1. Haʻahaʻa haʻahaʻa a me ka hoʻopiha piha
ʻO ka ethylene-propylene rubber kahi pahu me ka haʻahaʻa haʻahaʻa, me ka nui o 0.87.Eia hou, hiki ke hoʻopihaʻia me ka nui o kaʻaila a me ka EPDM.
ʻO ka hoʻohui ʻana i nā mea hoʻopihapiha hiki ke hōʻemi i ke kumukūʻai o nā huahana lāʻau a hoʻopaʻa ʻia no ke kumukūʻai kiʻekiʻe o ka ethylene propylene rubber raw rubber.No ka ethylene propylene rubber me ka waiwai Mooney kiʻekiʻe, ʻaʻole i hoʻemi nui ʻia ka ikaika kino a me ka mechanical o ka hoʻopiha piha.
2. Ke kūʻē ʻana i ka ʻelemakule
ʻO ka ethylene-propylene rubber ka maikaʻi loa o ka wā, ke kū'ē ozone, ke kū'ē wela, ke kū'ē i ka wai a me ka alkali, ke kū'ēʻana o ka mahu wai, ka paʻa o ka waihoʻoluʻu, nā waiwai uila, nā waiwai hoʻopihaʻaila a me ka wai ma ka lumi wela.Hiki ke hoʻohana ʻia nā huahana ethylene-propylene rubber no ka manawa lōʻihi ma 120 ° C, a hiki ke hoʻohana pōkole a i ʻole intermittent ma 150-200 ° C.Hiki i ka hoʻohui ʻana i nā antioxidants kūpono ke hoʻonui i ka mahana hoʻohana.Hiki ke hoʻohana ʻia ka ʻōpala EPDM i hoʻopili ʻia me ka peroxide ma lalo o nā kūlana paʻakikī.Hiki i ka EPDM rubber ke piʻi aku ma mua o 150h me ka ʻole o ka haki ʻana ma lalo o nā kūlana o ka ozone concentration 50pphm a me 30% kikoo.
3. Ke kū'ē i ka corrosion
No ka nele o ka polarity o ka ethylene propylene rubber a me ka haʻahaʻa haʻahaʻa o ka unsaturation, he kūʻē maikaʻi ʻo ia i nā kemika polar like ʻole e like me ka alcohols, acids, alkalis, oxidants, refrigerants, detergents, nā aila holoholona a me nā mea kanu, nā ketones a me nā momona.Akā, ʻaʻohe paʻa paʻa i nā mea momona a me nā mea ʻala (e like me ka ʻaila, benzene, etc.) a me ka aila mineral.E emi ana ka hana ma lalo o ka hana lōʻihi o ka waika paʻa.Ma ISO/TO 7620, kokoke i 400 mau ʻano kinoea a me nā wai kemika i hōʻiliʻili i ka ʻike e pili ana i nā ʻano waiwai o ka lāʻau lapaʻau, a ua kuhikuhi i nā pae 1-4 e hōʻike i ko lākou pae o ka hana, a me ka hopena o nā kemika corrosive i nā waiwai lāʻau.
Pākuʻi Volume Pehu ʻana/% ka waiwai hoʻemi paʻakikī Ka hopena i ka hana
1 <10 <10 iki a ʻaʻole
2 10-20 <20 liʻiliʻi
3 30-60 <30 waena
4 >60 >30 kaumaha
4. Ke kū'ē i ka mahu wai
ʻOi aku ka maikaʻi o ka ethylene-propylene rubber ma mua o kona kūpaʻa wela.I loko o 230 ℃ ka mahu wela, ʻaʻole i loli ke ʻano o ka EPDM ma hope o 100 mau hola.Eia nō naʻe, ma lalo o nā kūlana like, ʻo ka pulu fluorine, ka ʻili silikoni, ka ʻōpala fluorosilicone, ka pulu butyl, ka nitrile rubber, a me ka ʻōpala maoli i ʻike i ka pōʻino nui o ka helehelena ma hope o kahi manawa pōkole.
5. Ke kū'ē i ka wai wela nui
ʻOi aku ka maikaʻi o ke kūʻē ʻana o ka ethylene-propylene rubber i ka wai wela, akā pili loa ia i nā ʻōnaehana vulcanization a pau.Ethylene-propylene rubber me ka dimorpholine disulfide a me TMTD e like me ka vulcanization system, ma hope o ka hoʻokomo ʻia ʻana i loko o ka wai superheated ma 125 ° C no 15 mau mahina, hoʻololi liʻiliʻi nā mea mechanical, a ʻo ka nui o ka hoʻonui ʻana he 0.3% wale nō.
6. Hana uila
ʻOi aku ka maikaʻi o kona mau waiwai uila ma mua a kokoke paha i nā mea o ka styrene-butadiene rubber, chlorosulfonated polyethylene, polyethylene a me ka polyethylene cross-linked.
7. Hoʻololi
No ka mea, ʻaʻohe polar substituents i loko o ka molecular structure of ethylene-propylene rubber, haʻahaʻa ka ikehu cohesive o ka mole, a hiki i ke kaulahao mole ke hoʻomau i ka maʻalahi i ka laulā ākea, ʻelua wale nō i ka lāʻau kūlohelohe a me ka butadiene. mālama ʻia ma nā mahana haʻahaʻa.
8. Hoʻopili
ʻAʻohe pūʻulu ikaika ka Ethylene-propylene rubber ma muli o kona ʻano molekala a he haʻahaʻa ka ikehu cohesive.Eia kekahi, ua maʻalahi ka pua, a ʻo kona hoʻopili ponoʻī ʻana a me ka pili like ʻana he ʻilihune loa.
Ka manawa hoʻouna: Nov-17-2021