Abstract
A series of fluorinated polyimide/POSS hybrid polymers (FPI-4-FPI-16) were prepared via a facile synthetic route using 2,2'-bis(trifluoromethyl)benzidine, 4,4'-oxydiphthalic dianhydride and monofunctional POSS as starting materials. The hybrid polymers showed excellent solubility and film formation ability. Flexible and robust hybrid films could be conveniently obtained via solution-casting. The hybrid films demonstrated low dielectric constants and high thermal stability. Their dielectric constants were in the range of 2.47–2.92 at 1 MHz measured for their capacitance, and were tunable and decreased with an increase of POSS content. Their 10% weight loss temperatures were in the range of 539-591 °C and the weight residual at 800 °C ranged from 48% to 53% in nitrogen atmosphere. These hybrid films also possessed good mechanical properties and hydrophobic characteristics. This work could provide a potential strategy for the preparation of fluorinated polyimide/POSS hybrid polymers.
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This work was financially supported by the National Natural Science Foundation of China (No. 21404016), Natural Science Foundation of Jiangsu Province (No. BK20141173), Opening Project of State Key Laboratory of Electrical Insulation and Power Equipment (No. EIPE14206) and Qing Lan Project for Excellent Young Teachers of Jiangsu Province.
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Wang, Cy., Chen, Wt., Xu, C. et al. Fluorinated polyimide/POSS hybrid polymers with high solubility and low dielectric constant. Chin J Polym Sci 34, 1363–1372 (2016). https://doi.org/10.1007/s10118-016-1845-x
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DOI: https://doi.org/10.1007/s10118-016-1845-x