Synthesis ntawm polycarboxylate superplasticizer
(1) Polycarboxylic acid superplasticizer tau dhau los ua cov cuab yeej tseem ceeb hauv kev ua lag luam yog tus qauv, vim naphthalene series superplasticizer muaj pes tsawg leeg" formaldehyde", yuav ua rau muaj kev phom sij rau ib puag ncig, thiab superplasticizer yog" ntsuab" thiab qis carbon" hom khoom lag luam, thiab lub tswvyim ntawm kev sib luag niaj hnub thiab kev ua tsov rog hauv ib puag ncig hnoos.
(2) txhawm rau txhim kho thiab coj los ua cov polycarboxylic acid superplasticizer matrix, uas tuaj yeem hloov kho kom haum rau cov khoom sib txawv thiab muaj ntau yam kev xav tau xws li rov qab ua haujlwm, ua kom muaj zog thaum ntxov, thiab lwm yam, kom ntxiv dag zog rau cov kev tshawb fawb ntawm cov polycarboxylic acid superplasticizer thiab lwm yam khoom siv pob zeb ntxiv, yog li raws li kom nce rau hauv daim ntawv thov thiab kev loj hlob ntawm lub superplasticizer.
Polycarboxylic acid dej tso kua dej muaj ib qho" dai" qauv, qauv teeb tsa&tus qauv; qib ntawm kev ywj pheej" yog qhov loj heev, cov saw molecular ntawm cov pab pawg nquag tseem muaj ntau, nws cov kev ua tau zoo, ntau lub zog muaj ntau heev, uas kuj tsis txiav txim siab nws cov kev cia siab zoo.
Nyob rau kaum xyoo dhau los, kev txhim kho zoo heev tau tsim hauv kev tsim, tsim thiab siv cov polyabdominal acid series dej-txo cov neeg ua haujlwm.Because ntawm nws cov qauv, nws tuaj yeem hloov kho thiab rov kho dua los ntawm kev hloov qhov ntev ntawm cov ceg saw, cov neeg ua haujlwm polymerization ntawm cov saw tseem ceeb, thiab muaj pes tsawg leeg ntawm cov pawg ua haujlwm (xws li lub hauv paus thiab sulfonic acid pawg) .Yog li ntawd, ntau cov polymeric acid superplasticizers uas muaj cov yam ntxwv xav tau lossis cov haujlwm tau tsim thiab tsim.Qhov kev ua haujlwm dej-txo cov neeg ua haujlwm tseem ceeb rau kev tsim khoom thiab kev thov kev ua vaj tse.
