期刊
SYNTHETIC METALS
卷 175, 期 -, 页码 112-119出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2013.05.006
关键词
6FPBOT; POSS; Nanocomposites; Mechanical properties; Dielectric properties
资金
- National Natural Science Foundation of China (NSFC) [50973028]
- Shanghai Natural Science Foundation [12ZR1407900]
This article reports the in situ preparation of fluorinated poly-(2,5-thienylbenzobisoxazole)/polyhedral oligomeric silsesquioxane (6FPBOT/POSS) nanocomposites and their chemical and physical properties. POSS participated in the polymerization reaction and thus led to the homogenous dispersion of POSS nanoparticles in the 6FPBOT matrix. The structures and morphology of the obtained nanocomposites were fully characterized by Fourier transform infrared spectroscopy, wide-angle X-ray scattering, thermogravi-metric analysis, and transmission electron microscopy. The nanocomposites exhibited excellent thermal stability. The introduction of POSS evidently increased the mechanical properties (tensile strength and tensile modulus) of the nanocomposites and significantly enhanced the quantum yield of 6FPBOT by reducing the degree of interchain aggregation. The dielectric constants of the nanocomposites decreased with increasing POSS content. The dielectric constant of the materials decreased from 2.56 for the 6FPBOT to 2.11 for the 6FPBOT-POSS nanocomposite with 5% POSS. (c) 2013 Elsevier B.V. All rights reserved.
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