Affiliation:
1. 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, China
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.
Funder
National Natural Science Foundation of China
Publisher
Bentham Science Publishers Ltd.
Subject
General Chemical Engineering