Cov tshuaj auxiliary yog cov khoom siv me me los txhim kho cov khoom thiab kev ua haujlwm ntawm lwm cov tshuaj. Lawv feem ntau ntxiv rau cov tshuaj lom neeg tseem ceeb los txhim kho nws txoj kev ruaj ntseg, solubility, reactivity, los yog lwm yam khoom ntawm lub cev thiab tshuaj. Cov tshuaj pab tau siv dav hauv ntau yam lag luam, suav nrog tshuaj, tshuaj pleev ib ce, zaub mov, kev ua liaj ua teb, thiab ntau lwm yam.
Ib lub luag haujlwm tseem ceeb tshaj plaws ntawm cov tshuaj auxiliary yog ua kom muaj txiaj ntsig ntawm cov tshuaj tseem ceeb. Qhov no tuaj yeem ua tiav los ntawm kev muab ib puag ncig zoo dua rau cov tshuaj tiv thaiv kab mob tshwm sim, lossis los ntawm kev tiv thaiv cov kev xav tsis zoo. Piv txwv li, ib qho catalyst yog ib qho khoom siv tshuaj uas ua rau cov tshuaj tiv thaiv kab mob nrawm dua, ua rau cov tshuaj tiv thaiv tshwm sim sai dua thiab ua tau zoo. Ib yam li ntawd, cov stabilizers yog cov tshuaj pabcuam uas tiv thaiv cov tshuaj lom neeg los ntawm kev degrading dhau sijhawm, ua rau lawv lub neej txee.
Lwm txoj haujlwm tseem ceeb ntawm cov tshuaj pabcuam yog txhawm rau txhim kho kev tuav thiab khaws cia ntawm cov tshuaj tseem ceeb. Ntau cov tshuaj tuaj yeem ua rau muaj kev phom sij lossis tsis ruaj khov hauv lawv daim ntawv ntshiab, yuav tsum tau ceev faj tuav thiab khaws cia. Cov tshuaj pabcuam tuaj yeem siv los ua kom cov tshuaj tseem ceeb ruaj khov, yooj yim los tuav, lossis tsis muaj tshuaj lom. Piv txwv li, surfactants yog cov tshuaj pabcuam uas feem ntau ntxiv rau cov tshuaj ntxuav kom txo tau qhov nro thiab txhim kho lawv cov kev tu kom huv.
Cov tshuaj pabcuam kuj tseem ua lub luag haujlwm tseem ceeb hauv kev tsim cov thev naus laus zis tshiab thiab cov khoom lag luam. Lawv tuaj yeem siv los hloov kho cov ntaub ntawv thiab cov khoom uas twb muaj lawm, lossis tsim cov tshiab tag nrho. Piv txwv li, cov ntaub ntawv polymeric, uas yog siv nyob rau hauv ntau yam kev lag luam xws li automotive thiab aerospace, feem ntau yog tsim los ntawm kev siv tshuaj auxiliary xws li catalysts thiab pib.
Zuag qhia tag nrho, auxiliary chemicals yog cov khoom tseem ceeb ntawm ntau cov txheej txheem tshuaj thiab cov khoom. Lawv pab txhim kho cov khoom thiab kev ua haujlwm ntawm cov tshuaj, ua rau lawv muaj txiaj ntsig zoo, ua haujlwm zoo, thiab nyab xeeb. Raws li cov thev naus laus zis tshiab thiab cov khoom lag luam tseem tab tom tshwm sim, lub luag haujlwm ntawm cov tshuaj auxiliary tej zaum yuav dhau los ua qhov tseem ceeb tshaj yav tom ntej.