Preparation and thermal properties of novel phthalonitrile oligomer containing biphenyl ethernitrile/bisphthalonitrile blends

Authors

  • Xiaoli Yang,

    1. Research Branch of Advanced Functional Materials, Institute of Microelectronic and Solid State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
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  • Yajie Lei,

    1. Research Branch of Advanced Functional Materials, Institute of Microelectronic and Solid State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
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  • Jiachun Zhong,

    Corresponding author
    1. Research Branch of Advanced Functional Materials, Institute of Microelectronic and Solid State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
    • Research Branch of Advanced Functional Materials, Institute of Microelectronic and Solid State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
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  • Rui Zhao,

    1. Research Branch of Advanced Functional Materials, Institute of Microelectronic and Solid State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
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  • Xiaobo Liu

    1. Research Branch of Advanced Functional Materials, Institute of Microelectronic and Solid State Electronic, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
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Abstract

A kind of novel n = 2 phthalonitrile oligomer containing biphenyl ethernitrile (2PEN-BPh) had been firstly synthesized from 2,6-dichlorobenzonitrile, 4,4′-biphenol and 4-nitrophthalonitrile via solution reaction, and the 2PEN-BPh was characterized by FTIR, 1H-NMR spectra which exhibited that cyano groups and ethernitrile linkages existed in the backbone of 2PEN-BPh. The 2PEN-BPh oligomer was blended with bisphthalonitrile monomer, the curing reaction behaviors of the blends were studied by FTIR, DSC, and rheological analysis. The thermal and thermo-oxidative stabilities of the 2PEN-BPh/BPh polymers were investigated by TGA, and the results showed that the completely cured polymers could achieve char yields up to 78% at 800°C in nitrogen, above 11% at 800°C in air. The whole research indicated that the 2PEN-BPh/BPh blends could efficiently improve the processability of BPh monomer without scarifying other desirable high temperature properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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