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A Novel Poly(Ionic Liquid) as the Thermal Insulating Material

Author(s):

Wenxin Wei, Guifeng Ma, Hongtao Wang* and Jun Li*   Pages 1 - 7 ( 7 )

Abstract:


Objective: A new poly(ionic liquid)(PIL), poly(p-vinylbenzyltriphenylphosphine hexafluorophosphate) (P[VBTPP][PF6]), was synthesized by quaternization, anion exchange reaction, and free radical polymerization. Then a series of the PIL were synthesized at different conditions.

Methods: The specific heat capacity, glass-transition temperature and melting temperature of the synthesized PILs were measured by differential scanning calorimeter. The thermal conductivities of the PILs were measured by the laser flash analysis method.

Results: Results showed that, under optimized synthesis conditions, P[VBTPP][PF6] as the thermal insulator had a high glass-transition temperature of 210.1°C, high melting point of 421.6°C, and a low thermal conductivity of 0.0920 W m-1 K-1 at 40.0 °C (it was 0.105 W m-1 K-1 even at 180.0 °C). The foamed sample exhibited much low thermal conductivity λ=0.0340 W m-1 K-1 at room temperature, which was comparable to a commercial polyurethane thermal insulating material although the latter had a much lower density.

Conclusion: In addition, mixing the P[VBTPP][PF6] sample into polypropylene could obviously increase the Oxygen Index, revealing its efficient flame resistance. Therefore, P[VBTPP][PF6] is a potential thermal insulating material.

Keywords:

Poly(p-vinylbenzyltribenzylphosphinehexafluorophosphate), Poly(ionic liquid), Thermal stability, Thermal conductivity

Affiliation:

Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen 361005, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen 361005, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen 361005, Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen 361005



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