Qhov tseeb, peroxide curing system - feem ntau siv Organic peroxides crosslinking tus neeg sawv cev; Txawm hais tias Organic peroxides haum raws li tus neeg sawv cev crosslinking nyob ntawm ib nrab-lub neej ntawm Organic peroxides thiab hom dawb radicals tsim los ntawm kev puas tsuaj. Vim qhov kev txwv ntawm cov roj hmab ua kub thiab vulcanization kub, ib nrab-lub neej ntawm Organic peroxides raws li tus neeg sawv cev crosslinking yuav tsum nyob rau hauv qhov tsim nyog. Uas yog hais tias, ib nrab-lub neej yuav tsum tsis txhob luv luv kom tsis txhob coking thaum lub sij hawm sib tov. Ib nrab-lub neej yuav tsum tsis txhob ntev dhau los kom tsis txhob kub vulcanization los yog lub sij hawm ntev vulcanization. Qhov thib ob, cov dawb radicals tsim tom qab decomposition yuav tsum muaj siab reactivity, xws li alkoxy pawg, thiab siab formability: cov efficiency ntawm crosslinking agents.
Nyob rau hauv cov nqe lus ntawm hom, alkyl peroxides feem ntau yog siv los ua tus neeg sawv cev sib txuas Organic peroxides, thiab ketal thiab diacyl peroxides kuj tseem siv.
1. Dialkyl peroxide; Dialkyl peroxides feem ntau muaj kev sib txuas ua haujlwm siab thiab yuav tsum tau ua kom sov siab dua. Feem ntau dialkyl peroxides yog dicumyl peroxide, bis (tert butylperoxyisopropyl) benzene, thiab 2, 5-dimethyl-2, 5-bis (tert butylperoxyisopropyl) hexane ethane.
Dicumyl peroxide, tseem hu ua DCP, yog kev noj txhua xyoo ntawm Organic peroxides. Qhov zoo ntawm DCP yog kev sib txuas ua haujlwm siab, tus nqi qis, thiab tus nqi kom zoo dua. Lub ntsiab drawback yog cov khoom vulcanized muaj ib tug muaj zog pungent tsw. Lub hauv paus ntawm tsw yog cov khoom decomposition ntawm DCP Acetophenone.
2. Peroxyketal; Piv nrog rau dialkyl peroxides, ketal peroxides feem ntau pib crosslinking ntawm qhov kub thiab txias thiab feem ntau siv rau hauv cov khoom uas yuav tsum tau kub-kub crosslinking.
Di-tert-butyl peroxide -3,3,5-trimethylcyclohexane; Di-tert-butyl peroxide -3,3,5-trimethylcyclohexane yog ib hom oxidative ketal crosslinking tus neeg sawv cev, feem ntau hu ua 3M. Cov yam ntxwv ntawm no peroxide yog nws qhov kub tsis tshua muaj vulcanization, uas yog qhov tsim nyog rau cov xwm txheej uas yuav tsum muaj qhov kub thiab txias vulcanization. Lub ntsiab drawback yog tias vulcanization efficiency yog me ntsis tsawg, tshwj xeeb tshaj yog nyob rau hauv cov roj hmab saturated, yog li qhov ntau npaum li cas yog loj heev; Thiab muaj qhov sib txawv ntawm kev kub hnyiab.
3. Diacyl peroxide; Piv nrog rau dialkyl peroxides, diacyl peroxides muaj ib qho tseem ceeb coking nyiam, ua rau nws nyuaj rau ua tau raws li cov kev cai ntawm feem ntau cov roj hmab, thiab cov generated dawb radical kev ua si kuj tsawg thiab tsis muaj zog. diacyl peroxides tau yooj yim cuam tshuam los ntawm carbon dub, ua diacyl peroxides tsuas yog siv rau crosslinking ntawm silicone roj hmab.