Dab tsi yog cov macromonomers siv hauv Kev Tsim Cov Polycarboxylate Superplasticizers?
Mar 12, 2022
Dab tsi yog cov macromonomers siv hauv kev tsim cov polycarboxylate superplasticizers?
HPEG, TPEG, APEG, MPEG.
Muag: macromonomer: HPEG--TPEG; dej txo tus neeg sawv cev niam cawv (aliphatic / polycarboxylic acid) acrylic acid, mercaptoethyl, mercaptopropane, VC, hydrogen peroxide; sodium sulfite 75-80; 85-90; 93, formaldehyde; sodium gluconate, citric acid, cua nkag mus rau tus neeg sawv cev.
Kev ua haujlwm ob npaug ntawm cov monomer yog siab, thiab copolymerization saw kev loj hlob cov tshuaj tiv thaiv yog yooj yim dua los nqa tawm, uas tuaj yeem txo lub sij hawm poob ntawm acrylic acid. Lub monomer tuaj yeem hnov qab los ntawm ib lub lauj kaub, thiab cov dej npaj tau ntxiv rau cov tshuaj tiv thaiv ib zaug, thiab cov tshuaj tiv thaiv tuaj yeem ua tiav los ntawm nplawm rau 30 ~ 40min. Qhov kev ua tau zoo ntawm cov dej synthesized txo tus neeg sawv cev kuj zoo heev, uas tuaj yeem ua kom yooj yim rau cov dej polycarboxylate txo tus neeg sawv cev. txheej txheem ntau lawm.
Qhov zoo thiab qhov tsis zoo
Nyob rau hauv ntau qhov kev ua vaj tse, cov tsoos ua haujlwm siab zoo xws li naphthalene series ntau dua thiab tsis tuaj yeem ua tau raws li qhov xav tau ntawm engineering vim muaj kev txwv ntawm kev ua haujlwm. Ib tiam tshiab ntawm cov dej-txo tus neeg saib xyuas, polycarboxylate-raws li kev ua haujlwm siab dej-txo tus neeg saib xyuas, uas tau nyiam ntau yam nyob hauv tsev thiab txawv teb chaws, tau tsim tiag tiag cov qauv molecular zoo raws li cov txheej txheem ntawm dispersing cement;
Nws muaj ib hom super-dispersed, uas tuaj yeem tiv thaiv qhov poob ntawm pob zeb tawg yam tsis ua kom pom tseeb retardation. Nws muaj cov nyhuv plasticizing siab nyob rau hauv tsawg npaum li cas, thiab muaj qhov zoo fluidity tuav, thiab muaj ib tug loj degree ntawm kev ywj pheej nyob rau hauv adapting mus rau ib tug dav molecular qauv. , Muaj ntau chav rau kev ua haujlwm siab, thiab nws muaj qhov tseem ceeb ntawm cov khoom siv ntxiv rau cov pob zeb, tuaj yeem txo cov pob zeb shrinkage, thiab muaj cov ntsiab lus tsis tshua muaj teeb meem thiab lwm yam kev ua haujlwm zoo.