Study on the performance of solid polycarboxylate superplasticizer synthesized by bulk polymerization
TAO Jun
NI Tao
XIA Liangliang
LIU Zhaoyang
WANG Jinchun
Abstract：With acrylic acid and 501 ether macromonomer as main raw materials,the solid polycarboxylate superplasticizers were prepared utilizing the method of bulk polymerization and initiated by AIBN.The effect of the temperature,molar ratio of acid and ether,initiator dosage,chain transfer agent dosage,drop-time and the mode of adding initiator on the performance of the products and analyzed the reasons.The experimental results showed that the product,under the polymerization conditions:the temperature was 65 ℃,the molar ratio of acid and ether was 4∶1,the dosage of the initiator was 0.4％ based on the mass of the macro monomers,the dosage of the chain transfer agent was 0.5％ based on the mass of the macro monomers,the drop-time was 2 h and the initiator was added in one time equally,performed excellent disperse ability and disperse-maintaining ability,when the dosage of the product was 0.14％ of cement mass,the initial fluidity of cement paste was 280 mm and 285 mm after 120min.The effect of the dosage of product,which synthesized under the optimum polymerization conditions,was investigated by infrared spectroscopic analysis,it was found that the polymerization reaction of the acrylic acid and 501 macro monomer was carried out successfully,the product was target product.
Keywords：bulk polymerizationsolid polycarboxylate superplasticizersdisperse abilitydisperse-maintaining ability
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 20-24 )