1.Application ƒe lolome
(1) . Wozãnɛ ɖe rababa si me mekɔ o ŋu: abe NR, BR, NBR, IR, SBR, kple bubuawo ene.
(2) . Zãe ɖe rababa si me wode nuɖuɖui ŋu: abe EPM ene la, peroxide koe woate ŋu awɔ vulcanized, EPDM ateŋu anye vulcanized to peroxide kple sulphur siaa dzi.
(3) . Wozãnɛ ɖe kɔsɔkɔsɔ ƒe rababa vovovowo ŋu: abe Q vulcanization ene.
2. Peroxide vulcanization ɖoɖoa ƒe nɔnɔmewo
(1) . Rababa si wotsɔ vulcanized wɔe ƒe network ƒe wɔwɔme nye CC bond, si me kadodo ƒe ŋusẽ geɖe le, atikewo ƒe li ke nyuie, eye wòte ŋu nɔa te ɖe dzoxɔxɔ kple oxygen ƒe tsitsi nu nyuie ŋutɔ.
(2) . Vulcanized rababa ƒe deformation si nɔa anyi ɖaa le sue, elasticity nyui kple ŋusẽ ƒe dɔwɔwɔ nyuie o.
(3) . Dedienɔnɔ madeamedzi le dɔwɔwɔ ŋu kple peroxide xɔasi.
(4) . Le static sealing alo dzoxɔxɔ gã static sealing nuwɔnawo ƒe dɔwɔwɔ le mɔ vovovowo nu.
3.Peroxide siwo wozãna zi geɖe
Peroxide vulcanizing agents siwo wozãna zi geɖe enye alkyl peroxides, diacyl peroxides (dibenzoyl peroxide (BPO)) kple peroxy esters. Le wo dome la, wozãa dialkyl peroxides geɖe. Abe: diisopropyl peroxide (DCP): ye nye nusi wozãna wu fifia le vulcanizing agent.
2,5-dimethyl-2,5-(di-tert-butylperoxy) hexane: wogayɔna be bis-dipentyl
4. Peroxide ƒe vulcanization ƒe mɔnu
Peroxide ƒe peroxide ƒuƒoƒoa gblẽna bɔbɔe to dzoxɔxɔ me be wòawɔ free radicals, si hea free radical type cross-linking reaction si le rababa molecule chain me vɛ.
5. Nu vevi siwo ku ɖe peroxide ƒe vulcanization ŋu:
(1) . Agbɔsɔsɔme: toa vovo le rababa ƒomevi vovovowo nu
Peroxide ƒe cross-linking efficiency: 1g molecule of organic peroxide ateŋu ana rubber molecule gram neni nawɔ chemical cross-linking.Ne peroxide molecule 1 ateŋu ana 1g molecules of rubber cross-linked la, cross-linking efficiency nye 1.
Le kpɔɖeŋu me: SBR ƒe cross-linking ƒe dɔwɔwɔ nyuie nye 12.5; BR ƒe cross-linking ƒe dɔwɔwɔ nyuie nye 10.5; EPDM, NBR, NR ƒe cross-linking ƒe dɔwɔwɔ nyuie nye 1; IIR ƒe cross-linking ƒe dɔwɔwɔ nyuie nye 0.
(2) . Active agent kple co-sulfurizing agent zazã be woatsɔ ana cross-linking ƒe dɔwɔwɔ nanyo ɖe edzi
Dɔ si ZnO wɔnae nye be wòana dzoxɔxɔ si le nusi léna ɖe nu ŋu la nanyo ɖe edzi, ke menye nusi wɔa dɔ la o. Dɔ si stearic acid wɔnae nye be wòana ZnO ƒe ʋeʋẽ kple kaka ɖe rababa me nanyo ɖe edzi. HVA-2 (N,N’-phthalimido-dimaleimide) hã nye peroxide ƒe dɔwɔwɔ nyuie.
Kpekpeɖeŋunu si naa vulcanizing kpena ɖe eŋu: vevietɔ sulfur yellow, kple kpeɖeŋutɔ bubu siwo ƒoa ƒu ɖe wo nɔewo ŋu abe divinylbenzene, trialkyltricyanate, unsaturated carboxylates, kple bubuawo.
(3) . Tsɔ nu sue aɖe si me alkaline le, abe MgO, triethanolamine, kple bubuawo ene kpe ɖe eŋu, be wòana cross-linking ƒe dɔwɔwɔ nanyo ɖe edzi, aƒo asa na slot carbon black kple silica kple acidic fillers bubuwo zazã (acid to make free radicals passivation); antioxidants nye amine kple phenolic antioxidants, siwo hã le bɔbɔe be woawɔ free radicals pasivation, si ɖea cross-linking ƒe dɔwɔwɔ nyuie dzi kpɔtɔna, ele be woazãe le mɔ si mesɔ gbɔ o nu.
(4) . Vulcanization ƒe dzoxɔxɔ: ele be wòakɔ wu peroxide ƒe gbegblẽ ƒe dzoxɔxɔ
(5) . Vulcanization ɣeyiɣi: zi geɖe la, peroxide ƒe afã ƒe agbenɔƒe ƒe teƒe 6 ~ 10.
Peroxide ƒe afã ƒe agbenɔƒe: le dzoxɔxɔ aɖe me la, peroxide ƒe gbegblẽ va ɖoa ɣeyiɣi si hiã ƒe agbɔsɔsɔ gbãtɔ ƒe afã, si woɖena fiana le t1/2 me.
Ne DCP ƒe afã ƒe agbenɔƒe le 170°C nye 1min la, ekema ele be eƒe sulphation ɣeyiɣi nyuitɔ nanye 6~10min.
Atikewɔwɔ ƒe kpɔɖeŋu: EPDM 100 (gɔmeɖoanyi) .
S 0.2 (kpekpeɖeŋunu si naa vulcanizing) .
SA 0.5 (nuwɔna si wɔa dɔ) .
ZnO 5.0 (be dzoxɔxɔ ƒe tsitretsitsi nanyo ɖe edzi) .
HAF 50 (nu si doa ŋusẽ ame) .
DCP 3.0 (Thixotropic atike) .
MgO 2.0 (Enaa cross-linking ƒe dɔwɔwɔ nyona ɖe edzi)
Ami si wotsɔ wɔa dɔe 10 (nu fafɛ) .
