Niki uzi kuri EPDM?

Intangiriro kuri EPDM

EPDM ni terpolymer ya Ethylene, propylene na diène idafite conjugée, yatangiye gukora ubucuruzi mu 1963. Imikoreshereze y’isi ku isi ni toni 800000. Ikintu nyamukuru kiranga EPDM ni ukurwanya okiside isumba iyindi, kurwanya ozone no kurwanya ruswa. Nkuko EPDM ari iyumuryango wa polyolefin (PO), ifite imiterere myiza yibirunga. Muri reberi zose, EPDM ifite uburemere buke bwihariye kandi irashobora gukuramo ibintu byinshi byuzuza amavuta bitagize ingaruka kumiterere. Kubwibyo, irashobora gutanga umusaruro uhendutse wa reberi.

Imikorere

• Ubucucike buke no kuzura cyane

Rubber ya Ethylene-propylene ifite ubucucike buke bwa 0.87. Mubyongeyeho, umubare munini wamavuta arashobora kuzuzwa no kuzuza ibintu bishobora kongerwamo, bishobora kugabanya ikiguzi cyarubber.

• Kurwanya gusaza

Rubber ya Ethylene-propylene ifite imbaraga zo guhangana nikirere cyiza, kurwanya ozone, kurwanya ubushyuhe, aside na alkali, kurwanya imyuka y’amazi, guhagarara neza kwamabara, ibintu byamashanyarazi, kuzuza amavuta hamwe nubushuhe busanzwe.Ibikoresho bya reberi ya Ethylene-propylene irashobora gukoreshwa umwanya muremure kuri 120 ℃, kandi irashobora gukoreshwa mugihe gito cyangwa mugihe kimwe kuri 150 - 200 ℃. Gukoresha ubushyuhe burashobora kwiyongera wongeyeho antioxydants ikwiye. EPDM ihujwe na peroxide irashobora gukoreshwa mubihe bibi.Mu bihe bya ozone ya 50 pphm hamwe na 30%, EPDM ntishobora gucika hejuru ya 150 h.

• Kurwanya ruswa

Bitewe no kubura polarite no kudahaza kwa reberi ya Ethylene-propylene, ifite imbaraga zo kurwanya imiti itandukanye ya polar nka alcool, aside, alkali, okiside, firigo, ibikoresho byangiza, amavuta y’inyamanswa n’ibimera, ketone n’amavuta; Nyamara, ifite umutekano muke mumashanyarazi ya alifatique na aromatique (nka lisansi, benzene, nibindi) hamwe namavuta yubutare. Mubikorwa byigihe kirekire bya acide yibanze, imikorere nayo izagabanuka.

• Kurwanya imyuka y'amazi

EPDM ifite imbaraga zo guhangana n’umwuka w’amazi kandi bivugwa ko iruta ubushyuhe bwayo. Muri 230 steam ubushyuhe bukabije, nta gihinduka mumiterere nyuma ya 100 h. Nyamara, mubihe bimwe, reberi ya fluor, reberi ya silicon, reberi ya fluorosilicone, butyl rubber, nitrile reberi na reberi karemano byagaragaye ko byangiritse bigaragara mumiterere mugihe gito.

• Kurwanya amazi ashyushye

Rubber ya Ethylene-propylene nayo ifite imbaraga zo kurwanya amazi ashyushye, ariko ifitanye isano rya hafi na sisitemu zose zikiza. Ibikoresho bya mashini ya etylene-propylene reberi hamwe na morpholine disulfide na TMTD nkuko sisitemu yo gukiza yahindutse gake nyuma yo gushiramo amazi 125 yamazi ashyushye mumezi 15, kandi igipimo cyo kwaguka cyari 0.3% gusa.

• Imikorere y'amashanyarazi

Rubber ya Ethylene-propylene ifite amashanyarazi meza kandi irwanya corona, kandi ibikoresho byayo byamashanyarazi birarenze cyangwa hafi ya reberi ya styrene-butadiene, chlorosulfonated polyethylene, polyethylene na polyethylene.

• Elastique

Kubera ko nta kintu gisimbuza polar mu miterere ya molekuline ya etilene-propylene reberi kandi ingufu za molekile cohesion ni nkeya, urunigi rwa molekile rushobora gukomeza guhinduka mu buryo bwagutse, rukurikira nyuma ya reberi karemano na cis-polybutadiene, kandi irashobora gukomeza kuri ubushyuhe buke.

• Kwizirika

Bitewe no kubura amatsinda akora muburyo bwa molekile yareberi ya etylene-propylene, imbaraga nkeya zo guhuzagurika, hamwe no gukonjesha ubukonje bworoshye bwa reberi, kwifata no gufatana ni bibi cyane.

Ibyiza

• Ifite imikorere ihanitse-igiciro. Ubucucike bwa reberi mbisi ni 0.86 ~ 0,90g / cm3 gusa, aribwo busanzwe busanzwe hamwe n'ubucucike bworoshye bwa reberi mbisi; Irashobora kandi kuzuzwa kubwinshi kugirango igabanye igiciro cya reberi.
• Kurwanya gusaza bihebuje, kurwanya ikirere, kurwanya ozone, kurwanya izuba, kurwanya ubushyuhe, kurwanya amazi, kurwanya imyuka y'amazi, kurwanya UV, kurwanya imirasire nibindi bintu bishaje. Iyo ikoreshejwe nibindi bikoresho bya diene bidahagije nka NR, SBR, BR, NBR, na CR, EPDM irashobora kugira uruhare rwa polymer antioxydeant cyangwa antioxydeant.
• Kurwanya imiti myiza, aside, alkali, detergent, amavuta yinyamanswa nimboga, inzoga, ketone, nibindi; Kurwanya amazi meza, amazi ashyushye hamwe na parike; Kurwanya amavuta ya polar.
• Imikorere ihebuje cyane, irwanya amajwi 1016Q · cm, imbaraga zo kumeneka 30-40MV / m, guhora dielectric (1kHz, 20 ℃) ​​2.27.
• Irakoreshwa muburyo butandukanye bwubushyuhe, hamwe nubushyuhe buke bwo gukora bwa - 40 ~ - 60 ℃, kandi burashobora gukoreshwa kuri 130 ℃ mugihe kirekire.