1.Kuchuluka kwa ntchito
(1). Amagwiritsidwa ntchito ku mphira wopanda unsaturated: monga NR, BR, NBR, IR, SBR, etc.
(2). Ikani pa mphira wodzaza: monga EPM imatha kutenthedwa ndi peroxide, EPDM ikhoza kutenthedwa ndi peroxide ndi sulfure.
(3). Amagwiritsidwa ntchito pamitundu yosiyanasiyana ya rabara: monga Q vulcanization.
2. Makhalidwe a peroxide vulcanization dongosolo
(1). Kapangidwe ka netiweki ka rabara wovunda ndi CC chomangira, chokhala ndi mphamvu zambiri zomangira, kukhazikika kwamankhwala, komanso kukana kwambiri kukalamba kwamafuta ndi okosijeni.
(2). Rabara yopangidwa ndi vulcanized imakhala ndi mapindikidwe otsika okhazikika, kukhazikika bwino komanso kusachita bwino kwambiri.
(3). Osauka processing chitetezo ndi mtengo peroxide.
(4). Mu static kusindikiza kapena kutentha kwambiri static kusindikiza mankhwala ali ndi ntchito zosiyanasiyana.
3.Ma peroxides omwe amagwiritsidwa ntchito kwambiri
Zomwe zimagwiritsidwa ntchito kwambiri ndi peroxide vulcanizing ndi alkyl peroxides, diacyl peroxides (dibenzoyl peroxide (BPO)) ndi peroxy esters. Pakati pawo, dialkyl peroxides amagwiritsidwa ntchito kwambiri. Monga: diisopropyl peroxide (DCP): yomwe imagwiritsidwa ntchito kwambiri pakali pano.
2,5-dimethyl-2,5-(di-tert-butylperoxy) hexane: imadziwikanso kuti bis-dipentyl
4. Peroxide vulcanization limagwirira
Gulu la peroxide la peroxide limawola mosavuta ndi kutentha kuti lipange ma free radicals, omwe amayambitsa mawonekedwe amtundu waufulu wolumikizana ndi ma cell a mphira.
5. Mfundo zazikuluzikulu za peroxide vulcanization:
(1). Mlingo: umasiyana ndi mitundu yosiyanasiyana ya rabala
Kugwira ntchito bwino kwa peroxide: 1g molekyulu ya organic peroxide imatha kupanga magilamu angati a mamolekyu arabala kupanga mankhwala olumikizana.
Mwachitsanzo: kugwiritsa ntchito bwino kwa SBR ndi 12.5; mphamvu yolumikizirana ya BR ndi 10.5; Kugwira ntchito bwino kwa EPDM, NBR, NR ndi 1; Kugwira ntchito bwino kwa IIR ndi 0.
(2). Kugwiritsiridwa ntchito kwa sulfurizing ndi co-sulfurizing agent kuti apititse patsogolo kugwirizanitsa bwino
Ntchito ya ZnO ndikuwongolera kutentha kwa zomatira, osati choyambitsa. Ntchito ya stearic acid ndikuwongolera kusungunuka ndi kubalalitsidwa kwa ZnO mu rabala. HVA-2 (N,N'-phthalimido-dimaleimide) imagwiranso ntchito poyambitsa peroxide.
Kuonjezera wothandizira vulcanizing wothandizira: makamaka sulfure yellow, ndi zina zothandizira mtanda zolumikizira monga divinylbenzene, trialkyltricyanate, unsaturated carboxylates, etc.
(3). Onjezerani pang'ono zinthu zamchere, monga MgO, triethanolamine, ndi zina zotero, kuti mupititse patsogolo kugwirizanitsa, pewani kugwiritsa ntchito kagawo kakang'ono ka kaboni wakuda ndi silika ndi ena acidic fillers (acid kuti apange free radicals passivation); Ma antioxidants nthawi zambiri amakhala amine ndi phenolic antioxidants, komanso osavuta kupanga ma free radicals passivation, kuchepetsa mphamvu yolumikizirana, iyenera kugwiritsidwa ntchito mochepera.
(4). Kutentha kwa Vulcanization: kuyenera kukhala kwakukulu kuposa kutentha kwa peroxide
(5). Nthawi ya Vulcanization: Nthawi zambiri 6-10 nthawi ya theka la moyo wa peroxide.
Peroxide theka la moyo: pa kutentha kwina, kuwonongeka kwa peroxide mpaka theka la nthawi yokwanira yofunikira, yomwe ikuwonetsedwa mu t1/2.
Ngati theka la moyo wa DCP pa 170 ℃ ndi 1min, ndiye kuti nthawi yake yabwino ya sulphation iyenera kukhala 6 ~ 10min.
Chitsanzo chokonzekera: EPDM 100 (base)
S 0.2 (wothandizira vulcanizing)
SA 0.5 (choyambitsa)
ZnO 5.0 (kupititsa patsogolo kukana kutentha)
HAF 50 (wothandizira)
DCP 3.0 (Thixotropic agent)
MgO 2.0 (Imakulitsa luso lolumikizirana)
Mafuta opangira 10 (othandizira)
