Izinto zerabha eziqhelekileyo——uphawu lwe-EPDM

Izinto zerabha eziqhelekileyo——uphawu lwe-EPDM

Inzuzo:
Ukumelana nokwaluphala okuhle kakhulu, ukumelana nemozulu, ubushushu bombane, ukumelana nokugqwala kweekhemikhali kunye nokuqina kwempembelelo.

Iingxaki:
Isantya sokucotha esicothayo; Kunzima ukuxuba nezinye iirabha ezingagcwaliyo, kwaye ukuzincamathela kunye nokunamathelana kwazo kuphantsi kakhulu, ngoko ke ukusebenza kokucutshungulwa kuphantsi.

I-Ningbo Yokey Automotive Parts Co., Ltd igxile ekusombululeni iingxaki zezinto zerabha zabathengi kunye nokuyila iindlela ezahlukeneyo zezinto ezisetyenzisiweyo ngokusekelwe kwiimeko ezahlukeneyo zokusetyenziswa.

Iipropati: iinkcukacha
1. Uxinano oluphantsi kunye nokuzaliswa okuphezulu
Irabha ye-ethylene propylene luhlobo lwerabha enobunzima obuphantsi be-0.87. Ukongeza, inani elikhulu leoyile lingazaliswa kwaye kongezwe izizalisi, nto leyo enokunciphisa iindleko zeemveliso zerabha kwaye ihlawule ixabiso eliphezulu lerabha eluhlaza yerabha ye-ethylene propylene. Ukongeza, kwirabha ye-ethylene propylene enexabiso eliphezulu leMooney, amandla omzimba kunye nawoomatshini emva kokuzaliswa okuphezulu awayi kuncitshiswa kakhulu.

2. Ukumelana nokwaluphala
Irabha ye-ethylene propylene inokumelana okuhle kakhulu nemozulu, ukumelana ne-ozone, ukumelana nobushushu, ukumelana ne-asidi kunye ne-alkali, ukumelana nomphunga wamanzi, ukuzinza kombala, ukusebenza kombane, ukuzaliswa kweoyile kunye nokugeleza kobushushu begumbi. Iimveliso zerabha ye-ethylene propylene zingasetyenziswa ixesha elide kwi-120 ℃, kwaye zingasetyenziswa okwethutyana okanye ngamaxesha athile kwi-150 - 200 ℃. Ubushushu bokusetyenziswa bunokwandiswa ngokongeza i-antioxidant efanelekileyo. I-EPDM edityaniswe ne-peroxide ingasetyenziswa phantsi kweemeko ezinzima. Xa uxinzelelo lwe-EPDM lwe-ozone luyi-50 pphm kwaye ixesha lokunwebeka liyi-30%, i-EPDM inokufikelela kwiiyure ezili-150 ngaphandle kokuqhekeka.

3. Ukumelana nokugqwala
Ngenxa yokungabikho kwe-polarity kunye nokungagcwali kakuhle kwerabha ye-ethylene propylene, inokumelana okuhle neekhemikhali ezahlukeneyo ze-polar ezifana notywala, i-asidi, i-alkali, i-oxidant, i-refrigerant, isepha, ioyile yezilwanyana kunye nemifuno, i-ketone kunye ne-grease; Nangona kunjalo, ayinazinzo zininzi kwi-fatty kunye ne-aromatic solvents (ezifana nepetroli, i-benzene, njl.njl.) kunye neeoyile zeminerali. Ukusebenza kwayo kuya kuncipha phantsi kwesenzo sexesha elide se-concentrated acid. Kwi-ISO/TO 7620, idatha malunga nemiphumo yeekhemikhali zegesi ezirhabaxa eziphantse zibe yi-400 kwiipropati zeerabha ezahlukeneyo iyaqokelelwa, kwaye iigreyidi ezi-1-4 zichaziwe ukubonisa iziphumo zazo. Iziphumo zeekhemikhali ezirhabaxa kwiipropati zeerabha zezi zilandelayo:

Impembelelo yokunciphisa ukuqina kweqondo lomthamo/% kwizakhiwo
1<10<10 Kancinci okanye akukho nto
2 10-20<20 ezincinci
3 30-60<30 Phakathi
4>60>30 nzulu

4. Ukumelana nomphunga wamanzi
I-EPDM inokumelana okuhle kakhulu nomphunga kwaye kuqikelelwa ukuba ingcono kunokumelana kwayo nobushushu. Kwi-230 ℃ eshushu kakhulu, imbonakalo ayitshintshi emva kweeyure eziphantse zibe yi-100. Nangona kunjalo, phantsi kweemeko ezifanayo, imbonakalo yerabha ye-fluorine, irabha ye-silicon, irabha ye-fluorosilicone, irabha ye-butyl, irabha ye-nitrile kunye nerabha yendalo yonakele kakhulu ngexesha elifutshane.

5. Ukumelana namanzi ashushu kakhulu
Irabha ye-ethylene propylene nayo inokumelana kakuhle namanzi ashushu kakhulu, kodwa inxulumene kakhulu nazo zonke iinkqubo ze-vulcanization. Iimpawu zoomatshini zerabha ye-ethylene propylene (EPR) evulcanized nge-dimorphine disulfide kunye ne-TMTD azitshintshanga kangako emva kokuntywiliselwa emanzini ashushu kakhulu kwi-125 ℃ kangangeenyanga ezili-15, kwaye izinga lokwandiswa komthamo yayiyi-0.3% kuphela.

6. Ukusebenza kombane
Irabha ye-ethylene propylene inobushushu obuhle bombane kunye nokumelana ne-corona, kwaye iipropati zayo zombane ziphezulu okanye zisondele kwezo zerabha ye-styrene butadiene, i-polyethylene e-chlorosulfonated, i-polyethylene kunye ne-polyethylene edibeneyo.

7. Ukuqina
Ngenxa yokuba irabha ye-ethylene propylene ayinazo izinto ezithatha indawo ye-polar kwisakhiwo sayo se-molecular kunye namandla aphantsi okubambisana kwe-molecular, ikhonkco layo le-molecular linokugcina ukuguquguquka kuluhlu olubanzi, lilandela irabha yendalo kunye nerabha ye-cis polybutadiene, kwaye lisenokuhlala likwiqondo lobushushu eliphantsi.

8. Ukunamathela
Ngenxa yokungabikho kwamaqela asebenzayo kwisakhiwo semolekyuli yerabha ye-ethylene propylene, amandla okubambisana aphantsi, kwaye irabha kulula ukuyitshiza, ngoko ke ukuzincamathela kunye nokunamathelana akukuhle kakhulu.