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...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 ℃ and the weight residual at 800 ℃ 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.展开更多
基金financially supported by the National Natural Science Foundation of China(No.21404016)Natural Science Foundation of Jiangsu Province(No.BK20141173)+1 种基金Opening Project of State Key Laboratory of Electrical Insulation and Power Equipment(No.EIPE14206)Qing Lan Project for Excellent Young Teachers of Jiangsu Province
文摘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 ℃ and the weight residual at 800 ℃ 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.
