Polymer Engineering and Science · 2011 · 39 citations · 1 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsAcrylic Resin MaterialsCementitious MaterialsConcrete MaterialsHigh-performance PolymersPolymer StabilizationPolymerization Temperature EffectsCement ChemistryCementitious BindersFluid Loss MechanismsInitiator DesignInitiator EfficiencyOptimum TemperatureTemperature Effects On CementingTemperature Optimum
The study aimed to develop a high‑temperature fluid‑loss agent for oil‑well cement by synthesizing a novel terpolymer of 2‑acrylamide‑2‑methylpropanesulfonic acid, acrylamide, and sodium styrene sulfonate. The terpolymer was prepared via free‑radical polymerization of AMPS, AM, and SSS at 40 °C with 0.1 wt % AIBN, and its structure, thermal stability, and fluid‑loss performance up to 160 °C were characterized by FT‑IR, NMR, TGA/DTG, a high‑temperature/high‑pressure water‑loss meter, and a viscometer. The optimized polymer exhibited excellent fluid‑loss control up to 160 °C, decomposed at 350 °C, and prevented flocculation and filter‑cake porosity, indicating its suitability as a high‑temperature fluid‑loss agent. © 2011 Society of Plastics Engineers; 2012 publication.
Abstract A novel terpolymer 2‐acrylamide‐2‐methylpropanesulfonic acid/acrylamide/sodium styrene sulfonate (AMPS/AM/SSS), used as fluid loss agent for oil well cement under high temperature, was prepared with initiator of azobisisobutryamide chloride. The optimum reaction conditions of polymerization were obtained from the orthogonal experiments, reaction temperature 40°C, initiator 0.1 wt%, molar ratio of monomers AMPS/AM/SSS 20/5/1. The structure and performance of terpolymer was characterized with Fourier transform infrared spectrometer, nuclear magnetic resonance hydrogen spectrum, thermogravimetric and simultaneous differential thermal analysis, high‐temperature and high‐pressure water loss meter, and rotational viscometer, indicating that the terpolymer was perfectly synthesized and started to decompose at 350°C and showed good performance of fluid loss control up to 160°C. The ζ‐potential instrument and scanning electron microscopy were used to investigate the mechanisms of fluid loss control, indicating that the terpolymer can prevent the generation of flocculated structure in the cement and reduce the porosity of the filter cake. These results have important referential value for developing new high‐temperature‐resisting fluid loss agents. POLYM. ENG. SCI., 2012. © 2011 Society of Plastics Engineers
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