Keeb kwm ntawm roj hmab curing:
Vulcanization yog cov txheej txheem yooj yim ntawm kev npaj cov roj hmab vulcanized los ntawm kev sib txuas ntawm cov roj hmab nyoos molecules los tsim peb-dimensional network qauv. Cov tshuab vulcanization sib txawv yog tsim rau cov pos hniav sib txawv. Nrog roj hmab (raws li roj hmab) raws li lub cev tseem ceeb, mus rau ntau yam ntawm cov khoom pab thiab cov synthesis ntawm lub cev, (cov ntaub ntawv pab muaj ob peb lub cev loj, filling reinforcing, sulfide, tiv thaiv, koom tus neeg sawv cev, plasticizing, tshwj xeeb khoom) thiab sulfide yog coated insulating txheej los yog sheath txheej txheej txheem, nws lub hom phiaj yog cia lub vulcanization system ntawm auxiliary system, ua rau cov roj hmab mus tas li cross-linking, nce elasticity, txo plasticity. Lub sij hawm vulcanization yog vim lub sijhawm ntxov tshaj plaws yog siv cov sulfur los ua cov roj hmab sib txuas, yog li hu ua vulcanization, siv niaj hnub no.
Lub ntsiab lus ntawm roj hmab curing:
Lo lus "kho txheej txheem" feem ntau yog siv nyob rau hauv tag nrho cov roj hmab kev lag luam, uas yog ib qho tseem ceeb nyob rau hauv cov roj hmab chemistry. Roj hmab vulcanization yog los ntawm cov tshuaj crosslinking ntawm cov roj hmab molecules yuav pib cov roj hmab yas rau hauv elastic thiab loj cov khoom ruaj khov, vulcanized roj hmab lub cev stability, kev siv kub ntau los nthuav. Lub interchain vulcanization (cross-linking) muaj peev xwm ntawm roj hmab molecules nyob ntawm nws cov qauv. Unsaturated diene roj hmab (xws li roj hmab ntuj, styrene butadiene roj hmab thiab nitrile roj hmab, thiab lwm yam) muaj unsaturated ob daim ntawv cog lus nyob rau hauv cov saw molecular, uas muaj peev xwm tsim intermolecular cross-linking sulfur, phenolic resin thiab organic peroxide los ntawm kev hloov los yog ntxiv cov tshuaj tiv thaiv. Cov roj hmab saturated feem ntau cuam tshuam los ntawm cov dawb radicals (xws li cov organic peroxides) thiab hluav taws xob hluav taws xob siab. Cov roj hmab uas muaj cov pab pawg ua haujlwm tshwj xeeb (xws li chlorosulfonated polyethylene, thiab lwm yam) tuaj yeem cuam tshuam los ntawm kev cuam tshuam tshwj xeeb ntawm ntau pawg ua haujlwm thiab tsim cov tshuaj. Piv txwv li, sulfonamide pawg hauv cov roj hmab tuaj yeem sib txuas los ntawm cov tshuaj tiv thaiv nrog hlau oxides thiab amines.
Txoj cai ntawm kev kho roj hmab:
Roj hmab ua mos thaum rhuab, nyuaj thaum txias, nkig, tsis yooj yim rau daim ntawv, yooj yim hnav, yooj yim rau yaj hauv cov organic solvents xws li roj av, nrog ob daim ntawv cog lus hauv cov molecule, yooj yim ntxiv cov tshuaj tiv thaiv, yooj yim rau kev laus.
Txhawm rau txhim kho kev ua haujlwm ntawm cov khoom siv roj hmab, kev tsim khoom yuav tsum tau ua cov roj hmab nyoos, nyob rau hauv qee qhov xwm txheej, ua kom cov roj hmab nyoos thiab cov roj hmab vulcanizing tus neeg sawv cev tsim cov tshuaj tiv thaiv, ua rau nws los ntawm cov qauv linear ntawm macromolecular crosslinking los ua ib qho Peb-dimensional reticular qauv ntawm cov loj molecules, yog li ntawd cov khoom siv roj hmab nrog lub zog siab, siab elasticity, siab hnav tsis kam, corrosion kuj, thiab lwm yam khoom zoo heev. Cov txheej txheem no hu ua vulcanization ntawm roj hmab.
Feem ntau, cov txheej txheem vulcanization tau muab faib ua plaub theem, induction - pre-sulfur - zoo sulfide - sulfur. Yuav kom ua tiav cov tshuaj tiv thaiv no, lub zog ntxiv yuav tsum tau siv los ua kom nws ncav cuag qhov kub thiab txias, thiab tom qab ntawd cia cov roj hmab rwb thaiv tsev nyob rau hauv qhov kub thiab txias ntau yam kom tiav tag nrho cov tshuaj tiv thaiv kho.
