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Phosphorus-containing polyimide fibers and their thermal properties

机译：含磷的聚酰亚胺纤维及其热性能

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摘要

Phosphorus-containing polyimide was synthesized by solution polycondensation reaction of bis(3-aminophenyl) methyl phosphine oxide with 4,4'-(4,4'-isopropylidenediphenoxy) bis(phthalic anhydride). The chemical characterization of polyimide was done using FTIR and NMR spectroscopy. Also, the influence of different parameters on the rheological and thermal behavior of the polyimide was investigated. We were able to prepare uniform submicron-or nano-sized fibers by electrospinning highly viscous polyimide solutions. The diameters of the electrospun fibers increased from 58 nm to 347 nm as the concentration of the polyimide solution was raised from 10 to 24 wt%. Isoconversional kinetic analysis of the thermal decomposition of the polyimide was performed using Friedman and Ozawa-Flynn-Wall methods. The thermal decomposition mechanism of polyimide was evaluated and proposed using thermogravimetric analyzer-Fourier transform infrared spectroscopy (TGA-FTIR) and pyrolysis gas chromatography mass spectroscopy (Py-GC-MS). The results showed a complex degradation process of the main chain, which started with the scission of weaker bonds such as ether, alkyl, imide and some aromatic groups. The char residue of the polyimide fibers from TGA experiments were analyzed using scanning electron microscopy (SEM). It exhibited a dense structure, with a homogeneous dispersion of phosphorus atoms.
机译：通过双（3-氨基苯基）甲基氧化氨酸溶液用4,4' - （4,4'-异丙基噻嗪氧基）双（邻苯二甲酸酐）来合成含磷的聚酰亚胺。使用FTIR和NMR光谱完成聚酰亚胺的化学表征。而且，研究了不同参数对聚酰亚胺的流变和热行为的影响。我们能够通过静电纺丝高粘性的聚酰亚胺溶液制备均匀的亚微米或纳米尺寸的纤维。当聚酰亚胺溶液的浓度从10至24wt％升高，电纺纤维的直径从58nm增加到347nm。使用弗里德曼和甲革南飞壁方法进行聚酰亚胺的热分解的同焦型动力学分析。评估聚酰亚胺的热分解机制，并采用热重分析仪 - 傅里叶变换红外光谱（TGA-FTIR）和热解气相色谱质谱（PY-GC-MS）。结果表明，主链的复杂降解过程，其开始于较弱的键，例如乙醚，烷基，酰亚胺和一些芳族基团。使用扫描电子显微镜（SEM）分析来自TGA实验的聚酰亚胺纤维的炭残余物。它表现出致密的结构，具有均匀的磷原子分散。

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  • 来源
    《RSC Advances》 |2016年第44期|共9页
  • 作者

    Serbezeanu Diana; Butnaru Irina; Varganici Cristian-Dragos; Bruma Maria; Fortunato Giuseppino; Gaan Sabyasachi;

  • 作者单位

    Petru Poni Inst Macromol Chem Aleea Gr Ghica Voda 41A Iasi 700487 Romania;

    Petru Poni Inst Macromol Chem Aleea Gr Ghica Voda 41A Iasi 700487 Romania;

    Petru Poni Inst Macromol Chem Aleea Gr Ghica Voda 41A Iasi 700487 Romania;

    Petru Poni Inst Macromol Chem Aleea Gr Ghica Voda 41A Iasi 700487 Romania;

    Empa Swiss Fed Labs Mat Sci &

    Technol Lerchenfeldstr 5 CH-9014 St Gallen Switzerland;

    Empa Swiss Fed Labs Mat Sci &

    Technol Lerchenfeldstr 5 CH-9014 St Gallen Switzerland;

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  • 正文语种 eng
  • 中图分类 化学;
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