EPDM hamwe nigice kinini cya monomer ya gatatu ifite elastique nziza na compression yo hasi; icyakora, kubera urwego rwo hejuru rwo guhuza, imbaraga zingana no kurambura kuruhuka biri hasi, kandi kurwanya gusaza nabyo ni bibi. Mubyongeyeho, kurwanya gusaza kwa EPDM hamwe na ENB nka monomer ya gatatu biruta ibya EPDM hamwe na HD.
Sisitemu yo gukiza
Mubisanzwe, reberi ya EPDM irashobora guterwa nubwoko bubiri bwa sisitemu yibirunga: peroxide na sulfure yumuhondo wa sulfuru. Imiterere ihuza imiyoboro ya peroxide volcanisation ya sisitemu ni CC ya CC, mugihe imiterere ihuza imiyoboro ya sisitemu ya volfunike ya sulfure ni CS ya CS. Inkunga ya CC irahagaze neza cyane kurenza CS ya CS, bityo rebero ya EPDM irwanya ubushyuhe bwinshi iraterwa na peroxide. Peroxide ikoreshwa cyane ni DCP. Hamwe no kwiyongera kwa dosiye ya DCP, reberi yibirunga ihindurwa buhoro buhoro kuva muntangiriro ya sulfurizasi, imbaraga nke hamwe no guhindura ibintu byinshi kugirango imbaraga ziyongere no kugabanuka kwa deformasiyo; noneho urwego rwo kurunga rwarushijeho kwiyongera, imbaraga zitangira kugabanuka, kandi deformasiyo igera byibuze; amaherezo, nyuma yikirenga cyibintu byangiza, igice cyurunigi rwa molekile gitangira guca urunigi rwangirika, imbaraga zikomeza kugabanuka, kandi ihinduka ryiyongera buhoro buhoro.
Mugihe urwego rwa karubone rwirabura rwiyongera, compression yo kugabanuka iragabanuka, elastique iriyongera, nimbaraga zigabanuka. Imbaraga za karubone ya N990 ni nkeya cyane kandi biragoye kugenzura mubikorwa, ntabwo rero ikoreshwa. Muguhitamo N762 karubone umukara, compression yo gushiraho agaciro irashobora kuboneka. Kugirango woroshye gukwirakwiza umukara wa karubone no kubona imikorere myiza yo gutunganya, hitamo amavuta make ya plasitike ya paraffin, ihuza cyane na reberi ya etylene propylene.
4. Umukozi uhuza
Nta sano ihagije ku ruhererekane nyamukuru rwa EPDM, nubwo ikirunga cya peroxide gishobora gukoreshwa, ariko umuvuduko w’ibirunga uratinda, guhuza ibikorwa ni bike. Kugirango uhagarike kandi wihutishe inzira yibirunga, birakenewe gukoresha agent ihuza. TAC / GR ivuwe nibyiza kubitatanya no gupima.
Hamwe no kwiyongera kwinshi kwa TAC / GR, imbaraga zingana, kurambura kuruhuka no guhagarika ihindagurika rihoraho rya reberi y’ibirunga byagabanutse, kandi agaciro ka MH k’ingutu zihoraho ziyongera. Birashobora kugaragara ko ubucucike bwa reberi y’ibirunga bwatejwe imbere, imiterere yubukanishi bwaragabanutse, ariko ubworoherane bwabaye bunini. Muri icyo gihe, agaciro ka ML kagabanutse, byerekana ko ubukonje bwa Mooney bwagabanutse, amazi ya reberi yariyongereye, kandi byari byoroshye gutunganywa; ts1 muri rusange ntiyahindutse, kandi agaciro ka t 90 kagabanutse, kandi umuvuduko wibirunga wagaragaye neza. Imikorere yo gusaza yari mibi kuri 1.5phr ya TAC / GR. Ibi birashobora guterwa no kuba hari imfashanyo ihuza, gukora gahunda ya voloxisation ya peroxide, kugabanya igihe cy’ibirunga, kugabanya amahirwe yo kuvunika urunigi rwa molekile no kutagabanuka ku bushyuhe bwinshi. Iyo umubare ari mwinshi, byongera gusaza kwambukiranya reberi kandi bigabanya ubushyuhe bwa EPDM. Nyuma yo kugereranya, compression ihoraho ihindagurika nibyiza kuri 2phr, kandi kurwanya ubushyuhe ntibitangwa cyane, nuko TAC / GR ikoreshwa kuri 2phr.
