1. Dheefsiga
Rabadhka Ethylene-propylene wuxuu leeyahay tamar isku xidhan oo hooseeya sababtoo ah la'aanta kooxaha firfircoon ee qaab-dhismeedka molecular.Intaa waxaa dheer, caaggu waa sahlan tahay in la boodo, iyo is-ku dhejinta iyo isku dhejinta labada dhinacba waa mid aad u liidata.
Roodhka Ethylene Propylene oo La Bedelay Noocyo
Tan iyo markii EPDM iyo EPDM caag si guul leh loo sameeyay dabayaaqadii 1950-meeyadii iyo horraantii 1960-meeyadii, noocyo kala duwan oo ah caag ethylene propylene oo la beddelay iyo caag ethylene propylene thermoplastic (sida EPDM/PE) ayaa ka soo muuqday adduunka, sidaas darteed bixinta codsiga ballaaran ee caagga ethylene propylene waxay bixisaa noocyo badan iyo darajooyin.Rabadhka ethylene-propylene ee la beddelay ayaa inta badan ku lug leh bromination, koloriin, sulfonation, anhydride maleic, anhydride maleic, wax ka beddelka silikoon, iyo wax ka beddelka nylon ee caagga ethylene-propylene.Rabadhka Ethylene-propylene sidoo kale wuxuu leeyahay meeshoodii acrylonitrile, acrylate iyo wixii la mid ah.Sanadihii la soo dhaafay, alaabooyin badan oo polymer ah oo leh sifooyin dhammaystiran oo wanaagsan ayaa la helay iyadoo la adeegsanayo isku-darka, isku-dhafka, buuxinta, tallaalka, xoojinta iyo isku-darka unugyada.Caag Ethylene-propylene ah ayaa sidoo kale si weyn loogu wanaajiyay waxqabadka iyada oo loo marayo wax ka beddel, taas oo balaadhisa kala duwanaanta codsiga ee caagga ethylene-propylene.
Rabadhka ethylene propylene ee la buriyey waxaa lagu farsameeyaa wakiilka brominating ee warshad furan.Bromination ka dib, caagga ethylene-propylene wuxuu hagaajin karaa xawaaraha vulcanization iyo waxqabadka adhesion, laakiin xooggiisa farsamaysan ayaa hoos u dhacaya, sidaas darteed caagga ethylene-propylene brominated ayaa kaliya ku habboon lakabka dhexe ee caag ethylene-propylene iyo caag kale.
Rabadhka ethylene propylene ee koloriin leh waxa lagu sameeyaa iyada oo gaaska chlorine dhex mara xalka caag EPDM.Koloriinta caagga ethylene-propylene waxay kordhin kartaa xawaaraha vulcanization iyo waafaqid la gorgortanka aan saturated, caabbinta olol, caabbinta saliidda, iyo waxqabadka adhesion sidoo kale waa la wanaajiyey.
Rabadhka sulfonated ethylene propylene waxaa lagu sameeyaa iyada oo lagu milmo caag EPDM dareere ah laguna daaweeyaa wakiilka sulfonating iyo wakiilka dhexdhexaadinta.Rabadhka sulfonated ethylene propylene waxa si balaadhan loogu isticmaali doonaa xabag, maryaha dahaarka leh, dhisidda hilibka caatada ah ee biyuhu aanay biyuhu karin, iyo dahaarka ka hortagga daxalka taas oo ay ugu wacan tahay sifooyinkeeda elastomer-ka heerkulbeegga ah iyo waxyaabaha ku dheggan ee wanaagsan.
Tallaalka acrylonitrile-ku-meel-gaadhka ah ee ethylene-propylene waxay isticmaashaa toluene sida dareere ah iyo aalkolada benzyl perchlorinated si ay ugu tallaalto acrylonitrile oo ku dul tallaalo ethylene-propylene caag ah 80°C.Acrylonitrile-la beddelay caag ethylene-propylene ma aha oo kaliya xajiya iska caabbinta daxalka ethylene-propylene caag ah, laakiin sidoo kale waxay helaysaa caabbinta saliid u dhiganta nitrile-26, oo uu leeyahay sifooyinka jirka iyo farsamada ka wanaagsan iyo sifooyinka processing.
Thermoplastic ethylene propylene caag (EPDM/PP) waxay ku salaysan tahay caag EPDM iyo polypropylene si la isku qaso.Isla mar ahaantaana, waa badeeco ka dhigaysa caagga ethylene-propylene inuu gaaro heerka la filayo ee isku-tallaabta.Ma aha oo kaliya in ay xajisato sifooyinka dabiiciga ah ee caagga ethylene-propylene marka la eego waxqabadka, laakiin sidoo kale waxay leedahay waxqabadka tignoolajiyada cajiibka ah ee duritaanka, extrusion, dharbaaxo qaabeynta iyo calending of thermoplastics.
2. Cufnaanta hoose iyo hantida buuxinta sare
Cufnaanta caagga ethylene propylene waa caag hoose, cufnaantiisuna waa 0.87.Intaa waxaa dheer, saliid aad u badan ayaa lagu buuxin karaa oo lagu dari karaa, sidaas darteed qiimaha alaabooyinka caagga ah waa la dhimi karaa, iyo khasaaraha qiimaha sare ee ethylene-propylene caag cayriin ah ayaa la samayn karaa.Wixii caag ethylene-propylene leh oo leh qiime sare oo Mooney ah, tamarta jireed iyo farsamada waa la dhimi karaa ka dib marka la buuxiyo sare.aan weynayn.
3. Iska caabinta daxalka
Sababtoo ah la'aanta polarity iyo heerka hoose ee unsaturation ee caagga ethylene-propylene, waxay leedahay iska caabin wanaagsan oo ka mid ah kiimikooyinka kala duwan ee polar sida khamriga, acids, alkalis, oxidants, qaboojiyaha, saabuunta, saliidaha xayawaanka iyo khudradda, ketones iyo dufanka, iwm. ;Laakiin dareerayaasha aliphatic iyo caraf udgoon (sida shidaalka, benzene, iwm) iyo xasilloonida liidata ee saliidda macdanta.Waxqabadku wuxuu sidoo kale hoos u dhigi doonaa waxqabadka muddada-dheer ee aashitada xoogga leh.TS ISO / TO 7620, ku dhawaad 400 nooc oo kiimikooyin gaas wasakhaysan iyo kiimiko dareere ah ayaa lagu ururiyaa sifooyinka caag kala duwan, iyo 1-4 darajooyin ayaa lagu qeexay si loo muujiyo heerka ficilka, iyo saameynta kiimikooyinka daxalka ah ee guryaha caagga ah:
Heerka Heerka Bararka Heerka /% Qiimaha dhimista adayga Saamaynta waxqabadka
1 <10 <10 wax yar ama midna
2 10-20 <20 ka yar
3 30-60 <30 Dhexdhexaad
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.Uumiga kulul ee 230°C, ma jiro wax isbedel ah oo muuqaal ah kadib ku dhawaad 100 saacadood.Isla shuruudo isku mid ah, caag silikoon ah, caag fluorosilicone, caag butyl ah, caag nitrile ah, iyo caag dabiici ah ayaa la kulmi doona muuqaal ahaan sii xumaanaya 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.Rabadhka ethylene-propylene oo leh dimorpholine disulfide iyo TMTD sida nidaamka vulcanization ayaa wax yar ka beddelaya sifooyinka farsamada ka dib markii lagu qooyay biyo kulul 125 ° C muddo 15 bilood ah, iyo heerka fidinta mugga waa 0.3% oo keliya.
6. Guryaha korantada
Rabadhka Ethylene-propylene wuxuu leeyahay sifooyin koronto oo heer sare ah iyo iska caabin koronto ah, sifooyinkiisa korantada ayaa ka sarreeya ama ku dhow kuwa caagga styrene-butadiene, polyetylen chlorosulfonated, polyetylen iyo polyetylen iskutallaabta.
7. Elasticity
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 dabacsanaanta ballaaran, oo keliya marka loo eego caagga dabiiciga ah iyo caagga butadiene, oo weli sii wadi kara. waa heerkul hoose.
8. Iska caabinta gabowga
Rabadhka Ethylene-propylene wuxuu leeyahay iska caabin cimilo oo heer sare ah, caabbinta ozone, caabbinta kulaylka, caabbinta aashitada iyo alkali, caabbinta uumiga biyaha, xasilloonida midabka, guryaha korantada, buuxinta saliidda iyo dareeraha heerkulka qolka.Alaabooyinka caagga ah ee Ethylene-propylene waxaa la isticmaali karaa waqti dheer 120 ° C, waxaana loo isticmaali karaa si ku meel gaar ah ama si joogto ah 150-200 ° C.Ku darida wakiilka ku haboon ee gabowga ayaa kordhin kara heerkulka adeegiisa.Heerka cuntada EPDM tuubada caagga ah (EPDM tuubada) ee iskutallaabta leh ee peroxide waxaa loo isticmaali karaa xaalado adag.Marka la eego shuruudaha fiirsashada ozone ee 50pphm iyo fidinta 30%, caag EPDM wuxuu gaari karaa in ka badan 150h iyada oo aan dillaacin.
Waqtiga boostada: Mar-31-2023