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19-04-2019 | Issue 8/2019

Journal of Materials Science: Materials in Electronics 8/2019

Effect of NH2-functionalized carbon nanospheres on the performances of poly(p-phenylene benzobisoxazole)/carbon nanospheres nanocomposite films

Journal:
Journal of Materials Science: Materials in Electronics > Issue 8/2019
Authors:
WenJuan Kou, Jun Qian, XueXue Chen, Qiang Liu, QiXin Zhuang
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Abstract

This paper has reported the fabrication of poly(p-phenylene benzobisoxazole) (PBO)/carbon nanospheres (CS) nanocomposite films synthesized through two preparation process. Compared with solution blending method, in-situ polymerization method is demonstrated to be more effective in this system because it can provide homogeneous dispersion and interfacial interaction between polymer and fillers. Designed NH2-functionalized carbon nanospheres (DAR-CS) have numerous terminal amine functional groups, which not only promote the dispersion successfully, but also provide a platform to attach PBO molecular chains. PBO-DAR-CS nanocomposite films with 1.5 wt% DAR-CS show higher dielectric permittivity (10.95) as well as lower dielectric loss (0.027) at 1 kHz and 200 °C. Excellent tensile properties (tensile strength = 106 MPa, Young’s modulus = 6.6 GPa) are observed as well as high thermal stability (decomposition temperature = 634 °C). This work has shown the distinct difference of dispersion and chemical bonding during the preparation process on the ultimate properties of PBO/CS nanocomposite films. The obtained PBO-DAR-CS composite films may be one of the promising dielectric materials applied in harsh environments.

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