1. Adhesiveness
Ethylene-propylene roba ni agbara isọdọkan kekere nitori aini awọn ẹgbẹ ti nṣiṣe lọwọ ninu eto molikula rẹ.Ni afikun, rọba rọrun lati tan, ati ifaramọ ara ẹni ati ifaramọ ara ẹni ko dara pupọ.
Ethylene Propylene roba títúnṣe Orisirisi
Niwọn igba ti EPDM ati EPDM roba ti ni idagbasoke ni aṣeyọri ni awọn ọdun 1950 ati ibẹrẹ 1960, ọpọlọpọ awọn roba ethylene propylene ti a ṣe atunṣe ati roba ethylene propylene thermoplastic (gẹgẹbi EPDM/PE) ti han ni agbaye, nitorinaa pese Ohun elo jakejado ti roba ethylene propylene. pese afonifoji orisirisi ati onipò.Rọba ethylene-propylene ti a ṣe atunṣe ni pataki pẹlu bromination, chlorination, sulfonation, anhydride maleic, anhydride maleic, iyipada silikoni, ati iyipada ọra ti roba ethylene-propylene.Ethylene-propylene roba tun ti tirun acrylonitrile, acrylate ati bẹbẹ lọ.Ni awọn ọdun diẹ, ọpọlọpọ awọn ohun elo polima pẹlu awọn ohun-ini okeerẹ to dara ni a ti gba nipasẹ ọna ti idapọmọra, copolymerization, kikun, grafting, imudara ati idapọ molikula.Ethylene-propylene roba tun ti ni ilọsiwaju pupọ ni iṣẹ nipasẹ iyipada, nitorinaa faagun iwọn ohun elo ti roba ethylene-propylene.
roba ethylene propylene roba ti wa ni ilọsiwaju nipasẹ brominating oluranlowo lori ohun-ìmọ ọlọ.Lẹhin ti bromination, ethylene-propylene roba le mu iyara vulcanization rẹ dara si ati iṣẹ adhesion, ṣugbọn agbara ẹrọ rẹ dinku, nitorinaa brominated ethylene-propylene roba jẹ nikan dara fun Layer intermediary ti roba ethylene-propylene ati awọn roba miiran.
Rọba ethylene propylene chlorinated ni a ṣe nipasẹ gbigbe gaasi chlorine nipasẹ ojutu roba EPDM.Chlorination ti roba ethylene-propylene le mu iyara vulcanization pọ si ati ibaramu pẹlu iṣunadura ti ko ni itara, aabo ina, resistance epo, ati iṣẹ adhesion tun dara si.
Sulfonated ethylene propylene roba ti wa ni ṣe nipa tu EPDM roba ni a epo ati ki o toju o pẹlu kan sulfonating oluranlowo ati neutralizing oluranlowo.Sulfonated ethylene propylene roba yoo ṣee lo ni lilo pupọ ni awọn adhesives, awọn aṣọ ti a fi bo, kikọ ẹran ti ko ni omi ti ko ni omi, ati awọn ohun-ọṣọ ipata nitori awọn ohun-ini elastomer thermoplastic ati awọn ohun-ini ifaramọ to dara.
Akirilonitrile-roba ethylene-propylene rọba nlo toluene bi epo ati ọti benzyl perchlorinated bi olupilẹṣẹ lati alọmọ acrylonitrile sori roba ethylene-propylene ni 80°C.Acrylonitrile-títúnṣe ethylene-propylene roba ko nikan da duro awọn ipata resistance ti ethylene-propylene roba, sugbon tun gba awọn epo resistance deede si nitrile-26, ati ki o ni dara ti ara ati darí ini ati processing-ini.
Thermoplastic ethylene propylene roba (EPDM/PP) da lori EPDM roba ati polypropylene fun dapọ.Ni akoko kanna, o jẹ ọja ti o jẹ ki roba ethylene-propylene de ipele ti a reti ti ikorita.Kii ṣe nikan ṣe idaduro awọn abuda atorunwa ti roba ethylene-propylene ni awọn iṣe ti iṣẹ, ṣugbọn tun ni iṣẹ ṣiṣe imọ-ẹrọ iyalẹnu ti abẹrẹ, extrusion, mimu fifun ati isọdọtun ti thermoplastics.
2. Iwọn iwuwo kekere ati ohun-ini kikun kikun
Awọn iwuwo ti ethylene propylene roba jẹ rọba kekere, ati iwuwo rẹ jẹ 0.87.Ni afikun, iye nla ti epo le kun ati pe a le fi awọn ohun elo kun, nitorina iye owo awọn ọja roba le dinku, ati pe aila-nfani ti idiyele giga ti ethylene-propylene roba raw roba le ṣee ṣe fun.Fun roba ethylene-propylene pẹlu iye Mooney giga, agbara ti ara ati ẹrọ le dinku lẹhin kikun giga.ko tobi.
3. Idaabobo ipata
Nitori aini polarity ati iwọn kekere ti unsaturation ti roba ethylene-propylene, o ni resistance to dara si ọpọlọpọ awọn kemikali pola gẹgẹbi ọti, acids, alkalis, oxidants, refrigerants, detergents, eranko ati Ewebe epo, ketones ati awọn ọra, ati bẹbẹ lọ. ;Ṣugbọn ni aliphatic ati awọn ohun elo aromatic (gẹgẹbi petirolu, benzene, bbl) ati iduroṣinṣin ti ko dara ni epo nkan ti o wa ni erupe ile.Iṣẹ naa yoo tun kọ silẹ labẹ iṣẹ igba pipẹ ti acid ti o ni idojukọ.Ni ISO / TO 7620, o fẹrẹ to awọn iru 400 ti gaseous ibajẹ ati awọn kemikali olomi ni a gba lori awọn ohun-ini ti ọpọlọpọ awọn rubbers, ati pe awọn onipò 1-4 ti wa ni pato lati tọka iwọn iṣe, ati ipa ti awọn kemikali ipata lori awọn ohun-ini roba:
Oṣuwọn Iwiwu Iwọn Ite /% Iwọn idinku Lile Ipa lori iṣẹ ṣiṣe
1 <10 <10 diẹ tabi rara
2 10-20 <20 kere
3 30-60 <30 Dede
4>60>30 àìdá
4. Omi oru resistance
Ethylene-propylene roba ni o ni o tayọ omi oru resistance ati ti wa ni ifoju-lati wa ni dara ju awọn oniwe-ooru resistance.Ninu ategun ti o gbona ni iwọn 230, ko si iyipada ninu irisi lẹhin awọn wakati 100.Labẹ awọn ipo kanna, fluororubber, roba silikoni, roba fluorosilicone, roba butyl, roba nitrile, ati roba adayeba yoo ni iriri ibajẹ ti o han gbangba ni irisi lẹhin igba diẹ diẹ.
5. Resistance si superheated omi
roba Ethylene-propylene tun ni resistance to dara julọ si omi ti o gbona, ṣugbọn o ni ibatan pẹkipẹki si gbogbo awọn ọna ṣiṣe vulcanization.Ethylene-propylene roba pẹlu dimorpholine disulfide ati TMTD bi eto vulcanization ti ni iyipada diẹ ninu awọn ohun-ini ẹrọ lẹhin ti a fi sinu omi ti o gbona ni 125 ° C fun awọn osu 15, ati pe iwọn didun iwọn didun jẹ 0.3% nikan.
6. Itanna-ini
Ethylene-propylene roba ni awọn ohun-ini idabobo itanna to dara julọ ati resistance corona, ati awọn ohun-ini itanna rẹ ga ju tabi sunmọ awọn ti roba styrene-butadiene, polyethylene chlorosulfonated, polyethylene ati polyethylene ti o ni asopọ agbelebu.
7. Rirọ
Nitoripe ko si awọn aropo pola ninu eto molikula ti roba ethylene-propylene, agbara isọdọkan ti molikula jẹ kekere, ati pe ẹwọn molikula le ṣetọju irọrun ni iwọn jakejado, keji nikan si roba adayeba ati roba butadiene, ati pe o tun le ṣetọju o ni awọn iwọn otutu kekere.
8. Idaabobo ti ogbo
Ethylene-propylene roba ni o ni oju ojo ti o dara ju, osonu resistance, ooru resistance, acid ati alkali resistance, omi oru resistance, awọ iduroṣinṣin, itanna-ini, epo nkún ati ki o yara otutu fluidity.Awọn ọja roba Ethylene-propylene le ṣee lo fun igba pipẹ ni 120 ° C, ati pe o le ṣee lo fun igba diẹ tabi ni igba diẹ ni 150-200°C.Ṣafikun aṣoju egboogi-ogbo ti o dara le mu iwọn otutu iṣẹ rẹ pọ si.Ipele ounjẹ EPDM roba okun (EPDM hose) agbelebu-ti sopọ pẹlu peroxide le ṣee lo labẹ awọn ipo lile.Labẹ awọn ipo ti osonu ifọkansi ti 50pphm ati nínàá ti 30%, EPDM roba le de ọdọ diẹ sii ju 150h lai wo inu.
Akoko ifiweranṣẹ: Mar-31-2023