Hom tsuj nrawm no yog rho tawm ntawm 2-thiol benzothiazole. Hais txog nws cov qauv tshuaj, nws kuj yuav tsum yog thiazole accelerator, tab sis nws tau tsim kho sai vim nws qhov tshwj xeeb ntawm kev ua haujlwm. Hom kev nrawm no tuav txoj haujlwm tseem ceeb hauv kev ntsuas nrawm. Qhov no yog vim muaj kev siv ntau hauv cov tshuaj pleev hluavtaws, thiab cov khoom siv nrawm nrog kev ua haujlwm zoo yog qhov tshwj xeeb.
Lub sulfenamide accelerator yog npaj los ntawm oxidative hws ntawm cov sib xyaw ammonium ntsev ntawm 2-thiol benzothiazole (M) los ntawm cov tshuaj tiv thaiv ntawm accelerator M thiab N-chloramine. Lub sijhawm scorch thiab vulcanization ceev ntawm cov roj hmab txuas ntxiv nrog cov sib txawv sulfenamide accelerator nyob ntawm qhov xwm ntawm amine nyob rau hauv cov ntsuas nrawm (xws li alkalinity thiab steric effect) thiab cov nitrogen hauv sulfenamide txiav txim siab los ntawm nws. -Lub zog ntawm cov leej faj nyiaj muaj feem xyuam. Feem ntau hais lus, qhov muaj zog ntau dhau los ntawm alkaline ntawm amine, sai dua li tus nqi vulcanization. Nrog qhov nce ntawm cov tsis tseem ceeb ua kom tsis haum los ntawm amine pab pawg, lub sijhawm scorch yog lub sijhawm ntev, tab sis qhov kev txwv vulcanization tsawg dua.
Cov roj hmab vulcanized ua nrog sulfenamide accelerators muaj qhov siab ntawm vulcanization thiab lub cev thiab lub cev zoo heev, nrog rau qhov sib npaug ntawm lub cev muaj zog thiab muaj cov laus ua hauj, thiab cov roj hmab compound tsis yooj yim rau oversulfur. Qhov nce ntawm tus tsuj roj muaj qhov cuam tshuam me me ntawm kev ua yeeb yam scorch ntawm cov roj hmab sib txuas, tab sis nws tuaj yeem nce qib ntawm vulcanization thiab luv tag nrho lub sijhawm vulcanization. Yog tias qhov nyiaj ntawm vulcanization nce ntxiv, txawm hais tias tag nrho lub sijhawm vulcanization tuaj yeem raug txo qis thiab qhov degree ntawm vulcanization tuaj yeem raug nce ntxiv, qhov scorch tsis kam. Thaum tus nqi ntawm leej faj yog qhov tsawg heev, tus nqi ntawm cov tsuj roj yuav tsum tau nce ntxiv. Txhawm rau kom tag nrho cov khoom siv ua kom nrawm ua kom tsawg ntawm qhov ntsuas qis, dithiocarbamate lossis thiuram tuaj yeem siv los ua qhov ntsuas nrawm thib ob. Qhov qes-sulfur vulcanizate muaj qhov zoo tshaj plaws compression teeb, hysteresis thiab kev laus tiv taus, thiab yog vulcanized. Ob qhov txo qis thiab kev tsim ua cua sov yog qhov me me, thiab tam sim no nws tau ntau thiab dav siv. Thaum lub cev nqus dej ntawm vulcanization muab ntxiv nrog kev loj dua ceev dhau los ua qhov ntsuas ceev thib ob, qhov kev ntxhov siab tensile ntawm vulcanizate tuaj yeem txhim kho ntau ntxiv.
Hauv qis-leej faj lossis tsis yog leej faj thiuram vulcanization, sulfenamide accelerator feem ntau siv los ncua vulcanization, nce qib ntawm vulcanization thiab tiv thaiv thiuram ejection. Vim tias ntxiv ntawm sulfenamide, qhov nyiaj ntawm thiuram kuj tuaj yeem txo kom tsawg.
Txawm hais tias nws zoo dua rau kev sib xyaw nrog sulfenamide accelerator nrog cov khoom siv roj hmab siab dua nws cov taw tes melting, nws tsis pom zoo kom ua kom qhov kub siab dhau lossis siv cov txheej txheem kub dhau, tsis li ntawd lub tshuab nrawm yuav ploj thiab poob kev nyab xeeb kev ua haujlwm.
Noo noo tuaj yeem maj mam rhuav tshem cov sulfenamide accelerator, thiab cov dej kub tuaj yeem ua kom qeeb ntawm qhov txiav txim siab. Yog li no, qhov tshwm sim sai sai ntawm cov roj hmab sib txuas hauv cov pwm tsis muaj qhov txhab ua kua vulcanization yog qhov ceev heev, thiab tsis muaj qhov cuam tshuam txog kev cuam tshuam txog vulcanization. Tshwj xeeb tshaj yog thaum siv ua ke nrog zinc dithiocarbamate lossis thiuram accelerator, nws tuaj yeem siv rau kev ua paug tsis tu ncua hauv chav. Hauv qhov xwm txheej no, qhov nrawm nrawm nrawm yog tus ntsuas nrawm CZ thiab AZ, tom qab ntawd yog tus tsuj roj NOBS, thiab qhov qeeb tshaj yog tus tsuj roj DZ.
Tam sim no, cov khoom siv hluav taws xob sulfenamide feem ntau siv CZ, NOBS, NS, DZ, thiab lwm yam.