Author：Kevin
Polyether polyols based on CO ₂ are of great significance in carbon capture and utilization technology, providing innovative pathways for reducing greenhouse gas emissions and endowing polymer materials with higher added value. Joon Hyun Baik’s team from Soo Ming Women’s University in South Korea synthesized CO ₂ based polyether polyols through bimetallic cyanide (DMC) catalysts, and discussed their application performance in rigid polyurethane foam (RPUFs). To overcome the technical bottleneck in the traditional CO ₂ introduction process, two new initiators were studied and evaluated: propoxylated pentaerythritol (PE-PO) and ethoxylated pentaerythritol (PE-EO). DMC catalyst was successfully synthesized using tetrahydrofurfuryl alcohol (THFA) as a chelating agent. Among the tested initiators, PE-PO showed the best catalytic efficiency, achieving a CO ₂ doping rate of 20.4 mol% under the condition of a monomer to initiator molar ratio of 50. The prepared CO ₂ – based polyether polyol was successfully used in the preparation of RPUFs, and the resulting foam materials showed excellent mechanical properties, uniform and dense cell structure, and good thermal stability. The improvement in its mechanical properties is attributed to the increase in the content of carbonate bonds in the polymer backbone, which enhances intermolecular forces and improves the structural integrity of the material. This phenomenon has been verified by FT-IR spectra and compression testing.
This method not only significantly improves material properties, but also promotes the sustainable development of polymer materials by replacing traditional petroleum based polyols. This study proposes a new strategy of introducing CO ₂ into polyether polyols, providing a new direction for the green synthesis of high-performance RPUFs. The research results indicate that the new initiator and DMC catalytic system have the potential to break through the limitations of existing technologies, marking an important progress in the development of environmentally friendly polymer materials.
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