1.Qhov khoom siv tau
(1). Siv rau cov roj hmab uas tsis muaj roj: xws li NRN, BR, NPR, IR, SBR, thiab lwm yam.
(2). Siv rau cov roj hmab saturated: xws li Epm tsuas yog ua kom muaj vulcanized los ntawm peroxide los ntawm peroxide los ntawm peroxide, epdm tuaj yeem ua kom muaj kev vircanized los ntawm ob qho tib si peroxide thiab leej faj.
(3). Ua ntawv thov rau lwm cov roj hmab roj hmab: xws li Q Vulcanization.
2. Cov yam ntxwv ntawm Peroxide Vulcanization System
(1). Lub network qauv ntawm cov roj hmab vepcanized yog CC Bond, muaj lub zog siab rau lub zog, thiab tshuaj tsis txaus ntseeg rau cua sov thiab cov pa oxygen.
(2). Cov roj hmab vulcanized roj hmab tau qis tsis zoo deformation, zoo elasticity thiab tsis zoo kev ua tau zoo.
(3). Kev ua tsis zoo thiab kim peroxide.
(4). Nyob rau hauv lub qub kev sib khi lossis qhov kub siab zoo li kub cov khoom lag luam muaj ntau cov kev siv.
3.Cov xwm siv tau ua Peroxides
Feem ntau siv peroxide vulcanizing cov neeg sawv cev yog alkyl peroxides, diacyl peroxides (dibenzoyl peroxide (bpo)) thiab peroxy esters. Ntawm lawv, Dialkyl peroxides yog siv dav. Xws li: Diisoproyl peroxide (DCP): Tam sim no yog qhov siv tau cov neeg sawv cev ua kom vulcanizing.
2,5-dimethyl-2,5- (di-tert-butylperoxy) hexane: tseem hu ua kab mob bis-dipentyl
4. Peroxide Vulcanization Mechanism
Cov pab pawg peroxide ntawm peroxide yog yooj yim decomposed los ntawm tshav kub los tsim dawb radicals, uas ua rau cov tshuaj tiv thaiv dawb hla ntawm cov roj hmab molecular.
5. Cov ntsiab lus tseem ceeb ntawm peroxide vulcanization:
(1). Kev Dosage: Sib txawv nrog cov hom roj hmab sib txawv
Hla kev sib txuas ntawm peroxide ntawm peroxide ntawm cov organic peroxules tsim cov tshuaj hla kev sib txuas nrog cov roj hmab hla-txuas, kev sib txuas ntawm kev sib txuas, kev sib txuas ntawm kev sib txuas yog 1.
Piv txwv li: Kev sib txuas hla kev sib txuas ntawm SBR yog 12.5; Kev sib txuas hla kev ua haujlwm ntawm Br yog 10.5; Kev sib txuas ntawm kev sib txuas ntawm EPDM, NBR, NR yog 1; Kev sib txuas ntawm kev sib txuas ntawm IIR yog 0.
(2). Siv tus neeg saib xyuas nquag thiab cov neeg sawv cev sib txuas los txhim kho kev sib txuas ntawm kev sib txuas
Lub luag haujlwm ntawm ZNO yog txhawm rau txhim kho cov cua sov tsis kam ntawm cov nplaum, tsis yog cov activator. Lub luag haujlwm ntawm stearic acid yog los txhim kho cov solubility thiab dispersion ntawm zno hauv cov roj hmab. HVA-2 (N, n'-phthalimido-dimaleimide) kuj yog tus ua kom muaj txiaj ntsig ntawm peroxide.
Ntxiv ib qho kev ua kom zoo nkauj pulcanizing: feem ntau yog sulfur daj, thiab lwm yam ib pab cuam tshuam-txuas cov nom tswv xws li tradinylwbenanate, trudeaturricanate, unsaturated carboxylates, thiab lwm yam.
(3). Ntxiv ib qho me me ntawm cov tshuaj alkaline me me, xws li MGO, tsis txhob txhim kho cov pa roj carbon thiab silica thiab lwm yam acidic fillers (acid kom dawb radicals passivation); Antioxidants feem ntau yog amine thiab phenolic antioxidants, kuj yooj yim kom muaj kev ua tau zoo ntawm kev sib txuas, yuav tsum tau siv sparingly.
(4). Vulcanization kub: yuav tsum siab dua qhov kev txiav txim siab kub ntawm peroxide
(5). Lub sij hawm vulcanization: feem ntau 6 ~ 10 zaug ntawm ib nrab-lub neej ntawm peroxide.
Peroxide ib nrab-lub neej: ntawm qhov kub thiab txias, lub peroxide decomposition rau ib nrab ntawm tus thawj concentration ntawm lub sij hawm xav tau, qhia hauv T1 / 2.
Yog tias lub neej ib nrab-lub neej ntawm DCP ntawm 170 ℃ yog 1min, ces nws txoj kev sulphation lub sijhawm yuav tsum 6 ~ 10min.
Daim Qauv Qauv Piv Txwv: EPDM 100 (puag)
S 0.2 (ib tus neeg sawv cev ntuav tawm)
Sa 0.5 (Activator)
Zno 5.0 (txhawm rau txhim kho cov cua kub tiv taus)
Haf 50 (txhawb tus neeg sawv cev)
DCP 3.0 (thixotropic tus neeg sawv cev)
MGO 2.0 (txhim kho kev sib txuas sib txuas ua ke)
Kev Ua Haujlwm Roj 10 (Muag Rau Tus Neeg Sawv Cev)
