Chemistry Program, Department of Natural and Exact Sciences, San Pablo Campus, University of Cartagena, Cartagena 30015, Colombia.
Chemical Engineering Program, School of Engineering, Universidad Tecnológica de Bolivar, Parque Industrial y Tecnológico Carlos Vélez Pombo, Km 1 Vía Turbaco, Turbaco 130001, Colombia.
Int J Mol Sci. 2022 Oct 12;23(20):12148. doi: 10.3390/ijms232012148.
During the production of polymer-grade propylene, different processes are used to purify this compound and ensure that it is of the highest quality. However, some impurities such as acetylene and methyl acetylene are difficult to remove, and some of these impurities may be present in the propylene used to obtain polypropylene, which may have repercussions on the process. This study evaluates the impact of these acetylene and methyl acetylene impurities on the productivity of the polypropylene synthesis process and on the mechanical and thermal properties of the material obtained through the synthesis of eight samples with different concentrations of acetylene and eight samples with different concentrations of acetylene. We discovered that for the first concentrations of both acetylene (2 and 3 ppm) and methyl acetylene (0.03 and 0.1), the MFI, thermal recording, and mechanical properties of the resin were unaffected by the variation of the fluidity index, thermal degradation by TGA, and mechanical properties such as resistance to tension, bending, and impact. However, when the concentration exceeded 14 ppm for methyl acetylene and 12 ppm for acetylene, the resistance of this resin began to decrease linearly. Regarding production, this was affected by the first traces of acetylene and methyl acetylene progressively decreasing.
在生产聚合级丙烯的过程中，使用不同的工艺来纯化这种化合物，以确保其具有最高的质量。然而，一些杂质，如乙炔和甲基乙炔，很难去除，而且这些杂质中的一些可能存在于用于获得聚丙烯的丙烯中，这可能会对工艺产生影响。本研究评估了这些乙炔和甲基乙炔杂质对聚丙烯合成过程生产力的影响，以及对通过合成 8 个不同乙炔浓度的样品和 8 个不同甲基乙炔浓度的样品获得的材料的机械和热性能的影响。我们发现，对于乙炔（2 和 3 ppm）和甲基乙炔（0.03 和 0.1）的第一浓度，树脂的 MFI、热记录和机械性能不受流动性指数变化、TGA 热降解以及拉伸、弯曲和冲击强度等机械性能的影响。然而，当甲基乙炔的浓度超过 14 ppm，乙炔的浓度超过 12 ppm时，这种树脂的阻力开始线性下降。关于生产，这受到乙炔和甲基乙炔的第一痕迹的影响，这些痕迹逐渐减少。
