1. Hoʻopili
He haʻahaʻa ka ikehu cohesive ʻo Ethylene-propylene rubber ma muli o ka nele o nā pūʻulu hana i loko o kona ʻano mole.Eia kekahi, maʻalahi ka pua, a ʻilihune loa kona paʻa ponoʻī a me ka pili pū kekahi.
Nā ʻano like ʻole i hoʻololi ʻia e ka Ethylene Propylene Rubber
Ma muli o ka hoʻomohala maikaʻi ʻana o EPDM a me EPDM rubber i ka hopena o 1950s a me ka 1960s mua, ua ʻike ʻia nā ʻano like ʻole o ka ethylene propylene rubber a me ka thermoplastic ethylene propylene rubber (e like me EPDM/PE) i ka honua, no laila e hāʻawi ana i ka hoʻohana ākea o ka ethylene propylene rubber. hāʻawi i nā ʻano like ʻole a me nā māka.Hoʻopili ʻia ka ethylene-propylene rubber i hoʻololi ʻia i ka bromination, chlorination, sulfonation, maleic anhydride, maleic anhydride, silicone modification, a me ka hoʻololi nylon o ka ethylene-propylene rubber.Ua hoʻopili pū ʻo Ethylene-propylene rubber i ka acrylonitrile, acrylate a pēlā aku.I loko o nā makahiki, nui nā mea polymer me nā waiwai piha maikaʻi i loaʻa ma ke ʻano o ka hui ʻana, copolymerization, hoʻopiha, grafting, hoʻoikaika a me ka hui pū ʻana.Ua hoʻomaikaʻi maikaʻi ʻia ʻo Ethylene-propylene rubber i ka hana ma o ka hoʻololi ʻana, ma laila e hoʻonui ai i ka laulā noi o ka ethylene-propylene rubber.
Hoʻohana ʻia ka brominated ethylene propylene rubber e ka brominating agent ma kahi wili hāmama.Ma hope o ka bromination, hiki i ka ethylene-propylene rubber ke hoʻomaikaʻi i ka wikiwiki o ka vulcanization a me ka hana adhesion, akā e emi ana kona ikaika mechanical, no laila e kūpono wale ka brominated ethylene-propylene rubber no ka papa waena o ka ethylene-propylene rubber a me nā mea ʻē aʻe.
Hana ʻia ka chlorinated ethylene propylene rubber ma o ka hoʻolilo ʻana i ke kinoea chlorine ma o ka solution rubber EPDM.Hiki i ka chlorination o ka ethylene-propylene rubber ke hoʻonui i ka wikiwiki o ka vulcanization a me ka hoʻohālikelike ʻana me ka negotiable unsaturated, ke kūpaʻa ahi, ka pale ʻana i ka aila, a me ka hana adhesion.
Hana ʻia ka sulfonated ethylene propylene rubber ma ka hoʻoheheʻe ʻana i ka lāʻau EPDM i loko o kahi mea hoʻoheheʻe a mālama ʻia me kahi mea sulfonating a me neutralizing agent.E hoʻohana nui ʻia ka sulfonated ethylene propylene rubber i nā mea hoʻopili, nā lole i uhi ʻia, ke kūkulu ʻana i ka ʻiʻo wīwī wai ʻole, a me nā lining anti-corrosion ma muli o kāna mau waiwai thermoplastic elastomer a me nā waiwai adhesion maikaʻi.
Hoʻohana ʻo Acrylonitrile-grafted ethylene-propylene rubber i ka toluene ma ke ʻano he mea hoʻoheheʻe a me ka waiʻona benzyl perchlorinated ma ke ʻano he mea hoʻomaka e kālai i ka acrylonitrile ma luna o ka ethylene-propylene rubber ma 80°C.ʻAʻole mālama wale ʻo Acrylonitrile i ka ethylene-propylene rubber i ka pale ʻana i ka corrosion o ka ethylene-propylene rubber, akā loaʻa pū nō hoʻi ka pale ʻaila e like me ka nitrile-26, a ʻoi aku ka maikaʻi o ke kino a me ka mechanical a me nā waiwai hana.
Hoʻokumu ʻia ka Thermoplastic ethylene propylene rubber (EPDM/PP) i ka pahu EPDM a me ka polypropylene no ka hui ʻana.I ka manawa like, he huahana ia e hiki ai i ka ethylene-propylene rubber ke kiʻekiʻe o ka crosslinking i manaʻo ʻia.ʻAʻole wale ia e hoʻopaʻa i nā hiʻohiʻona o ka ethylene-propylene rubber ma ke ʻano o ka hana, akā loaʻa pū kekahi i ka hana ʻenehana kupaianaha o ka injection, extrusion, blow molding a me ka calendering o thermoplastics.
2. Haʻahaʻa haʻahaʻa a kiʻekiʻe hoʻopiha waiwai
ʻO ka mānoanoa o ka ethylene propylene rubber he lāʻau haʻahaʻa, a ʻo kona mānoanoa he 0.87.Eia kekahi, hiki ke hoʻopiha ʻia ka nui o ka aila a hiki ke hoʻohui ʻia nā mea hoʻopihapiha, no laila hiki ke hoʻemi ʻia ke kumukūʻai o nā huahana rubber, a hiki ke hana ʻia ka hemahema o ke kumukūʻai kiʻekiʻe o ka ethylene-propylene rubber raw rubber.No ka ethylene-propylene rubber me ka waiwai Mooney kiʻekiʻe, hiki ke hoʻemi ʻia ka ikehu kino a me ka mechanical ma hope o ka hoʻopiha kiʻekiʻe.ʻaʻole nui.
3. Ke kū'ē i ka corrosion
Ma muli o ka nele o ka polarity a me ka haʻahaʻa haʻahaʻa o ka unsaturation o ka ethylene-propylene rubber, he kūʻē maikaʻi ia i nā ʻano mea like ʻole polar e like me nā alcohols, acids, alkalis, oxidants, refrigerants, detergents, holoholona a me nā aila mea kanu, ketones a me nā momona, etc. ;Akā, i loko o aliphatic a me ka aromatic solvents (e like me gasoline, benzene, etc.) a me ka ilihune stability i loko o ka mineral aila.E emi ana ka hana ma lalo o ka hana lōʻihi o ka waikawa concentrated.I ka ISO/TO 7620, kokoke 400 mau ʻano kinoea a me nā wai kemika e hōʻiliʻili ʻia ma nā waiwai o nā ʻāpana like ʻole, a ua kuhikuhi ʻia nā māka 1-4 e hōʻike i ke kiʻekiʻe 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 ma ka hana
1 <10 <10 iki a i ʻole
2 10-20 <20 liʻiliʻi
3 30-60 <30 Kaumaha
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 ka mahu wela loa ma 230°C, ʻaʻohe loli i ka helehelena ma hope o 100 hola.Ma lalo o nā kūlana like, fluororubber, silicone rubber, fluorosilicone rubber, butyl rubber, nitrile rubber, a me ka lāʻau maoli e ʻike i ka pōʻino 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 āpau.ʻO ka ethylene-propylene rubber me ka dimorpholine disulfide a me ka TMTD e like me ka ʻōnaehana vulcanization he liʻiliʻi ka hoʻololi ʻana i nā waiwai mechanical ma hope o ka hoʻonā ʻia ʻana i ka wai wela nui ma 125 ° C no 15 mau mahina, a ʻo 0.3% wale nō.
6. Nā waiwai uila
ʻOi aku ka maikaʻi o kona mau waiwai uila ma mua a kokoke paha i ko ka styrene-butadiene rubber, chlorosulfonated polyethylene, polyethylene a me ka polyethylene cross-linked.
7. Elasticity
No ka mea, ʻaʻohe polar substituents i loko o ka molecular structure of ethylene-propylene rubber, he 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 ʻōpala maoli a me ka rubber butadiene, a hiki ke mālama mau. ia ma na wela haahaa.
8. 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, kaʻakika a me ke kūpaʻa alkali, ke kū'ēʻana o ka mahu wai, ka paʻa o ka waihoʻoluʻu, nā waiwai uila, ka hoʻopihaʻana i kaʻaila a me ka wai wela o ka lumi.Hiki ke hoʻohana ʻia nā huahana ethylene-propylene rubber no ka manawa lōʻihi ma 120 ° C, a hiki ke hoʻohana ʻia no ka manawa pōkole a i ʻole intermittent ma 150-200 ° C.ʻO ka hoʻohui ʻana i kahi mea kūʻē i ka wā kahiko hiki ke hoʻonui i ka mahana lawelawe.Hiki ke ho'ohana 'ia ka paipu EPDM mea'ai (EPDM hose) i ho'ohui 'ia me ka peroxide ma lalo o nā kūlana pa'akikī.Ma lalo o nā kūlana o ka ozone o 50pphm a me 30% ka lōʻihi, hiki i ka lāʻau EPDM ke piʻi ma mua o 150h me ka ʻole o ka haki.
Ka manawa hoʻouna: Mar-31-2023