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本文测定了聚乙炔在氮气、空气和氧气中的等速升温热重曲线,测定了不同聚乙炔样品热氧化的恒温热重曲线,比较了聚合体系和顺反结构等对热氧化行为的影响。观察到钕催化聚乙炔的热氧化诱导现象。动力学分析表明,氧化反应对聚乙炔和氧气浓度都接近表观一级反应,顺式聚乙炔的表观活化能为42±6ki/mol,反式聚乙炔为51±6kJ/mol。用红外光谱跟踪氧化过程,表明含氧基团可分两类,分属于中间和最终产物,由此推断了可能的氧化反应。
In this paper, the thermogravimetric curves of polyacetylene in nitrogen, air and oxygen were measured. The thermogravimetric curves of different polyacetylene samples were determined. The effects of polymerization system and cis / trans structure on the thermal oxidation behavior were also compared. Neodymium-catalyzed thermal oxidation of polyacetylene was observed. Kinetic analysis shows that the oxidation reaction is close to the apparent first order reaction for both polyacetylene and oxygen. The apparent activation energy of cis-polyacetylene is 42 ± 6ki / mol and the trans-polyacetylene is 51 ± 6kJ / mol. Infrared spectroscopy followed the oxidation process, indicating that the oxygen-containing groups can be divided into two categories, belonging to the intermediate and the final product, which concluded that the possible oxidation reaction.