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Preparation and performance of a lignosulfonate–AMPS–itaconic acid graft copolymer as retarder for modified phosphoaluminate cement
Highlights A new type of lignosulfonate-based graft copolymer OLSAI was studied by single factor analysis and orthogonal experiment. The OLSAI has good retarding ability, thermal-resistant properties and little impact on the strength of MPC. The comprehensive evaluation indicates that the OLSAI will enable MPC to be applied to high-CO2 oil-well cementing.
Abstract In this article, a new type of graft copolymer retarder as modified phosphoaluminate cement (MPC) has been discussed. Graft copolymerization of 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and itaconic acid (IA) onto sodium lignosulfonate (LS) was performed using potassium persulfate as an initiator by free radical aqueous solution copolymerization. The optimal LS/AMPS/IA copolymer (OLSAI) was obtained under the optimum reaction conditions: mass ratio of LS/(AMPS+IA)=1:1, temperature=60°C, mole ratio of AMPS/IA=9:1, initiator concentration=1%, pH value=5. The synthesized copolymer OLSAI was characterized by FTIR analysis. The experimental results demonstrate that the OLSAI has excellent retarding ability, dispersing power, thermal-resistant and pressure-tolerant properties, and little negative impact on the compressive strength of MPC. The graft copolymer OLSAI is expected to be an excellent retarder for MPC.
Preparation and performance of a lignosulfonate–AMPS–itaconic acid graft copolymer as retarder for modified phosphoaluminate cement
Highlights A new type of lignosulfonate-based graft copolymer OLSAI was studied by single factor analysis and orthogonal experiment. The OLSAI has good retarding ability, thermal-resistant properties and little impact on the strength of MPC. The comprehensive evaluation indicates that the OLSAI will enable MPC to be applied to high-CO2 oil-well cementing.
Abstract In this article, a new type of graft copolymer retarder as modified phosphoaluminate cement (MPC) has been discussed. Graft copolymerization of 2-acrylamido-2-methyl propane sulfonic acid (AMPS) and itaconic acid (IA) onto sodium lignosulfonate (LS) was performed using potassium persulfate as an initiator by free radical aqueous solution copolymerization. The optimal LS/AMPS/IA copolymer (OLSAI) was obtained under the optimum reaction conditions: mass ratio of LS/(AMPS+IA)=1:1, temperature=60°C, mole ratio of AMPS/IA=9:1, initiator concentration=1%, pH value=5. The synthesized copolymer OLSAI was characterized by FTIR analysis. The experimental results demonstrate that the OLSAI has excellent retarding ability, dispersing power, thermal-resistant and pressure-tolerant properties, and little negative impact on the compressive strength of MPC. The graft copolymer OLSAI is expected to be an excellent retarder for MPC.
Preparation and performance of a lignosulfonate–AMPS–itaconic acid graft copolymer as retarder for modified phosphoaluminate cement
Ma, Cong (Autor:in) / Bu, Yuhuan (Autor:in) / Chen, Bing (Autor:in)
Construction and Building Materials ; 60 ; 25-32
25.02.2014
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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