1. Nrapado
Ethylene-propylene roba nwere obere ike na-ejikọta ọnụ n'ihi enweghị otu ndị na-arụ ọrụ na nhazi nke molecular ya.Tụkwasị na nke ahụ, rọba dị mfe na-eto eto, na njide onwe ya na nkwekọ ọnụ dị nnọọ njọ.
Ethylene Propylene Rubber gbanwetụrụ ụdị dị iche iche
Ebe ọ bụ na e mepụtara roba EPDM na EPDM nke ọma na njedebe 1950s na mmalite 1960, ọtụtụ ethylene propylene rubber na thermoplastic ethylene propylene roba (dị ka EPDM/PE) apụtawo n'ụwa, si otú a na-enye ngwa ngwa nke ethylene propylene roba. na-enye ọtụtụ ụdị na akara ule.Ethylene-propylene roba emeziri nke ọma gụnyere bromination, chlorination, sulfonation, anhydride maleic, anhydride maleic, mgbanwe silicone, na ngbanwe nylon nke roba ethylene-propylene.Ethylene-propylene roba nwekwara anyadokwa acrylonitrile, acrylate na na.N'ime afọ ndị gafeworonụ, a na-enweta ọtụtụ ihe polymer nwere ezigbo ihe mejupụtara ya site na ngwakọta, copolymerization, ndochi, grafting, nkwado na ngwakọta molekụla.Ethylene-propylene roba emewokwa ka ọ dịkwuo mma na arụmọrụ site na mgbanwe, si otú ahụ gbasaa ngwa ngwa nke ethylene-propylene roba.
A na-edozi rọba ethylene propylene nke e mebiri emebi site na onye na-ahụ maka brominating na igwe igwe mepere emepe.Mgbe bromination gasịrị, ethylene-propylene roba nwere ike imeziwanye ngwa ngwa ngwa ngwa na arụ ọrụ adhesion, mana ike ọrụ ya na-ebelata, ya mere brominated ethylene-propylene roba dabara adabara oyi akwa nke ethylene-propylene roba na rubbers ndị ọzọ.
A na-eme roba ethylene propylene chlorinated site n'ịfefe gas chlorine site na ngwọta rọba EPDM.Chlorination nke ethylene-propylene roba nwere ike iwelie ọsọ vulcanization na ndakọrịta na unsaturated negotiable, ire ọkụ na-eguzogide, mmanụ iguzogide, na adhesion arụmọrụ na-emeziwanye.
A na-eme rọba sulfonated ethylene propylene site na igbari rọba EPDM n'ime ihe mgbaze wee gwọọ ya na ihe na-eme ihe na-ekpo ọkụ na onye na-egbochi ya.A ga-eji rọba sulfonated ethylene propylene mee ihe n'ọtụtụ ebe na nrapado, akwa mkpuchi, na-ewu anụ na-adịghị ahụkebe nke mmiri na-adịghị na ya, na ihe mgbochi corrosion n'ihi njirimara elastomer thermoplastic na ezigbo nrapado.
Acrylonitrile-grafted ethylene-propylene roba na-eji toluene dị ka ihe mgbaze na perchlorinated benzyl mmanya dị ka onye mmalite iji nyado acrylonitrile na ethylene-propylene roba na 80ºC.Acrylonitrile-modified ethylene-propylene roba ọ bụghị naanị na-ejigide nguzogide corrosion nke ethylene-propylene roba, ma na-enwetakwa nguzogide mmanụ nke kwekọrọ na nitrile-26, ma nwee ihe ndị dị mma nke anụ ahụ na ígwè ọrụ na nhazi nhazi.
Thermoplastic ethylene propylene roba (EPDM/PP) dabeere na EPDM roba na polypropylene maka ịgwakọta.N'otu oge ahụ, ọ bụ ngwaahịa na-eme ka ethylene-propylene roba rute ogo a na-atụ anya ya nke crosslinking.Ọ bụghị nanị na ọ na-ejigide àgwà ethylene-propylene rọba n'ihe banyere ịrụ ọrụ, kamakwa ọ na-arụ ọrụ nkà na ụzụ dị ịrịba ama nke injection, extrusion, ịkpụzi na calendering nke thermoplastics.
2. Njupụta dị ala na ihe njuputa dị elu
Njupụta nke ethylene propylene roba bụ obere rọba, na njupụta ya bụ 0.87.Tụkwasị na nke ahụ, a na-ejupụta nnukwu mmanụ ma tinye ihe ndị na-emepụta ihe, n'ihi ya, ọnụ ahịa ngwaahịa rọba nwere ike ibelata, na mwepu nke ọnụ ahịa dị elu nke ethylene-propylene roba raw rubber nwere ike ime.Maka roba ethylene-propylene nwere uru Mooney dị elu, ike anụ ahụ na nke igwe nwere ike belata mgbe emejuchara elu.obughi ibu.
3. Nguzogide corrosion
N'ihi enweghị polarity na obere ogo unsaturation nke ethylene-propylene roba, ọ nwere ezigbo nguzogide dị iche iche pola chemicals dị ka alcohols, acids, alkalis, oxidants, refrigerants, detergents, anụmanụ na akwukwo nri mmanụ, ketones na abụba, wdg. ;Ma na aliphatic na aromatic solvents (dị ka mmanụ ụgbọala, benzene, wdg) na ogbenye kwụsie ike na ịnweta mmanụ.Arụmọrụ a ga-adakwa n'okpuru omume ogologo oge nke acid gbadoro ụkwụ.Na TS ISO / TO 7620, a na-anakọta ihe fọrọ nke nta ka ọ bụrụ ụdị 400 nke kemịkalụ na-emebi emebi na kemịkalụ mmiri dị iche iche na akụrụngwa nke rubbers dị iche iche, yana akara 1-4 akọwapụtara iji gosipụta ogo ọrụ yana mmetụta nke kemịkalụ corrosive na akụrụngwa roba:
Ọkwa ogo Ọzịza Ọzịza/% uru mbelata ike ọgwụgwụ mmetụta na arụmọrụ
1 <10 <10 obere ma ọ bụ enweghị
2 10-20 <20 pere mpe
3 30-60 <30 Na-agafeghị oke
4>60>30 siri ike
4. Mmiri na-eguzogide mmiri
Ethylene-propylene roba nwere ezigbo uzuoku mmiri na-eguzogide ma na-eche na ọ dị mma karịa nguzogide okpomọkụ ya.N'ime uzuoku na-ekpo ọkụ na 230ºC, ọ dịghị mgbanwe n'ọdịdị mgbe ihe fọrọ nke nta ka ọ bụrụ 100 awa.N'okpuru otu ọnọdụ ahụ, fluororubber, silicone roba, fluorosilicon roba, roba butyl, rọba nitrile, na roba eke ga-enwe mmebi doro anya n'ọdịdị ka obere oge gachara.
5. Nguzogide mmiri dị ọkụ
Ethylene-propylene roba nwekwara nguzogide mmiri dị ọkụ karịa, mana ọ nwere njikọ chiri anya na sistemu vulcanization niile.Ethylene-propylene roba na dimorpholine disulfide na TMTD dị ka vulcanization usoro nwere obere mgbanwe na n'ibu Njirimara mgbe etinyere ya na mmiri dị ọkụ na 125 Celsius C maka ọnwa 15, na ọnụ ọgụgụ mgbasawanye olu bụ naanị 0.3%.
6. Ngwa eletriki
Ethylene-propylene roba nwere ọmarịcha ihe mkpuchi ọkụ eletrik na nguzogide corona, yana akụrụngwa eletrik ya dị elu karịa ma ọ bụ nso nke rọba styrene-butadiene, polyethylene chlorosulfonated, polyethylene na njikọ polyethylene.
7. Ngbanwe
N'ihi na ọ dịghị polar substituents na molekụla Ọdịdị nke ethylene-propylene roba, na cohesive ike nke molekul dị ala, na molekul yinye nwere ike ịnọgide na-enwe mgbanwe na a dịgasị iche iche, nke abụọ naanị eke roba na butadiene roba, na ka nwere ike ịnọgide na-enwe. ya na obere okpomọkụ.
8. Nguzogide ịka nká
Ethylene-propylene roba nwere ọmarịcha ihu igwe na-eguzogide ihu igwe, nguzogide ozone, nguzogide okpomọkụ, acid na alkali, mgbochi mmiri, nkwụsi ike agba, ihe ọkụ eletrik, ndochi mmanụ na mmiri ọkụ ụlọ.Enwere ike iji ngwaahịa rọba ethylene-propylene mee ogologo oge na 120 Celsius, enwere ike iji ya nwa oge ma ọ bụ obere oge na 150-200 Celsius.Ịgbakwunye onye na-egbochi ịka nká kwesịrị ekwesị nwere ike ịbawanye okpomọkụ ọrụ ya.Nri nri EPDM roba hose (EPDM hose) cross-njikọ na peroxide nwere ike iji n'okpuru ọnọdụ ọjọọ.N'okpuru ọnọdụ nke ozone ntinye nke 50pphm na agbatị 30%, roba EPDM nwere ike iru karịa 150h na-enweghị mgbawa.
Oge nzipu: Mar-31-2023