1. Cufnaanta hoose iyo buuxinta sare
Rabadhka Ethylene-propylene waa caag leh cufnaanta hoose, oo leh cufnaanta 0.87.Intaa waxaa dheer, waxaa lagu buuxin karaa xaddi badan oo saliid ah iyo EPDM.
Ku darista wax-buuxiyeyaasha waxay hoos u dhigi kartaa qiimaha alaabta caagga ah waxayna ka dhigi kartaa qiimaha sarreeya ee caagga ceyriinka ah ee ethylene propylene.Wixii caag ah ethylene propylene oo leh qiime sare oo Mooney ah, tamarta jirka iyo farsamada ee buuxinta sare si weyn looma dhimin.
2. Iska caabinta gabowga
Rabadhka Ethylene-propylene wuxuu leeyahay iska caabin cimilo oo aad u wanaagsan, caabbinta ozone, caabbinta kulaylka, caabbinta aashitada iyo alkali, caabbinta uumiga biyaha, xasiloonida midabka, guryaha korantada, guryaha buuxinta saliida iyo dareeraha heerkulka qolka.Alaabooyinka caagga ah ee Ethylene-propylene waxaa la isticmaali karaa waqti dheer 120 ° C, waxaana loo isticmaali karaa si kooban ama si isdaba joog ah 150-200 ° C.Ku darida antioxidants ku habboon waxay kordhin kartaa heerkulka isticmaalka.EPDM caag iskutallaab ah oo leh peroxide waxaa loo isticmaali karaa xaalado adag.Rabadhka EPDM wuxuu gaari karaa in ka badan 150h isagoon dillaacin xaaladaha fiirsashada ozone 50pphm iyo 30% kala bixin.
3. Iska caabin daxalka
Sababtoo ah caagga ethylene propylene ayaa ka maqan polarity iyo heerka hoose ee unsaturation, waxay leedahay iska caabin wanaagsan oo ku saabsan kiimikooyinka kala duwan ee polar sida khamriga, acids, alkalis, oxidants, qaboojiyaha, saabuunta, saliidaha xayawaanka iyo khudradda, ketones iyo dufanka.Laakiin waxay leedahay xasillooni liidata dareerayaasha dufanka leh iyo kuwa udgoonka ah (sida shidaalka, benzene, iwm.) iyo saliidda macdanta.Waxqabadku wuxuu sidoo kale hoos u dhigi doonaa waxqabadka muddada-dheer ee aashitada xoogga leh.TS ISO/TO 7620, ku dhawaad 400 oo nooc oo kiimikooyin gaas ah iyo dareere ah ayaa soo ururiyay macluumaad ku saabsan guryaha caagga ah ee kala duwan, waxayna qeexeen 1-4 heerar si ay u muujiyaan heerka ficilkooda, iyo saameynta kiimikooyinka daxalka leh ee guryaha caagga ah.
Heerka Heerka Bararka/% Qiimaha dhimista adayga Saamaynta waxqabadka
1 <10 <10 yar ama maya
2 10-20 <20 ka yar
3 30-60 <30 dhexdhexaad ah
4>60>30 daran
4. U adkaysiga uumiga biyaha
Rabadhka Ethylene-propylene wuxuu leeyahay iska caabbinta uumiga biyaha oo aad u wanaagsan waxaana lagu qiyaasaa inuu ka wanaagsan yahay caabbinta kulaylka.230℃ uumi kulul, muuqaalka EPDM isma beddelin ka dib ku dhawaad 100 saacadood.Si kastaba ha noqotee, isla shuruudo la mid ah, caag fluorine, caag silikoon, caag fluorosilicone, caag butyl, caag nitrile, iyo caag dabiici ah ayaa muuqaal ahaan ka sii dartay muddo gaaban ka dib.
5. Iska caabbinta biyaha kulul
Rabadhka Ethylene-propylene sidoo kale wuxuu leeyahay iska caabin ka wanaagsan biyaha kulul, laakiin waxay si dhow ula xiriirtaa dhammaan nidaamyada vulcanization.Ethylene-propylene caag leh dimorpholine disulfide iyo TMTD oo ah nidaamka vulcanization, ka dib markii lagu dhex geliyo biyaha kulul ee 125 ° C ee bilaha 15, sifooyinka farsamada ayaa isbeddelaya wax yar, heerka ballaarinta mugga waa kaliya 0.3%.
6. Waxqabadka korontada
Rabadhka Ethylene-propylene wuxuu leeyahay sifooyin koronto oo heer sare ah iyo iska caabin koronto ah, sifooyinkiisa korantada ayaa ka wanaagsan ama ku dhow kuwa caagga styrene-butadiene, polyetylen chlorosulfonated, polyetylen iyo polyetylen iskutallaabta.
7. Dabacsanaan
Sababtoo ah ma jiraan wax beddelaad ah oo ku jira qaab-dhismeedka molecular ee caagga ethylene-propylene, tamarta isku dhafan ee molecule waa mid hooseeya, silsiladda molecular waxay ilaalin kartaa dabacsanaan ballaaran oo ballaadhan, oo keliya marka loo eego dabiiciga dabiiciga ah iyo caagga butadiene, oo weli waa la heli karaa. lagu hayo heerkul hooseeya.
8. Adhesion
Ethylene-propylene caag ka maqan kooxo firfircoon sababta oo ah qaab-dhismeedka molecular oo uu leeyahay tamar isku xidhan oo yar.Intaa waxaa dheer, caaggu waa sahlan tahay in uu ubaxo, is-ku-dhejintiisa iyo isku dhejinta labada dhinacba waa mid aad u liidata.
Waqtiga boostada: Nov-17-2021