Preparation of a high‐temperature‐resistant lightening agent and its application in a cement slurry system

ABSTRACT With an organic–inorganic polymer lightening material (EL) based on epoxy resin and an aromatic amine curing agent, through addition reaction, we synthesized an epoxy‐cured resin coupled with an inorganic activation filler, microsilicon. First, epoxy resin bisphenol A 2‐glycidyl ether (E‐51) and the curing agent, m‐phenylenediamine, were selected as the materials for the epoxy‐curing system. The thermal stability of the epoxy‐cured compound (EM) was studied by differential scanning calorimetry and thermogravimetric analysis. The glass‐transition temperature (T g) of EM reached 131 °C, and the results show that T g and the thermal stability was raised when EM was kept at 150 °C for 12 h. Second, the inorganic active filler was modified with a titanate coupling agent and characterized by contact angle measurement and Fourier transform infrared spectroscopy, and the results show that the titanate coupling agent was successfully applied to the modification of the inorganic active filler. Finally, the performance of EL in a cement slurry system was also studied. The macroscopic data showed that the compressive strength of the cement stone increased from 8.6 MPa for the EM cement stone system to 13.2 MPa for the EL cement stone system. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 136, 47292. Schematic diagram of interaction between titanate coupling agent with micro‐silicon and epoxy resin.