1 Nhọrọ nke rọba raw
Efere okpomọkụ Exchanger roba gasket n'otu oge site gas n'akụkụ nke elu okpomọkụ, mmiri n'akụkụ nke ọrụ nke elu mgbali, na nwekwara kọntaktị na ikuku, na-arụ ọrụ ọnọdụ ndị ọzọ na-achọsi ike. Ya mere, ihe ahụ kwesịrị ịdị mma nke ukwuu na-egbochi mkpakọ okpomọkụ, ma nwee ike iguzogide mmiri mmiri na uzuoku ya. N'ọnọdụ ndị dị otú ahụ, kwesịrị ịhọrọ akụkụ nke propylene mass nke 40% ~ 50 % nke EPDM, n'ihi na ụdị EPDM a kacha mma.
EPDM nwere akụkụ dị elu nke monomer nke atọ nwere ngbanwe dị mma na nhazi mkpakọ dị ala; Otú ọ dị, n'ihi ogo dị elu nke njikọ njikọ, ike nkwụsị na elongation na nkwụsịtụ dị ala, na nkwụsị nke ịka nká dịkwa njọ. Na mgbakwunye, mgbochi ịka nká nke EPDM na ENB dị ka monomer nke atọ dị mma karịa nke EPDM nwere HD.
2 Usoro ọgwụgwọ
N'ozuzu, EPDM rọba nwere ike vulcanized na ụdị abụọ nke vulcanization usoro: peroxide na sulfur odo vulcanization. Usoro njikọ njikọ njikọta nke sistemu vulcanization peroxide bụ njikọ CC, ebe njikọ njikọ njikọ nke sistemu vulcanization sọlfọ bụ njikọ CS. Njikọ CC kwụsiri ike karịa nkekọ CS, yabụ roba EPDM na-eguzogide okpomọkụ dị elu na-eji peroxide kpuchie. peroxide kacha eji eme ihe bụ DCP. Site na mmụba nke usoro DCP, roba vulcanized na-eji nwayọọ nwayọọ gbanwee site na mbụ undersulfurization, ike dị ala na nnukwu nrụrụ na mmụba nke ike na mbelata nke nrụrụ; mgbe ahụ, ogo nke vulcanization na-abawanyewanye, ike na-amalite ịdaba, na nrụrụ ahụ ruru ntakịrị; N'ikpeazụ, mgbe ngafe nke vulcanizing ọrụ, akụkụ nke molekụla yinye na-amalite imebi yinye mebiri emebi, ike na-aga n'ihu na-ada ada, na deformation na-eji nwayọọ nwayọọ na-abawanye.
3.Filler
EPDM bụ nke na-abụghị kristal rọba, raw roba ike adịghị elu. Ma mgbe agbakwunyere ndochi ume, ike na-abawanye nke ukwuu. Ndị na-eme ka ihe na-eme ka ọ dịkwuo elu na-enwekarị mmetụta dị nta na nkwụsị okpomọkụ, ma ịba ụba nke ihe nkpuchi ka na-enyere aka melite nkwụsị okpomọkụ nke rọba, ma na-ebelata ụgwọ ọrụ.
Ka ọkwa nke carbon ojii na-abawanye, nhazi mkpakọ na-ebelata, ngbanwe na-abawanye, ike na-ebelata. Ike nke N990 carbon ojii dị oke ala ma sie ike ịchịkwa na mmepụta, ya mere ejighi ya. Site na ịhọrọ N762 carbon ojii, enwere ike nweta uru setịpụrụ obere mkpakọ. Iji mee ka mgbasa nke carbon ojii dị mfe ma nweta ọrụ nhazi dị mma, họrọ obere mmanụ paraffin nke plasticizer, nke dabara na roba ethylene propylene.
4. Onye na-eme ihe na-agafe agafe
Enweghị njikọ na-akwadoghị na agbụ isi nke EPDM, ọ bụ ezie na enwere ike iji vulcanization peroxide mee ihe, mana ọsọ vulcanization na-adị ngwa ngwa, arụmọrụ crosslinking dị ala. Iji mee ka ọ kwụsie ike ma mee ngwa ngwa usoro vulcanization, ọ dị mkpa iji onye na-ahụ maka crosslinking. TAC/GR a na-emeso dị mma maka mgbasa na ịtụ.
Site na mmụba nke ọnụ ọgụgụ TAC / GR, ike nkwụsịtụ, elongation na nkwụsịtụ na mkpakọ na-adịgide adịgide nke roba vulcanized belatara, uru MH nke nrụgide nkwụsịtụ na-abawanye. Enwere ike ịhụ na njupụta crosslinking nke rubber vulcanized dị mma, ihe ndị na-emepụta ihe na-ebelata, ma elasticity ghọrọ ibu. N'otu oge ahụ, uru ML na-ebelata, na-egosi na Mooney viscosity na-ebelata, a na-eme ka mmiri nke rọba dịkwuo mma, ọ dịkwa mfe nhazi; ts1 agbanwebeghị n'ụzọ bụ isi, yana uru t 90 dị mkpụmkpụ, yana n'ụzọ doro anya ka emelitere ọsọ nke vulcanization. Ọrụ ịka nká dara ogbenye na 1.5phr nke TAC/GR. Nke a nwere ike ịbụ n'ihi ọnụnọ nke enyemaka na-ejikọta ọnụ, mee ka usoro vulcanization peroxide rụọ ọrụ, na-ebelata oge vulcanization, belata ohere nke nkwụsị nke eriri molecular roba na enweghị ike na oke okpomọkụ. Mgbe ego ahụ dị ukwuu, ọ na-eme ka ịka nká na-ejikọta roba ma na-ebelata okpomọkụ nke EPDM. Mgbe atụnyere, mkpakọ na-adịgide adịgide nrụrụ dị mma na 2phr, na okpomọkụ adịghị achụ àjà dị ukwuu, ya mere TAC/GR na-eji na 2phr.
5.Antioxidant
Enwere ike iji EPDM mee ogologo oge na 150 ℃ , ma gafere 150 ℃ , ụmụ irighiri ahụ na-amalite ịka nká nke nta nke nta, na na 180 ℃ , eriri molecular roba ga-eji nwayọọ nwayọọ na-agbaze. Iji meziwanye arụmọrụ ya na oke okpomọkụ, a ghaghị iji ihe mgbakwunye nchebe mee ihe. N'ihe gbasara mgbasa ozi mmiri-vepor, enwere ike iji RD antioxidant, nke na-eguzogide okpomọkụ dị elu mana ọ naghị emetụta ngwa ngwa vulcanization. Na mgbakwunye, enwere ike iji 0.5phr antioxidant D mee ka ikike iguzogide ikuku oxygen sikwuo ike ma melite nkwụsi ike ike ọgwụgwụ. Oke RD/anti-butyl=1.8/0.5.
Mmechi
Mmepe nke elu-okpomọkụ mmiri vepor-eguzogide elu elasticity EPDM roba, na-elekwasị anya bụ izute n'ibu Njirimara n'okpuru premise nke ịkacha ndị ịka nká na-eguzogide ma belata mkpakọ na-adịgide adịgide deformation uru.
(1) A na-ahọrọ roba EPDM raw na 40% ~ 50% nke propylene na ọkara uka nke ENB dị ka monomer nke atọ.
(2) Sistemụ vulcanization na-anabata DCP / TAC, nke na-enyere aka melite arụmọrụ crosslinking, nguzogide ịka nká na arụmọrụ usoro.
( 3) Jiri nnukwu elasticity carbon black N762 dị ka o kwere mee, nke nwere ike inye aka melite nguzogide mgbasa ozi na arụmọrụ ịka nká, ma nwee ike ibelata ọnụ ahịa.
(4) Nabata usoro nchebe nke antioxidant RD/antioxidant D, na-enwe oke okpomọkụ antioxidant RD dị ka nke bụ isi, na ike ọgwụgwụ na-eguzogide na ozone-eguzogide antioxidant D dị ka onye inyeaka.
(5) Usoro mmepụta na-anabata vulcanization nke abụọ na-ekpo ọkụ dị elu iji mee ka ogo nke vulcanization dịkwuo elu.
(6) Arụmọrụ EPDM na mmiri na-ekpo ọkụ na mmiri na-ekpo ọkụ bụ ihe doro anya karịa nke ikuku (otu okpomọkụ). Ma n'agbanyeghị nke ahụ, ojiji ya ogologo oge nke okpomọkụ ka na-adịghị karịa 150 ℃ ; mmetụta okpomọkụ nke 165 ℃ kwesịrị ekwesị, nke kachasị elu enweghị ike gafere 180 ℃.
