'uburyo bwo gukurura, nyuma yo kwinjizwa mu mazi ashyushye cyane kuri 125°C mu gihe cy'amezi 15, imiterere y'imashini ihinduka gato cyane, kandi igipimo cyo kwaguka k'ingano ni 0.3% gusa.

6. Imikorere y'amashanyarazi
Rubber ya ethylene-propylene ifite ubushobozi bwo gukingira amashanyarazi neza kandi irwanya corona, kandi imiterere yayo y'amashanyarazi ni myiza kurusha cyangwa hafi nk'iya styrene-butadiene rubber, chlorosulfonated polyethylene, polyethylene na cross-linked polyethylene.

7. Guhindura imiterere y'umubiri
Kubera ko nta bintu bisimbura polar mu miterere ya molekile ya ethylene-propylene rubber, ingufu zihuza za molekile ni nke, kandi uruhererekane rwa molekile rushobora kugumana ubworoherane mu buryo bwagutse, rukaba urwa kabiri nyuma ya rubber isanzwe ishobora kuganirwaho na butadiene, kandi rushobora gukomeza kubungabungwa ku bushyuhe buri hasi.

8. Gufata neza
Rubber ya ethylene-propylene idafite amatsinda akora bitewe n'imiterere yayo ya molekile kandi ifite ingufu nke. Byongeye kandi, rubber yoroshye gukura, kandi kwifata kwayo no gufatana kwayo ni bike cyane.