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Thermal degradation of some ferrocene-containing poly(aryleneethynylene)s

机译:某些含二茂铁的聚亚芳基乙炔的热降解

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This study reports the thermal degradation behaviour of two ferrocene-containing poly(aryleneethynylene)s. It reveals the influences of polymer structures and working atmospheres on the mechanism of thermal degradation by means of the gas analysis produced upon thermal decomposition in the mass spectrometer and FTIR spectrophotometer using the TG/MS/FTIR coupled technique. The cross -linked ferrocene-containing poly(aryleneethynylene) P1 contains terminal ferrocene groups. The initial thermal decomposition of this polymer, in an inert atmosphere, takes place at the terminal ferrocene groups, as evidenced by the presence of the m/z = 186 ionic fragment. There is a mass increase in the air, which can be associated with the production of FeO or Fe2O3; at temperatures exceeding 170 degrees C, the degradation of the cyclopentadienyl (C5H5+) ion also occurs. In the case of the polymer P2, the initial thermal decomposition in an inert atmosphere, but probably also in the air, takes place at the lateral hexadecyloxy chains due to the fact that ionic fragments resulting from the C-C splitting are identified by the general formula CnH2n-1, CQH(2), and C-n, H2n+1 in the MS spectra, The FTIR spectra further confirm this observation; C-H aliphatic stretching is found in the range of 3000-2800 cm(-1). (C) 2016 Elsevier B.V. All rights reserved.
机译:这项研究报告了两种含二茂铁的聚亚芳基乙炔的热降解行为。通过使用TG / MS / FTIR耦合技术在质谱仪和FTIR分光光度计中进行热分解时产生的气体分析,揭示了聚合物结构和工作气氛对热降解机理的影响。交联的含二茂铁的聚(亚芳基乙炔基)P1包含末端二茂铁基团。该聚合物在惰性气氛中的初始热分解发生在末端二茂铁基团上,这通过m / z = 186离子片段的存在来证明。空气质量增加,这可能与FeO或Fe2O3的产生有关。在超过170摄氏度的温度下,还会发生环戊二烯基(C5H5 +)离子的降解。在聚合物P2的情况下,由于通过CC拆分产生的离子片段由通式CnH2n标识,因此在惰性气氛中(也可能在空气中)的初始热分解发生在侧向十六烷氧基链上。质谱图中的-1,CQH(2)和Cn,H2n +1。FTIR光谱进一步证实了这一观察结果;发现C-H脂族拉伸范围为3000-2800 cm(-1)。 (C)2016 Elsevier B.V.保留所有权利。

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