Dab tsi yog iav-hloov kub (Tg) ntawm redispersible polymer hmoov?

Lub iav-hloov kub (Tg) ntawm redispersible polymer hmoov tuaj yeem sib txawv nyob ntawm seb cov polymer muaj pes tsawg leeg thiab kev tsim. Redispersible polymer hmoov feem ntau yog tsim los ntawm ntau yam polymers, xws li ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), polyvinyl cawv (PVA), acrylics, thiab lwm yam. Txhua lub polymer muaj nws tus kheej tshwj xeeb Tg, uas yog qhov kub thiab txias ntawm lub polymer hloov ntawm lub iav los yog lub xeev nruj mus rau lub xeev rubbery lossis viscous.

Lub Tg ntawm redispersible polymer hmoov yog cuam tshuam los ntawm yam xws li:

1. Polymer Composition: Cov polymers sib txawv muaj qhov sib txawv Tg. Piv txwv li, EVA feem ntau muaj Tg thaj tsam ntawm -40 ° C txog -20 ° C, thaum VAE yuav muaj Tg thaj tsam ntawm -15 ° C txog 5 ° C.
2. Additives: Kev suav nrog cov additives, xws li plasticizers lossis tackifiers, tuaj yeem cuam tshuam rau Tg ntawm redispersible polymer hmoov. Cov tshuaj ntxiv no tuaj yeem txo Tg thiab txhim kho kev yooj yim lossis adhesion zog.
3. Particle Loj thiab Morphology: Qhov loj me thiab morphology ntawm redispersible polymer hmoov kuj tuaj yeem cuam tshuam lawv Tg. Cov khoom me me tuaj yeem pom cov khoom thermal sib txawv piv rau cov khoom loj dua.
4. Kev Tsim Khoom: Cov txheej txheem tsim khoom siv los tsim cov khoom siv rov ua dua tshiab, suav nrog cov txheej txheem ziab thiab cov txheej txheem tom qab kho, tuaj yeem cuam tshuam Tg ntawm cov khoom kawg.

Vim yog cov xwm txheej no, tsis muaj ib qho Tg tus nqi rau tag nrho cov respersible polymer hmoov. Hloov chaw, cov tuam txhab feem ntau muab cov lus qhia tshwj xeeb thiab cov ntaub ntawv kev tshaj lij uas suav nrog cov ntaub ntawv hais txog cov khoom siv polymer, Tg ntau yam, thiab lwm yam khoom siv ntawm lawv cov khoom. Cov neeg siv ntawm cov khoom siv rov ua dua tshiab polymer yuav tsum sab laj cov ntaub ntawv no rau qhov tshwj xeeb Tg qhov tseem ceeb thiab lwm cov ntaub ntawv tseem ceeb ntsig txog lawv daim ntawv thov.