Txawm hais tias cov roj hmab ntuj muaj qhov muaj txiaj ntsig zoo, cov nplaum nplaum lub zog tsim los ntawm roj hmab ib leeg feem ntau tsis txaus rau ntau daim ntawv thov. Feem ntau cov khoom siv hluavtaws elastomers, qhov sib txawv, tsis muaj tackiness -txawm rau lawv tus kheej lossis lwm qhov chaw. Yog li ntawd, txhawm rau txhim kho lawv cov tack, resin tackifiers yuav tsum tau ntxiv. Ib tug ntau ntawm cov kua roj hmab thiab cov kuab tshuaj-raws li systems-tshwj xeeb yog cov neeg ua hauj lwm raws li kev sib cuag adhesives- yuav tsum tau siv cov hom tshwj xeeb ntawm tackifying resins.
Cov tackifiers feem ntau muaj cov txheeb ze molecular li ntawm 200 txog 1500 thiab feem ntau muaj cov qauv loj, nruj molecular. Lawv yog cov thermoplastic nyob rau hauv cov xwm thiab, nyob rau hauv chav tsev kub, feem ntau muaj nyob rau hauv amorphous glassy solids. Lawv nthuav dav dav ntawm cov ntsiab lus muag muag, xws li cov kua hauv chav tsev kub mus rau nkig, cov khoom tawv tawv nrog cov ntsiab lus melting siab txog li 90 degree. Feem ntau, lawv tau soluble hauv aliphatic hydrocarbons, muaj ntxhiab hydrocarbons, thiab ntau cov organic solvents. Los ntawm cov kev xav ntawm tack, tensile zog, xim tuav, thiab tsis kam mus rau oxidative embrittlement, kev xaiv ntawm tackifying resin ho cuam tshuam rau tag nrho cov zoo ntawm cov nplaum. Cov pos hniav tsis hloov pauv thiab ntoo rosins tuaj yeem hloov mus rau esters; thaum lawv pib nthuav tawm qee qhov tackiness, lawv ua rau pom kev laus tsis zoo thaum daim ntawv thov ua tiav. Rosin esters uas tau ruaj khov los ntawm hydrogenation los yog polymerization, txawm li cas los xij, tiv thaiv oxidative degradation thiab muab cov yam ntxwv zoo tshaj plaws ntawm kev ua haujlwm thaum siv hauv cov tshuaj nplaum.
