The Design, Synthesis and Properties of Ionic Liquid Crystal Polymers Based on “Jacketing” Effect

Weng Liang; Xie He-lou; Yan Jiaojiao; Zhong Guanqun; Zhang Hailiang

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The Design, Synthesis and Properties of Ionic Liquid Crystal Polymers Based on “Jacketing” Effect

Weng Liang 1,Xie He-lou 2 * #,Yan Jiaojiao 2,Zhong Guanqun 2,Zhang Hailiang 2

1.Department of Polymer Material and Engineering, College of Chemistry, Xiangtan University, Hunan Xiangtan 411105

2.Department of Polymer Material and Engineering, College of Chemistry, Xiangtan University, Hunan Xiangtan 411105

*Correspondence author

#Submitted by

Subject:

Funding: Doctoral Foundation of Ministry of Education of China （No.20114301120005）, National Nature Science Foundation of China （No.21104062）

Opened online: 5 September 2014

Accepted by: none

Citation: Weng Liang,Xie He-lou,Yan Jiaojiao.The Design, Synthesis and Properties of Ionic Liquid Crystal Polymers Based on “Jacketing” Effect[OL]. [ 5 September 2014] http://en.paper.edu.cn/en_releasepaper/content/4605229

In this work, we designed and successfully synthesized a series of novel ionic liquid crystal polymers (ILCPs) poly(2,5-bis{[4-(4-butoxy-4′-imidazolium biphenyl) butyl] oxy carbonyl} styrene salts) [denoted as poly(BImBBCS-X) (Xˉ=Brˉ, BF4ˉ, PF6ˉ and TFSIˉ)] with imidazolium and different counter-anions via radical polymerization based on "Jacketing"effect. Combined nuclear magnetic resonance spectroscopy (NMR) and fourier transform infrared spectroscopy (FT-IR), the chemical structures of the monomers and the corresponding polymers were confirmed. Thermogravimetric analysis (TGA) results indicated that the nature of counter-anions had an important effect on the thermal stability of ILCPs. The experiments of differential scanning calorimetry (DSC) and polarized light microscopy (PLM) were performed to investigate the phase transitions and liquid crystalline behaviors of polymers. The results showed that except for poly(BImBBCS-TFSI) other ILCPs could form liquid crystalline ordered structures due to the strong interaction between the ions. For poly(BImBBCS-TFSI), the large volume of anion TFSIˉ destroyed the packing of LC ordered structure. Obviously, the insertion of ions had an important effect on the constructing of LC ordered structure.

Keywords:Ionic Liquid Crystal Polymers (ILCPs); “Jacketing” Effect; Liquid Crystalline Behaviors

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