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Interchange reaction kinetics and sequence distribution of liquid crystalline poly(ethylene terephthalate-co-2(3)-chloro-1,4-phenylene terephthalate)

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Abstract

Liquid crystalline (LC) poly(ethylene terephthalate-co-2(3)-chloro-1,4-phenylene terephthalate) [copoly(ET/CPT)] was prepared using poly(ethylene terephthalate) (PET) as a flexible spacer, terephthalic acid (TPA), and chlorohydroquinone diacetate (CHQDA). All reactions involved in the copolymerization were investigated using some model compounds: TPA was used for acidolysis, diphenylethyl terephthalate (DPET) for interchange reaction between PET chains, and di-o-chlorophenyl terephthalate (DOCT) and di-m-chlorophenyl terephthalate (DMCT) for interchange reaction between PET and rigid rodlike segments. Activation energies obtained for the acidolysis of PET with TPA and for interchange reaction of PET with DPET, DOCT, and DMCT were 19.8 kcal/mole, 26.5 kcal/mole, 60.2 kcal/mole, and 45.9 kcal/mole, respectively. This result supports that the copolymerization proceeds through the acidolysis of PET with TPA first and subsequent polycondensation between carboxyl end group and CHQDA or acetyl end group, which is formed from the reaction of CHQDA and TPA. Also, it was found that ester-interchange reaction can be influenced by the steric hindrance. Copoly(ET/CPT)s obtained had ethylene acetate end groups formed from acetic acid and hydroxy ethylene end groups and showed almost the random sequence distribution for all compositions.

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Authors and Affiliations

  1. Department of Textile Engineering, Chonnam National University, 300 Yongbong-dong, Puk-ku, 500-757, Kwangju, Korea

    Do Mook Rhee, Wan Shik Ha, Ji Ho Youk & Dong Il Yoo

  2. Samyang Group Central R & D Center, 63-2 Hwaam-Dong, Yusung-ku, 305-348, Taejeon, Korea

    Do Mook Rhee

  3. Department of Fiber and Polymer Science, Seoul National University, Shinlim-dong, Kwanak-ku, 151-742, Seoul, Korea

    Wan Shik Ha

  4. Department of Chemistry, University of Alabama at Birmingham, 35294-1240, Birmingham, AL, USA

    Ji Ho Youk

Authors
  1. Do Mook Rhee
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  2. Wan Shik Ha
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  3. Ji Ho Youk
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  4. Dong Il Yoo
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Correspondence to Dong Il Yoo.

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Rhee, D.M., Ha, W.S., Youk, J.H. et al. Interchange reaction kinetics and sequence distribution of liquid crystalline poly(ethylene terephthalate-co-2(3)-chloro-1,4-phenylene terephthalate). Fibers Polym 2, 86–91 (2001). https://doi.org/10.1007/BF02875264

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  • DOI: https://doi.org/10.1007/BF02875264

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