Qhov no yog chav kawm tseem ceeb heev ntawm cov tsuj nrawm, uas suav nrog thiuram monosulfide, thiuram disulfide thiab thiuram polysulfide. Txij li cov thiuram disulfide thiab thiuram polysulfide tso cov leej faj ua haujlwm ntawm tus qauv vulcanization kub, lawv kuj tuaj yeem siv los ua tus neeg sawv cev ntawm vulcanizing, yog li cov roj hmab tuaj yeem vulcanized yam tsis ntxiv leej faj. Qhov no yog qhov sib hu" pub dawb sulfur vulcanization", feem ntau Nws yog hu ua" tsis muaj leej faj txo lub cev" ;.
Raws li qhov ua kom nrawm, qhov kev ua ntawm cov tshuaj no yog nyob nruab nrab ntawm dithiocarbamates thiab thiazoles, tab sis lawv tseem yog tus tsuj roj super. Feem ntau, qhov kub thiab txias vulcanization ntawm cov roj hmab sib txuas ntxiv yuav tsum tsis txhob siab tshaj 125-135 ℃, txhawm rau kom tau txais qhov dav dav vulcanization flatness thiab txo qhov kev pheej hmoo ntawm tshaj-leej faj. Ob-fluidized thiuram tsawg-leej faj lossis sulfur-dawb vulcanized compound muaj qhov dav dav vulcanization flatness, thiab tuaj yeem hais lus vulcanized ntawm qhov kub tsis sib xws, thiab muaj peev xwm txawm muaj vulcanized nrog lub siab ua pa lossis ntsev ntsev.
Tus tsuj roj M thiab cov tshuaj tiv thaiv kab mob MB muaj qhov cuam tshuam rau kev ua haujlwm ntawm thiuram, thaum ua kom cov alkaline accelerator thiab dithiocarbamate tuaj yeem nce nws cov dej num ntau dua. Thiuram feem ntau yog siv los ua qhov nrawm thib ob, nws muaj qhov cuam tshuam me ntsis ntawm lub vulcanization ntawm dithiocarbamate, thiab tuaj yeem siv los ua kom qhov vulcanization ceev ntawm thiazole thiab sulfenamide accelerator. Thaum siv los ntawm kev sib xyaw nrog sulfenamide accelerator, qhov pib ntawm vulcanization ntawm cov roj hmab compound tuaj yeem ncua thaum xub thawj, thiab tom qab ntawd qhov vulcanization tau nrawm nrawm heev, thiab qhov ceev ceev ntawm vulcanized roj hmab kuj nce siab. Qhov kev sib xyaw ua ke no yog qhov tshwj xeeb tshaj yog muaj qis-leej faj ua kua vulcanization.
Lub cev nqaij daim tawv thiab lub zog thiab cov laus ua kom muaj zog ntawm vulcanizates ua nrog thiuram li cov nrawm nrawm nyob ntawm tus piv ntawm tsub kom mus rau leej faj ntau npaum. Feem ntau hais lus, cov roj hmab vulcanized nrog lub cev vulcanization ntau npaum li cas muaj kev ntxhov siab ntau dua thiab kev ua kom lub cev thiab lub zog zoo heev. Yog tias qhov ntsuas kub ntawm vulcanization tsis dhau, nws qhov kev laus ua haujlwm zoo dua. Thaum tus nqi ntawm thiuram siab thiab tus nqi ntawm cov leej faj yog tsawg, cov laus tiv tshav kub cov roj hmab vulcanized tuaj yeem hloov kho. Cov kua qaub qis cov ntsiab lus los yog leej ntshiab vulcanizates muaj qhov zoo dua qub hysteresis thiab compression deformation, kev tsim ua kom muaj cua sov tsawg dua, muaj kev cuam tshuam tsawg dua ntawm vulcanization, thiab zoo heev thaum tshav kub kub ua hauj. Txawm li cas los xij, qhov tsis muaj leej faj txog vulcanizate muaj qhov tsawg tsawg ntawm kev rho tawm vulcanization. Yog tias koj xav tau kom muaj qhov kev ntxhov siab ntau ntxiv, ib qho me me ntawm cov leej faj yog feem ntau ntxiv.
Thaum thiuram disulfide siv los ua tus neeg sawv cev vulcanizing, nws cov tetramethyl derivative feem ntau yog siv, vim tias cov phaus molecular ntawm tetraethylthiuram disulfide, tshwj xeeb tshaj yog cov qib thib ob-dimethyl diphenylthiuram, yog cov feem ntau, yog li cov koob tshuaj yuav tsum tau nce ntxiv. Tsis tas li ntawd, qhov vulcanization nrawm qeeb, thiab nws feem ntau tsis siv rau qhov tsis muaj leej faj. Txawm li cas los xij, thaum lawv siv nrog kev sib xyaw nrog tetramethylthiuram disulfide, qhov ua rau paj tawg ntawm qhov kawg tuaj yeem raug txo kom tsawg.
Thaum thiuram tetrasulfide siv rau qhov tsis muaj leej faj vulcanization, nws cov khoom zoo ib yam li thiuram disulfide thiab me me ntawm cov leej faj. Lub vulcanization pib sai thiab kub kev ua haujlwm ntawm cov roj hmab vulcanized txo, tab sis cov compression deformation yog qhov zoo dua li thiuram disulfide. Cov leej faj-dawb vulcanizate. Qhov tseeb, thiuram tetrasulfide tuaj yeem suav tau tias yog hom thauj khoom ntawm leej faj.
Thiuram accelerator tuaj yeem siv los ua tus neeg sawv cev tiv thaiv scorch hauv neoprene roj hmab nrog zinc oxide-thiourea accelerator raws li qhov ua tsis muaj zog. Lub sij hawm scorch ntawm cov roj hmab compound yog ntev thiab qhov degree ntawm vulcanization yog qhov tsawg.