Hauv Kev Lag Luam Admixture, Xws li Polycarboxylate Superplasticizer, Puas yog "formulation" Cov Tub Ntxhais Kev Sib Tw?

Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm superplasticizer hauv pob zeb?

Ib zaug yog, tam sim no tsis yog raws nraim. Polycarboxylic acid ntau lawm txoj kev kom deb li deb, kuv xav tias nws tau dhau los ntawm peb theem ntawm esterification, synthesis ob feem txoj kev, kub kub hluavtaws ether, chav tsev kub ether. Nyob rau hauv thawj ob theem ntawm cov mis tseem tseem ceeb dua. Yog vim li cas yog tias cov txheej txheem esterification synthesis yog cumbersome, hnyav ntau lawm. Xav tau cov cua kub cua sov, cov txheej txheem kev lag luam thiab cov xwm txheej ntau lawm yog qhov yuav tsum tau ua. Tom qab ntawd, qhov ntau lawm ntawm allyl polyethylene glycol, polycarboxylic acid ntau lawm kauj ruam ntawm ob mus rau ib qho. Nws yuav tsum tau hais tias tus qauv tseem tseem ceeb dua nyob rau theem no. Cov txheej txheem ntau lawm tseem yuav tsum tau cua sov. Cov txheej txheem ntau lawm tau ceev faj dua. Cov mis tsis ruaj khov tshwj xeeb, thiab kev sib tw ua lag luam tsis yog hnyav li tam sim no. Polycarboxylic acid tseem encroach ntawm naphthalene system, aliphatic lag luam. Vim tias qhov zoo ntawm kev nyob hauv qhov chaw siab, cov tuam txhab carboxylic acid nyob rau lub sijhawm no tseem muaj kev noj qab haus huv. Nrog rau kev taw qhia ntawm redox system rau hauv cov txheej txheem polycarboxylic acid synthesis, qhov ntau lawm tsis tas yuav tsum tau siv cov khoom cua sov. Raws li qhov tshwm sim, qhov pib tsim tau txo qis heev, thiab qee cov neeg tau pom cov txiaj ntsig thiab pib hloov cov tshuab carboxylic acid synthesis. Muaj ntau manufacturers nyob rau hauv lub lag luam ib zaug. Kev sib tw rau homogeneity tam sim ntawd intensified. Cov mis tsis yog qhov tseem ceeb ntxiv lawm. Tam sim no, cov chaw tsim khoom ntawm polycarboxylic acid cov khoom lag luam kev sib tw tau dhau los ua qhov hnyav dua. Yog li cov mis tsis zoo li qub

Sau: Tindal
Txuas: https://www.zhihu.com/question/51988294/answer/135084924
Source: Kev Paub
Copyright belongs rau tus sau. Rau kev luam tawm ua lag luam, thov hu rau tus kws sau ntawv kom tso cai, thiab rau cov ntawv luam tawm tsis yog lag luam, thov muab credit rau qhov credit.