1. Adhesiveness
Ethylene-propylene roj hmab muaj zog cohesive qis vim tsis muaj cov pab pawg nquag hauv nws cov qauv molecular.Tsis tas li ntawd, cov roj hmab yog ib qho yooj yim rau tawg, thiab nws tus kheej-adhesiveness thiab kev sib nrig sib adhesion yog heev tsis zoo.
Ethylene propylene roj hmab hloov ntau yam
Txij li thaum EPDM thiab EPDM roj hmab tau ua tiav tiav nyob rau xyoo 1950s thiab thaum ntxov 1960s, ntau yam hloov kho ethylene propylene roj hmab thiab thermoplastic ethylene propylene roj hmab (xws li EPDM / PE) tau tshwm sim nyob rau hauv lub ntiaj teb no, yog li muab daim ntawv thov dav ntawm ethylene propylene roj hmab. muab ntau yam thiab qib.Hloov kho ethylene-propylene roj hmab feem ntau suav nrog bromination, chlorination, sulfonation, maleic anhydride, maleic anhydride, kev hloov kho silicone, thiab kev hloov kho nylon ntawm ethylene-propylene roj hmab.Ethylene-propylene roj hmab kuj muaj grafted acrylonitrile, acrylate thiab lwm yam.Tau ntau xyoo, ntau cov ntaub ntawv polymer nrog cov khoom zoo tau txais los ntawm kev sib xyaw, copolymerization, txhaws, grafting, kev txhawb zog thiab molecular compounding.Ethylene-propylene roj hmab kuj tau zoo heev nyob rau hauv kev ua tau zoo los ntawm kev hloov kho, yog li nthuav dav daim ntawv thov ntau yam ntawm ethylene-propylene roj hmab.
Brominated ethylene propylene roj hmab yog ua tiav los ntawm brominating tus neeg sawv cev ntawm lub zeb qhib.Tom qab bromination, ethylene-propylene roj hmab tuaj yeem txhim kho nws cov vulcanization ceev thiab adhesion kev ua tau zoo, tab sis nws cov neeg kho tshuab lub zog txo, yog li brominated ethylene-propylene roj hmab tsuas yog haum rau nruab nrab txheej ntawm ethylene-propylene roj hmab thiab lwm yam roj hmab.
Chlorinated ethylene propylene roj hmab yog tsim los ntawm kev hla cov roj chlorine los ntawm EPDM roj hmab kua.Chlorination ntawm ethylene-propylene roj hmab tuaj yeem ua rau kom lub vulcanization ceev thiab sib haum nrog unsaturated negotiable, nplaim tsis kam, roj kuj, thiab adhesion kev ua tau zoo.
Sulfonated ethylene propylene roj hmab yog tsim los ntawm dissolving EPDM roj hmab nyob rau hauv ib tug hnyav thiab kho nws nrog ib tug sulfonating tus neeg saib xyuas thiab neutralizing tus neeg saib xyuas.Sulfonated ethylene propylene roj hmab yuav siv dav hauv cov nplaum nplaum, coated fabrics, tsim cov nqaij ntshiv tsis muaj dej, thiab cov ntaub qhwv los tiv thaiv vim nws cov khoom siv thermoplastic elastomer thiab cov khoom zoo adhesion.
Acrylonitrile-grafted ethylene-propylene roj hmab siv cov toluene ua cov kuab tshuaj thiab perchlorinated benzyl cawv raws li tus thawj coj rau graft acrylonitrile mus rau ethylene-propylene roj hmab ntawm 80 ° C.Acrylonitrile-hloov ethylene-propylene roj hmab tsis tsuas yog khaws cov corrosion kuj ntawm ethylene-propylene roj hmab, tab sis kuj tau txais cov roj kuj sib npaug rau nitrile-26, thiab muaj lub cev zoo dua thiab cov khoom siv kho mob thiab kev ua haujlwm.
Thermoplastic ethylene propylene roj hmab (EPDM / PP) yog raws li EPDM roj hmab thiab polypropylene rau kev sib tov.Nyob rau tib lub sijhawm, nws yog cov khoom lag luam uas ua rau ethylene-propylene roj hmab ncav cuag qhov kev cia siab ntawm kev sib txuas.Nws tsis tsuas yog khaws cov yam ntxwv tseem ceeb ntawm ethylene-propylene roj hmab raws li kev ua tau zoo, tab sis kuj muaj kev ua tau zoo tshaj plaws ntawm kev txhaj tshuaj, extrusion, tshuab molding thiab calendering ntawm thermoplastics.
2. Tsawg ceev thiab siab filling khoom
Qhov ceev ntawm ethylene propylene roj hmab yog cov roj hmab qis, thiab nws qhov ceev yog 0.87.Tsis tas li ntawd, cov roj ntau ntau tuaj yeem sau thiab muab cov khoom ntim ntxiv, yog li tus nqi ntawm cov khoom siv roj hmab tuaj yeem txo qis, thiab qhov tsis zoo ntawm tus nqi siab ntawm ethylene-propylene roj hmab roj hmab nyoos tuaj yeem ua rau.Rau ethylene-propylene roj hmab nrog cov nqi siab Mooney, lub zog ntawm lub cev thiab txhua yam tuaj yeem raug txo qis tom qab siab filling.tsis loj.
3. Corrosion kuj
Vim tias tsis muaj polarity thiab qis qis ntawm unsaturation ntawm ethylene-propylene roj hmab, nws muaj kev tiv thaiv zoo rau ntau yam tshuaj polar xws li cawv, acids, alkalis, oxidants, refrigerants, detergents, tsiaj thiab zaub roj, ketones thiab rog, thiab lwm yam. ;Tab sis nyob rau hauv aliphatic thiab aromatic solvents (xws li roj av, benzene, thiab lwm yam) thiab tsis zoo stability nyob rau hauv cov ntxhia roj.Qhov kev ua tau zoo kuj tseem yuav poob qis raws li kev ua haujlwm ntev ntawm cov kua qaub.Nyob rau hauv ISO / TO 7620, ze li ntawm 400 hom corrosive gaseous thiab kua chemicals tau sau rau ntawm cov khoom ntawm ntau yam roj hmab, thiab 1-4 qib tau teev tseg los qhia txog qib ntawm kev ua, thiab qhov cuam tshuam ntawm cov tshuaj corrosive ntawm cov khoom roj hmab:
Qib Volume o tus nqi /% Hardness txo tus nqi cuam tshuam rau kev ua haujlwm
1 <10 <10 me ntsis lossis tsis muaj
2 10-20 <20 me
3 30-60 <30 Ib
4> 60> 30 mob hnyav
4. Dej vapor tsis kam
Ethylene-propylene roj hmab muaj cov dej vapor kuj zoo heev thiab kwv yees tias yuav zoo dua li nws cov cua sov.Hauv chav superheated ntawm 230 ° C, tsis muaj qhov hloov pauv hauv qhov tsos tom qab ze li 100 teev.Nyob rau hauv tib lub sijhawm, fluororubber, silicone roj hmab, fluorosilicone roj hmab, butyl roj hmab, nitrile roj hmab, thiab cov roj hmab ntuj yuav pom pom kev tsis zoo tom qab lub sijhawm luv luv.
5. Resistance rau superheated dej
Ethylene-propylene roj hmab kuj muaj kev tiv thaiv zoo rau cov dej superheated, tab sis nws muaj feem xyuam nrog txhua lub tshuab vulcanization.Cov roj hmab ethylene-propylene nrog dimorpholine disulfide thiab TMTD raws li cov vulcanization system muaj kev hloov pauv me ntsis ntawm cov khoom siv tom qab tau soaked hauv dej superheated ntawm 125 ° C rau 15 lub hlis, thiab qhov ntim nthuav dav tsuas yog 0.3%.
6. Cov khoom siv hluav taws xob
Ethylene-propylene roj hmab muaj cov khoom siv hluav taws xob zoo heev thiab tiv thaiv corona, thiab nws cov khoom siv hluav taws xob zoo dua los yog ze rau cov roj hmab styrene-butadiene, chlorosulfonated polyethylene, polyethylene thiab cross-linked polyethylene.
7. elasticity
Vim tias tsis muaj cov polar substituents nyob rau hauv cov qauv molecular ntawm ethylene-propylene roj hmab, lub zog cohesive ntawm cov molecule yog tsawg, thiab cov saw molecular muaj peev xwm tswj tau yooj yim nyob rau hauv ib tug ntau yam, thib ob tsuas yog cov roj hmab ntuj thiab butadiene roj hmab, thiab tseem muaj peev xwm tswj tau. nws ntawm qhov kub thiab txias.
8. Kev laus tsis kam
Ethylene-propylene roj hmab muaj cov huab cua zoo heev, ozone tsis kam, kub tsis kam, acid thiab alkali tsis kam, dej vapor tsis kam, xim stability, hluav taws xob khoom, roj filling thiab chav dej fluidity.Cov khoom siv roj hmab Ethylene-propylene tuaj yeem siv tau ntev ntawm 120 ° C, thiab tuaj yeem siv tau ib ntus lossis ntu ntu ntawm 150-200 ° C.Ntxiv cov tshuaj tiv thaiv kev laus tsim nyog tuaj yeem ua rau nws qhov kub thiab txias.Khoom noj khoom haus qib EPDM roj hmab hose (EPDM hose) cross-linked nrog peroxide tuaj yeem siv rau hauv cov xwm txheej hnyav.Nyob rau hauv cov xwm txheej ntawm ozone concentration ntawm 50ppm thiab ncab ntawm 30%, EPDM roj hmab tuaj yeem ncav cuag ntau tshaj 150h yam tsis muaj kev tawg.
Post lub sij hawm: Mar-31-2023