Maciejewska Małgorzata, Gawdzik Barbara, Rogulska Magdalena
Department of Polymer Chemistry, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University in Lublin, Gliniana 33, 20-614 Lublin, Poland.
Materials (Basel). 2021 Apr 27;14(9):2240. doi: 10.3390/ma14092240.
In this study, the synthesis and characterization of permanently porous polymeric microspheres was presented. The microspheres were obtained via suspension polymerization using diverse functional monomers, such as 4,4'-bis(methacryloyloxymethylphenyl)sulphone, 1,4-bis(methacryloyloxymethyl)benzene, 4,4'-bis(methacryloyloxymethylphenyl)methane, -vinylpyrrolidone, ethylene glycol dimethacrylate, and divinylbenzene as a co-monomer. As porogenic solvents, toluene and chlorobenzene were applied. The main aim of the research was to synthesize polymers having a highly developed internal structure and a good thermal stability. The synthesized materials were characterized by ATR-FTIR, scanning electron microscopy, a size distribution analysis, a low-temperature nitrogen adsorption-desorption method, differential scanning calorimetry, and thermogravimetry coupled with FTIR and inverse gas chromatography. It was found that, depending on the functional monomer, regular microspheres with a specific surface area in the range of 418-746 m/g can be successfully synthesized. Moreover, all the synthesized copolymers showed a good thermal stability. In helium, they exhibited 5% mass losses at temperatures over 300 °C, whereas in air these values were only slightly lower. In addition, the presence of miscellaneous functional groups promoted diverse kinds of interactions. Therefore, the microspheres can be possibly use in many adsorption techniques including high temperature processes.
本研究介绍了永久性多孔聚合物微球的合成与表征。这些微球通过悬浮聚合获得，使用了多种功能单体，如4,4'-双(甲基丙烯酰氧基甲基苯基)砜、1,4-双(甲基丙烯酰氧基甲基)苯、4,4'-双(甲基丙烯酰氧基甲基苯基)甲烷、N-乙烯基吡咯烷酮、乙二醇二甲基丙烯酸酯以及作为共聚单体的二乙烯基苯。以甲苯和氯苯作为致孔溶剂。该研究的主要目的是合成具有高度发达内部结构和良好热稳定性的聚合物。通过衰减全反射傅里叶变换红外光谱(ATR-FTIR)、扫描电子显微镜、粒度分布分析、低温氮吸附-脱附法、差示扫描量热法以及热重分析联用傅里叶变换红外光谱和反相气相色谱对合成材料进行了表征。结果发现，根据功能单体的不同，可以成功合成比表面积在418 - 746 m²/g范围内的规则微球。此外，所有合成的共聚物都表现出良好的热稳定性。在氦气中，它们在温度超过300°C时质量损失5%，而在空气中这些值仅略低。此外，各种功能基团的存在促进了多种相互作用。因此，这些微球可能可用于包括高温过程在内的许多吸附技术中。
