1 Lastikuw sugandili
Plate heat exchanger rubber gasket waati kelen na gazi fan fɛ ka funteni caman, ji fan fɛ jɔyɔrɔ ka bon degun, ani fana ka contact ni fiɲɛ ye, baarakɛcogo ka ca ka tɛmɛn. O la, a fɛn ka kan ka kɛ funteni degun kunbɛncogo ɲumanba ye, wa a bɛ se ka ji cɛmancɛ ni a ka watara muɲu. O cogo la, ka kan ka poropilini mass fraction sugandi min ye 40% ~ 50 % ye EPDM la, barisa nin EPDM elasticité suguya in de ka fisa.
EPDM ni monomɛri sabanan ka mass fraction ka bon, a ka elasticité ka ɲi ani a ka compression set ka dɔgɔn; nka, k’a sababu kɛ ɲɔgɔndanba ye, a sɔgɔli fanga ni a janya kari waati bɛ dɔgɔya, wa kɔrɔya kunbɛnni fana man ɲi. Ka fara o kan, EPDM ka kɔrɔya kunbɛnni ni ENB ye i n’a fɔ monomɛri sabanan, o ka fisa ni EPDM ta ye ni HD ye.
2 Furakɛcogo
A ka c’a la, EPDM lastikuw bɛ se ka vulkanize ni vulkanizecogo suguya fila ye: perokisidi ni sulfure yellow vulcanization. Perokisidi vulkanizasiyɔn sitɛmu ka ɲɔgɔndan jɛɲɔgɔnya ye CC sirili ye, ka sɔrɔ kisɛkisɛ vulkanizasiyɔn ka ɲɔgɔndan jɛɲɔgɔnya ye CS sirili ye. CC jɛɲɔgɔnya bɛ sabati kosɛbɛ funteni na ka tɛmɛ CS jɛɲɔgɔnya kan, o la, EPDM lastikuw min bɛ se ka funteni caman kɛlɛ, o bɛ vulkanize ni perokisidi ye. Perokisidi min bɛ kɛ ka caya, o ye DCP ye. DCP tata hakɛ cayalenba fɛ, lastikuw vulkanizelen bɛ wuli dɔɔnin dɔɔnin ka bɔ sulfure dɔgɔyali fɔlɔ la, fanga dɔgɔyalen na ani bɔgɔbɔliba la ka taa fanga bonya la ani bɔgɔbɔli dɔgɔyali la o kɔfɛ, vulkanizasiyɔn hakɛ bɛ bonya ka taa a fɛ, fanga bɛ daminɛ ka dɔgɔya, wa a bɔgɔbɔgɔli bɛ se a danma ma; a laban na, vulkanizant tɛmɛnen kɔfɛ, cakɛda molekilɛri yɔrɔ dɔ bɛ daminɛ ka cakɛda tiɲɛni kari, fanga bɛ to ka dɔgɔya, wa a bɔgɔbɔli bɛ bonya dɔɔnin dɔɔnin.
3.Filɛri
EPDM ye lastikuw ye minnu tɛ kristalɛ ye, lastikuw raw fanga man bon. Nka fanga falen-falen faralen kɔfɛ, fanga bɛ bonya kosɛbɛ. A ka c’a la, fasa minnu bɛ fanga di, olu tɛ nɔba bila funteni kunbɛnni na, nka ni dɔ farala fasa hakɛ kan, o bɛ dɛmɛ hali bi ka lastikuw ka funteni kunbɛncogo ɲɛ, nka a bɛ musakaw fana dɔgɔya.
Ni karɔbɔni nɛrɛma hakɛ bɛ bonya, degun set bɛ dɔgɔya, elasticité bɛ bonya, ani fanga bɛ dɔgɔya. N990 karɔbɔli nɛrɛma fanga ka dɔgɔ kojugu, wa a kɔlɔsili ka gɛlɛn a dilanni na, o de kama a tɛ kɛ. Ni N762 carbon black sugandira, compression set value dɔgɔman bɛ se ka sɔrɔ. Walasa ka karɔbɔli nɛrɛmuguma jɛnsɛnni nɔgɔya ani ka baarakɛcogo ɲuman sɔrɔ, aw bɛ plastiki parafin tulu hakɛ fitinin dɔ sugandi, o min bɛ bɛn etilɛni poropilini lastikuw ma kosɛbɛ.
4. Kɔrɔsilikɛlan
Jɛɲɔgɔnya min tɛ satura, o tɛ EPDM cakɛda kunba kan, hali ni perokisidi vulkanizasiyɔn bɛ se ka kɛ, nka vulkanizasiyɔn teliya bɛ sumaya, crosslinking nafa ka dɔgɔn. Walasa ka vulkanizasiyɔn taabolo sabati ani ka teliya, a ka kan ka baara kɛ ni crosslinking agent ye. TAC/GR furakɛlen ka fisa ni jɛnsɛnni ni peseli ye.
TAC/GR hakɛ cayalenba fɛ, vulcanized rubber ka sɛgɛn fanga, janya kari waati ani compression permanent deformation dɔgɔyara, ani MH nafa min bɛ tension degun basigilen na, o cayara. A bɛ se ka ye ko vulcanized rubber ka crosslinking density ɲɛnabɔra, masinko nafaw dɔgɔyara, nka elasticité kɛra ka bonya. O waati kelen na, ML nafa dɔgɔyara, o b’a jira ko Mooney ka sɔgɔsɔgɔninjɛ dɔgɔyara, lastikuw ka jibɔ cayara, wa a baara ka nɔgɔn; ts1 basigilen ma Changé, wa t 90 hakɛ surunyara, wa a jɛlen don ko vulcanization teliya ɲɛnabɔra. Kɔrɔya baara kɛcogo tun ka dɔgɔ ni TAC/GR 1,5phr ye. O bɛ se ka kɛ sababu ye ka dɛmɛnanw sɔrɔ minnu bɛ ɲɔgɔn cɛ, ka perokisidi vulkanizasiyɔn kɛcogo baara, ka vulkanizasiyɔn waati surunya, ka dɔ bɔ lastikuw molekiyɔmu cakɛda karicogo la ani a danfarabaliya la funteni caman na. Ni a hakɛ cayara kojugu, o bɛ dɔ fara lastikuw kɔrɔbayali kan ani ka dɔ bɔ EPDM ka funteni kunbɛnni na. O kɛlen kɔ ka ɲɔgɔn sanga, compression permanent deformation ka fisa 2phr la, wa funteni resistance tɛ saraka kosɛbɛ, o la TAC/GR bɛ kɛ 2phr la.
5.Antioxydant (banakisɛfagalan).
EPDM bɛ se ka kɛ waati jan kɔnɔ 150 °C la , nka 150 °C kɔfɛ , a mɔlikuluw bɛ daminɛ ka kɔrɔya dɔɔni dɔɔni, wa ni a kɛra 180 °C la , lastikuw molekiyɔmu cakɛda bɛna toli dɔɔni dɔɔni. Walasa k’a baara kɛcogo ɲɛ ka taa a fɛ funteni caman na, a ka kan ka kɛ ni faralifɛnw ye minnu bɛ a tanga. Ji-la-minɛnw ta fan fɛ, farikolo tangalan RD bɛ se ka kɛ, o min bɛ se ka funteni caman kɛlɛ nka a tɛ nɔ bila nɔgɔya la vulkanizasiyɔn na. Ka fara o kan, 0,5phr antioxydant D bɛ se ka kɛ ka se ka oksizɛni kɛlɛ fiɲɛ na ani ka sɛgɛnbaliya kunbɛncogo ɲɛ. RD/anti-butyl hakɛ=1,8/0,5.
Kuncɛli
Ji funteni caman bɛ se ka EPDM lastikuw yiriwa, min sinsinnen bɛ masinko jogo kan, o ye ka kɔrɔya kunbɛncogo caya ani ka dɔ bɔ degun banbali nafa la.
( 1) EPDM lastikuw kɛnɛ bɛ sugandi ni 40%~50% ye poropilini ye ani ENB hakɛ cɛmancɛ tilayɔrɔba ye i n’a fɔ monomɛri sabanan.
( 2) Vulcanization system bɛ DCP/ TAC ta, o min bɛ dɛmɛ ka crosslinking baarakɛcogo ɲɛ, ka kɔrɔya kunbɛnni ani ka baarakɛcogo ɲɛ.
( 3) Aw bɛ baara kɛ ni N762 ye min ka bon ni carbone black ye, o bɛ se ka dɛmɛ don ka kunnafonidilanw ka se ka don u kɔnɔ ani ka kɔrɔya baarakɛcogo ɲɛ, wa o bɛ se ka dɔ bɔ musakaw la.
( 4) Aw bɛ farikolo tangalan RD/antioxydant D ta, ni oksidan RD ye min bɛ funteni caman sɔrɔ, o de ye a kunba ye, ani antioxydant D min bɛ sɛgɛn flexural ani min bɛ se ka ozone kɛlɛ, o ye dɛmɛbaga ye.
( 5) Fɛn dilanni taabolo bɛ vulkanize filanan ta funteni caman na walasa ka dɔ fara vulcanization hakɛ kan.
(6) A jɛlen don ko EPDM ka baara kɛcogo ji ni jisuma na min ka suma kosɛbɛ, o ka fisa ni fiɲɛ ta ye (funteni kelen). Nka hali n’o Kɛra, a ka funteni baara kuntaalajan tɛ Tɛmɛ halibi 150 °C kan ; bɔgɔdaga funteni min ye 165 °C ye , o bɛnnen don, min ka bon kosɛbɛ, o tɛ se ka tɛmɛ 180 °C kan.
