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采用偏光显微镜、扫描电镜、傅里叶红外光谱、高温凝胶渗透色谱、差示扫描量热、力学测试等手段,研究了煤基均聚聚丙烯1102K及对比牌号的结晶形态、断口形貌、等规度、摩尔质量及摩尔质量分布及其他基本物理性能等。结果表明,煤基均聚聚丙烯1102K与对比样品相比,1102K球晶尺寸较小,分布较均匀,摩尔质量分布最窄,有利于纺丝;三种样品断口形貌均呈现脆性断裂特征,力学性能基本相近,三者内部结构基本一致。综合分析,煤基均聚聚丙烯1102K与其对比牌号样品的结构与基本物理性能没有明显差异。
The microstructure and fracture morphology of coal-based homopolypropylene (1102K) and its comparative grades were studied by means of polarizing microscope, scanning electron microscopy, Fourier transform infrared spectroscopy, high temperature gel permeation chromatography, differential scanning calorimetry and mechanical testing. Isotacticity, molar mass and molar mass distribution, and other basic physical properties. The results show that 1102K coal-based homopolypropylene has smaller spherulites, more uniform distribution and narrower molar mass distribution, which is beneficial to spinning. The fracture morphology of the three samples shows brittle fracture, Mechanical properties are similar, the three internal structure is basically the same. Based on the comprehensive analysis, there is no obvious difference between the structure and the basic physical properties of coal-based homopolymer polypropylene 1102K and its comparative grade.