Abstract. This paper focuses on the synthesis of a kind of VPEG polycarboxylate
superplasticizer with controllable activity with 4-hydroxybutyl vinyl polyoxyethylene ether
(VPEG), acrylic acid (AA) and fumaric acid (FMA) as the main raw materials. Through the
experimental results, it can be found that the optimum process conditions are as follows: the
water-reducing admixture has ideal fluidity and workability in concrete, with the temperature
of 20℃, the reaction system concentration of 40%, the mass ratio of acid to ether of 9.2%, and
the initiator and the chain-transfer agent respectively accounting 0.3% and 0.09% of the total
mass.
superplasticizer with controllable activity with 4-hydroxybutyl vinyl polyoxyethylene ether
(VPEG), acrylic acid (AA) and fumaric acid (FMA) as the main raw materials. Through the
experimental results, it can be found that the optimum process conditions are as follows: the
water-reducing admixture has ideal fluidity and workability in concrete, with the temperature
of 20℃, the reaction system concentration of 40%, the mass ratio of acid to ether of 9.2%, and
the initiator and the chain-transfer agent respectively accounting 0.3% and 0.09% of the total
mass.