1.Application scope
(1). Inoshandiswa kune unsaturated rabha: senge NR, BR, NBR, IR, SBR, nezvimwe.
(2). Nyorera kune rabha rakazara: senge EPM inogona kungoitwa vulcanized neperoxide, EPDM inogona kupiswa neperoxide nesarufa.
(3). Inoshandiswa kune zvakasiyana-siyana cheni rabha: senge Q vulcanization.
2. Hunhu hweperoxide vulcanization system
(1). Iyo netiweki chimiro che vulcanized rabha ndeye CC bond, ine yakakwirira bond simba, yakakwira makemikari kugadzikana, uye yakanakisa kuramba kupisa uye oksijeni kuchembera.
(2). Vulcanized rabha ine yakaderera zvachose deformation, yakanaka elasticity uye kushomeka kwekuita.
(3). Yakashata kugadzirisa kuchengetedzwa uye inodhura peroxide.
(4). Mukuisa chisimbiso kana kupisa kwakanyanya static sealing zvigadzirwa zvine huwandu hwakasiyana hwekushandisa.
3. Peroxides inowanzoshandiswa
Peroxide vulcanizing agents anowanzo shandiswa alkyl peroxides, diacyl peroxides (dibenzoyl peroxide (BPO)) uye peroxy esters. Pakati pavo, dialkyl peroxides inoshandiswa zvakanyanya. Zvakadai se: diisopropyl peroxide (DCP): parizvino ndiyo inonyanya kushandiswa vulcanizing agent.
2,5-dimethyl-2,5-(di-tert-butylperoxy) hexane: inozivikanwawo sebis-dipentyl
4. Peroxide vulcanization mechanism
Boka reperoxide reperoxide rinonyungudika zviri nyore nekupisa kuti riburitse mahara radicals, izvo zvinokonzeresa iyo free radical type cross-linking reaction yerabha molecular chain.
5. Mapoinzi akakosha eperoxide vulcanization:
(1). Dosage: inosiyana nemhando dzakasiyana dzerabha
Muchinjika-kubatanidza kushanda zvakanaka kweperoxide: 1g molekuru yeorganic peroxide inogona kugadzira magiramu mangani emamorekuru erabha anogadzira kemikari inoyambuka.
Semuyenzaniso: kuchinjika-kubatanidza kushanda kweSBR ndeye 12.5; iyo cross-linking performance yeBR ndeye 10.5; kuchinjika kwekubatanidza kweEPDM, NBR, NR ndeye 1; iyo muchinjika-inobatanidza kushanda kweIIR ndeye 0.
(2). Kushandiswa kweanoshanda agent uye co-sulfurizing agent kuvandudza muchinjika-wekubatanidza kushanda zvakanaka
Basa reZnO nderekuvandudza kupisa kwekudzivirira kwekunamatira, kwete iyo activator. Basa re stearic acid nderekuvandudza kunyungudika uye kupararira kweZnO murabha. HVA-2 (N,N'-phthalimido-dimaleimide) inoshandawo kushandisa peroxide.
Kuwedzera anobatsira vulcanizing agent: kunyanya sarufa yero, uye mamwe anobatsira muchinjiko-anobatanidza maajenti akadai se divinylbenzene, trialkyltricyanate, unsaturated carboxylates, nezvimwe.
(3). Wedzera zvishoma zvealkaline zvinhu, zvakadai seMgO, triethanolamine, nezvimwewo, kuti uvandudze kushanda kwemuchinjikwa, kudzivisa kushandiswa kwekabhoni kabhoni dema uye silica uye mamwe acidic fillers (asidhi kuita mahara radicals passivation); antioxidants anowanzo amine uye phenolic antioxidants, zvakare nyore kuita emahara radicals passivation, kuderedza kushanda kwemuchinjiko-kubatanidza, inofanira kushandiswa zvishoma.
(4). Tembiricha yeVulcanization: inofanirwa kunge yakakwira kupfuura tembiricha yekuora yeperoxide
(5). Vulcanization nguva: kazhinji 6 ~ 10 nguva dzehafu yehupenyu hweperoxide.
Peroxide hafu yehupenyu: pane imwe tembiricha, iyo peroxide kuora kusvika hafu yepakutanga yenguva inodiwa, inoratidzwa mu t1/2.
Kana iyo hafu yehupenyu hweDCP pa170 ℃ iri 1min, saka iyo yakanaka sulfation nguva inofanira kunge iri 6 ~ 10min.
Muenzaniso wekugadzira: EPDM 100 (base)
S 0.2 (mubatsiri vulcanizing mumiririri)
SA 0.5 (activator)
ZnO 5.0 (kuvandudza kupisa kupisa)
HAF 50 (inosimbisa mumiririri)
DCP 3.0 (Thixotropic agent)
MgO 2.0 (Inovandudza kuyambuka-kubatanidza kushanda zvakanaka)
Operating oil 10 (softening agent)
