Preparation of Heat-Resistant Enameled Wire Coating of Fluorinated Poly (Ether Ether Ketone) and Properties

Abstract:

The soluble poly (ether ether ketone) (PEEK) containing trifluoromethyl group (FPEEK) was prepared by nucleophilic polycondensation reaction of 4, 4'-difluorobenzophenone and 4, 4′-(hexafluoroisopropylidene) diphenol in the presence of an excess of anhydrous K₂CO₃ with tetramethylene sulfone as the solvent. The structure and thermal stability of FPEEK were studied by Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, X-ray diffractometer and thermogravimetric analyzer. The solubility of FPEEK was also investigated using different organic solvents. Then the solution of FPEEK in N, N-dimethylformamide (DMF) was applied to prepare insulating coating. The mechanical properties of the coating were tested. The results show that FPEEK is soluble in common organic solvents such as chloroform, tetrahydrofuran and DMF. FPEEK shows high thermal stability with the initial degradation temperature of 536 °C in nitrogen. The insulating coatings of FPEEK exhibit the good adhesion, flexibility and impact resistance.

• Periodical: Advanced Materials Research (Volume 1035)
• Pages: 432-436
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1035.432
• Online since: October 2014
• Authors: Ting Gui, Yun Zhao*, Qing Ze Jiao, Han Sheng Li, Qin Wu
• Keywords: Enameled Wire Coating, Fluorinated Poly(ether ether ketone), Heat Resistance, Solubility

References

[1] [1] [1] Impact resistance (cm).

[50] [50] [50] Elasticity (mm) 0. 5 0. 5 0. 5 Table 2. Mechanical properties of different weight percent of FPEEK coating wt(%).

[10] [20] [30] [40] [42] Adhesion (grade).

[1] [1] [1] [1] [1] Impact resistance (cm).

[50] [50] [50] [50] [50] Elasticity (mm) 0. 5 0. 5 0. 5 0. 5 0. 5 Conclusions 1. A novel FPEEK was successfully synthesized by a nucleophilic polycondensation reaction. And it could be dissovled in most common organic solvents such as DMF, chloroform and THF. It also shows high thermal stability with an initial decomposition temperature of 536 °C. 2. FPEEK coating shows good mechanical properties. When the weight percent of FPEEK is 10%~42% and the molecular weight was in 30000~50000, the adhesion, impact resistance and elasticity of FPEEK coating reach the grade 1, 50 cm and 0. 5 mm respectively. 3. The excellent properties of FPEEK make it have a great potential application in the heat resistant enameled wire coating. Acknowledgement This work was supported by the project on the integration of Industry, Education and Research of Zhuhai (2012D0501990001). References.