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Facile Room-Temperature Preparation of Flexible PolyurethaneFoams from Carbon Dioxide Based Poly(ether carbonate) Polyols witha Reduced Generation of Acetaldehyde

机译:室温下方便地制备柔性聚氨酯二氧化碳基聚醚碳酸酯多元醇与乙醛生成减少

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摘要

Carbon dioxide (CO2) is becoming more attractive as a renewable feedstock for chemical synthesis. In this study, CO2 was incorporated into poly(ether carbonate) (PEC) polyols by using a double-metal-cyanide catalyst. By adjusting the CO2 pressure, the content of propylene carbonate units in the PEC polyols was controlled, indicating successful and semiquantitative incorporation of CO2 into the PEC polyols. Polyurethane foams (PUFs) with different propylene carbonate content were easily prepared at room temperature by employing the PEC polyols due to their adequate viscosity under ambient conditions. The firmness of the PUFs increased as the amount of propylene carbonate units increased due to the rigidity of the carbonate linkage, representing predictable mechanical properties. Interestingly, reduced generation of volatile organic compounds (VOCs) from the PUFs, namely acetaldehyde, was observed with a high content of propylene carbonate units at 120 °C, indicating good stability of the carbonate units against thermo-oxidative decomposition. This study demonstrates the importance of CO2 as an environmental-friendly and renewable resource that can provide not only industrially importantbut also problem-solving products in terms of processability and lowgeneration of VOCs.
机译:作为化学合成的可再生原料,二氧化碳(CO2)越来越有吸引力。在这项研究中,通过使用双金属氰化物催化剂将CO2掺入聚醚碳酸酯(PEC)多元醇中。通过调节CO 2压力,控制了PEC多元醇中碳酸亚丙酯单元的含量,表明成功且半定量地将CO 2引入PEC多元醇中。由于在环境条件下具有足够的粘度,因此通过使用PEC多元醇在室温下很容易制备出具有不同碳酸亚丙酯含量的聚氨酯泡沫(PUF)。由于碳酸酯键的刚性,PUF的硬度随着碳酸亚丙酯单元数量的增加而增加,这代表了可预测的机械性能。有趣的是,在120°C时,由于碳酸亚丙酯单元的含量高,观察到PUF中挥发性有机化合物(VOC)的生成减少,即乙醛,表明碳酸酯单元对热氧化分解具有良好的稳定性。这项研究证明了二氧化碳作为一种环境友好和可再生资源的重要性,它不仅可以提供工业上重要的以及解决问题的产品的可加工性和低VOC的产生。

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