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Progress in Chemistry 2009, Vol. 21 Issue (01): 182-199 Previous Articles   Next Articles

• Review •

FT-IR Characterization of Liquid Crystalline Polymers

Sun Shengtong;Tang Hui;Wu Peiyi**   

  1. (The Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China)
  • Received: Revised: Online: Published:
  • Contact: Wu Peiyi E-mail:peiyiwu@fudan.edu.cn
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Infrared spectroscopy (IR) is a well-established nondestructive method for highly selective identification and real-time tracing of LCPs chemical species. Additionally, the development of polarized IR, time-resolved IR and two-dimensional correlation IR gives more information about LCPs. In this review, current progress in characterization of LCPs by traditional FT-IR and novel spectra analysis technologies (mainly two-dimensional correlation analysis) is presented, especially in the investigation of hydrogen-bonds in LCPs, compatibility of liquid crystalline copolymers and blends, and orientation behaviors upon different perturbations (temperature, electric field, light, strain). Concrete examples in each case are also presented here helping illustrate the applications of different infrared spectral analysis methods.

Contents
1 Introduction
1.1 Liquid crystalline polymers
1.2 Infrared spectroscopy (IR) and two-dimensional correlation infrared spectroscopy (2DIR)
2 FT-IR characterization of liquid crystalline polymers
2.1 IR and 2DIR studies on hydrogen-bonds in LCPs
2.2 IR studies on the compatibility of liquid crystalline copolymers and blends
2.3 IR and 2DIR studies on the structure variation of LCPs upon different perturbations
3 Concluding remarks

Key words: liquid crystalline polymers(LCPs), polarized infrared spectroscopy, time-resolved infrared spectroscopy, two-dimensional correlation infrared spectroscopy, perturbation, liquid crystalline orientation

CLC Number: 

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