1. Manne
Ethylene-propylene roba yana da ƙananan ƙarfin haɗin gwiwa saboda rashin ƙungiyoyi masu aiki a cikin tsarin kwayoyin halitta.Bugu da kari, roba yana da sauƙin fure, kuma mannewa kansa da mannewar juna ba su da kyau sosai.
Ethylene Propylene Rubber Gyaran Iri
Tun da EPDM da EPDM roba aka samu nasarar haɓakawa a ƙarshen 1950s da farkon 1960s, nau'ikan roba na ethylene propylene da aka gyara da roba ethylene propylene roba (kamar EPDM/PE) sun bayyana a duniya, don haka samar da faffadan aikace-aikacen roba na ethylene propylene. yana ba da nau'o'in iri da maki masu yawa.Gyaran ethylene-propylene roba ya ƙunshi bromination, chlorination, sulfonation, maleic anhydride, maleic anhydride, gyaran silicone, da gyaran nailan na roba ethylene-propylene.Ethylene-propylene roba kuma ya daskare acrylonitrile, acrylate da sauransu.A cikin shekarun da suka wuce, yawancin kayan polymer tare da kyawawan kaddarorin da aka samu ta hanyar haɗakarwa, copolymerization, cikawa, grafting, ƙarfafawa da haɓaka ƙwayoyin cuta.Ethylene-propylene roba kuma an inganta sosai a cikin aiki ta hanyar gyare-gyare, ta yadda za a fadada aikace-aikacen roba na ethylene-propylene.
Brominated ethylene propylene roba ana sarrafa shi ta hanyar brominating wakili a kan buɗaɗɗen niƙa.Bayan bromination, ethylene-propylene roba na iya inganta saurin vulcanization da aikin mannewa, amma ƙarfin injinsa yana raguwa, don haka roba ethylene-propylene roba ya dace kawai da tsaka-tsakin Layer na ethylene-propylene roba da sauran rubbers.
Chlorinated ethylene propylene roba ana yin ta ta hanyar wucewar iskar chlorine ta hanyar maganin roba na EPDM.Chlorination na roba ethylene-propylene na iya ƙara saurin vulcanization da dacewa tare da sasantawa mara kyau, juriya na harshen wuta, juriya mai, da aikin mannewa kuma an inganta su.
Sulfonated ethylene propylene roba ana yin ta ta hanyar narkar da robar EPDM a cikin wani ƙarfi da kuma magance shi tare da wakili na sulfonating da wakili na tsaka tsaki.Sulfonated ethylene propylene roba za a yi amfani da ko'ina a adhesives, rufaffiyar yadudduka, gina ruwa durƙusad da nama, da kuma anti-lalata rufi saboda da thermoplastic elastomer Properties da kuma mai kyau adhesion Properties.
Acrylonitrile-grafted ethylene-propylene roba yana amfani da toluene a matsayin kaushi da perchlorinated benzyl barasa a matsayin mai ƙaddamarwa don dasa acrylonitrile akan robar ethylene-propylene a 80 ° C.Acrylonitrile-gyara ethylene-propylene roba ba kawai yana riƙe da juriya na lalata ethylene-propylene roba ba, amma kuma yana samun juriyar mai daidai da nitrile-26, kuma yana da mafi kyawun kayan jiki da na inji da kaddarorin sarrafawa.
Thermoplastic ethylene propylene roba (EPDM/PP) dogara ne a kan EPDM roba da polypropylene ga hadawa.A lokaci guda kuma, samfurin ne wanda ke sa robar ethylene-propylene ya kai matakin da ake sa ran na ƙetare.Ba wai kawai yana riƙe da halayen halayen roba na ethylene-propylene ba dangane da aiki, amma har ma yana da aikin fasaha na ban mamaki na allura, extrusion, gyare-gyaren busa da calending na thermoplastics.
2. Ƙananan yawa da babban kayan cikawa
Girman roba na ethylene propylene shine ƙananan roba, kuma yawansa shine 0.87.Bugu da kari, ana iya cika man fetur mai yawa da kuma kara masu, don haka za a iya rage farashin kayayyakin roba, kuma za a iya samar da illar tsadar kudin roba na roba na Ethylene-propylene.Don roba ethylene-propylene tare da ƙimar Mooney mai girma, ana iya rage ƙarfin jiki da na inji bayan babban cikawa.ba babba ba.
3. Juriya na lalata
Saboda rashin polarity da ƙananan digiri na unsaturation na ethylene-propylene roba, yana da kyau juriya ga daban-daban sinadarai na polar irin su alcohols, acids, alkalis, oxidants, refrigerants, detergents, dabba da kayan lambu mai, ketones da fats, da dai sauransu. ;Amma a cikin aliphatic da ƙamshi (kamar man fetur, benzene, da dai sauransu) da rashin kwanciyar hankali a cikin man ma'adinai.Har ila yau, wasan kwaikwayon zai ragu a ƙarƙashin aikin dogon lokaci na mai daɗaɗɗen acid.A cikin TS EN ISO 7620, kusan nau'ikan 400 na iskar gas da sinadarai na ruwa ana tattara su akan kaddarorin rubbers daban-daban, kuma an ƙayyade maki 1-4 don nuna matakin aiki, da tasirin sinadarai masu lalata akan kaddarorin roba:
Ƙimar Girman Girman Matsayi/% Ƙimar rage taurin Tasiri akan aiki
1 <10 <10 kadan ko babu
2 10-20 <20 karami
3 30-60 <30 Matsakaici
4>60>30 mai tsanani
4. Ruwa tururi juriya
Ethylene-propylene roba yana da kyakkyawan juriya na tururin ruwa kuma an kiyasta ya fi ƙarfin zafinsa.A cikin zafi mai zafi a 230 ° C, babu wani canji a bayyanar bayan kusan sa'o'i 100.A karkashin irin wannan yanayi, roba roba, silicone roba, fluorosilicone roba, butyl roba, nitrile roba, da na halitta roba za su fuskanci tabarbarewar bayyanar bayan wani ɗan gajeren lokaci.
5. Juriya ga ruwa mai zafi
Ethylene-propylene roba shima yana da mafi kyawun juriya ga ruwa mai zafi, amma yana da alaƙa da duk tsarin vulcanization.Ethylene-propylene roba tare da dimorpholine disulfide da TMTD kamar yadda tsarin vulcanization yana da ɗan canji a cikin kayan aikin injiniya bayan an jiƙa shi a cikin ruwa mai zafi a 125 ° C na watanni 15, kuma girman girman girman shine kawai 0.3%.
6. Kayan lantarki
Ethylene-propylene robar yana da kyawawan kayan kariya na lantarki da juriya na corona, kuma kayan lantarkinsa sun fi ko kusa da na roba styrene-butadiene, chlorosulfonated polyethylene, polyethylene da polyethylene mai alaƙa.
7. Na roba
Saboda babu wasu abubuwan da ke maye gurbin polar a cikin tsarin kwayoyin halitta na roba na ethylene-propylene, makamashin haɗin gwiwar kwayoyin yana da ƙasa, kuma sarkar kwayoyin na iya kula da sassauci a cikin fadi da kewayo, na biyu kawai ga roba na halitta da roba butadiene, kuma har yanzu yana iya kula da shi. shi a low yanayin zafi.
8. Juriyar tsufa
Ethylene-propylene roba yana da kyakkyawan juriya na yanayi, juriya na ozone, juriya mai zafi, juriya na acid da alkali, juriyar tururin ruwa, kwanciyar hankali launi, kaddarorin lantarki, cika mai da yawan zafin jiki.Ana iya amfani da samfuran roba na Ethylene-propylene na dogon lokaci a 120 ° C, kuma ana iya amfani da su na ɗan lokaci ko na ɗan lokaci a 150-200 ° C.Ƙara mai dacewa anti-tsufa wakili na iya ƙara yawan zafin sabis.Matsayin abinci na EPDM roba tiyo (EPDM hose) mai haɗin gwiwa tare da peroxide ana iya amfani da shi a ƙarƙashin yanayi mai tsauri.A karkashin yanayi na ozone maida hankali na 50pphm da mikewa na 30%, EPDM roba iya isa fiye da 150h ba tare da fatattaka.
Lokacin aikawa: Maris-31-2023