Kedu ihe bụ njirimara nke roba EPDM?

1. Njupụta dị ala na njupụta dị elu
Ethylene-propylene roba bụ roba nwere obere njupụta, nke nwere njupụta nke 0.87. Na mgbakwunye, enwere ike ijupụta ya na nnukwu mmanụ na EPDM.
Ịtinye ihe e ji emeju ihe nwere ike ibelata ọnụ ahịa ngwaahịa rọba ma mejupụta ọnụ ahịa dị elu nke roba ethylene propylene raw. Maka roba ethylene propylene nwere uru Mooney dị elu, ike anụ ahụ na nke mekaniki nke ihe e ji emeju ihe dị elu anaghị ebelata nke ukwuu.

2. Mgbochi ịka nká
Roba Ethylene-propylene nwere ezigbo iguzogide ihu igwe, iguzogide ozone, iguzogide okpomọkụ, iguzogide acid na alkali, iguzogide uzuoku mmiri, nkwụsi ike agba, ihe ndị metụtara eletriki, ihe ndị na-eme ka mmanụ jupụta na mmiri mmiri na okpomọkụ ụlọ. Enwere ike iji ngwaahịa roba Ethylene-propylene ruo ogologo oge na 120°C, a pụkwara iji ya mee ihe nwa oge ma ọ bụ mgbe ụfọdụ na 150-200°C. Ịtinye ihe ndị na-egbochi antioxidant kwesịrị ekwesị nwere ike ime ka okpomọkụ ojiji ya dịkwuo elu. Enwere ike iji roba EPDM cross-linked na peroxide n'ọnọdụ siri ike. Roba EPDM nwere ike iru ihe karịrị awa 150 na-enweghị mgbawa n'okpuru ọnọdụ nke mkpokọta ozone 50ppm na ịgbatị 30%.

3. Mgbochi ire ere
Ebe ọ bụ na roba ethylene propylene enweghị polarity na obere oke nke enweghị afọ ojuju, ọ na-eguzogide ọgwụ dị iche iche dịka alcohols, acids, alkalis, oxidants, refrigerants, saplings, anụmanụ na mmanụ akwụkwọ nri, ketones na mmanụ. Mana ọ naghị akwụsi ike na ihe mgbaze abụba na aromatic (dịka petrol, benzene, wdg) na mmanụ mineral. Arụmọrụ ya ga-ebelatakwa n'okpuru ọrụ ogologo oge nke acid concentrated. Na ISO/TO 7620, ihe fọrọ nke nta ka ọ bụrụ ụdị kemịkalụ gas na mmiri mmiri 400 anakọtala ozi gbasara ihe onwunwe rọba dị iche iche, ma kọwaa ọkwa 1-4 iji gosi ogo ọrụ ha, na mmetụta nke kemịkalụ corrosion na ihe onwunwe rọba.

Oke Ọkwa Ọzịza/% Uru Mbelata Ike Mmetụta na arụmọrụ
1 <10 <10 obere ma ọ bụ mba
2 10-20 <20 pere mpe
3 30-60 <30 ọkara
4 >60 >30 siri ike

4. Mgbochi uzuoku mmiri
Roba Ethylene-propylene nwere ezigbo iguzogide uzuoku mmiri ma a na-eme atụmatụ na ọ ka mma karịa iguzogide okpomọkụ ya. Na uzuoku 230℃ nke a na-ekpo oke ọkụ, ọdịdị nke EPDM agbanweghị mgbe ihe fọrọ nke nta ka ọ bụrụ awa 100 gasịrị. Agbanyeghị, n'otu ọnọdụ ahụ, roba fluorine, roba silicone, roba fluorosilicone, roba butyl, roba nitrile, na roba eke nwetara nnukwu mmebi n'ọdịdị mgbe obere oge gasịrị.

5. Mmiri na-eguzogide oke ọkụ
Roba Ethylene-propylene nwekwara ike iguzogide mmiri ọkụ karịa, mana ọ nwere njikọ chiri anya na sistemụ vulcanization niile. Roba Ethylene-propylene nwere dimorpholine disulfide na TMTD dị ka sistemụ vulcanization, mgbe e mikpuru ya na mmiri ọkụ dị oke elu na 125°C ruo ọnwa 15, njirimara igwe na-agbanwe obere, ọnụego mgbasawanye olu dịkwa naanị 0.3%.

6. Arụmọrụ eletriki
Rọba Ethylene-propylene nwere ezigbo ihe mkpuchi eletriki na iguzogide corona, ihe onwunwe eletriki ya dịkwa mma karịa ma ọ bụ dị nso na nke rọba styrene-butadiene, polyethylene chlorosulfonated, polyethylene na polyethylene cross-linked.

7. Mgbanwe
Ebe ọ bụ na enweghị ihe ndị na-anọchi anya polar n'ime nhazi molekul nke roba ethylene-propylene, ike njikọta nke molekul ahụ dị ala, agbụ molekul ahụ nwekwara ike ịnọgide na-enwe mgbanwe n'ọtụtụ ebe, nke na-esote naanị roba ebumpụta ụwa na nke butadiene, a ka nwekwara ike ịnọgide na-enwe ya n'okpomọkụ dị ala.

8. Nrapado
Ruba Ethylene-propylene enweghị otu ndị na-arụ ọrụ n'ihi nhazi molekul ya ma nwee obere ike njikọta. Na mgbakwunye, rọba ahụ dị mfe ito, ọ naghịkwa ejide onwe ya ma ọ na-ejikọ ibe ya nke ọma.