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Dependence of ESR spectra of poly(fumaric ester) radicals on temperature and ester alkyl group

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Summary

ESR spectra of polymer radical from fumaric esters bearing different ester alkyl groups were recorded at room temperature and 120°C. Simulation for the spectra with much better resolution at 120°C revealed that the spectra consist of three components differentiated by molecular weight of the polymer radical and that the component corresponding to the highest molecular weight radical increased with increasing total bulkiness of the ester alkyl groups. Gel permeation chromatography of the polymerization mixture exhibited that the radicals corresponding to the respective spectral components repeat propagation to reach high molecular weight prior to termination.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Osaka City University, 558, Sugimoto, Sumiyoshi-ku, Osaka, Japan

    Bunichiro Yamada, Mitsuo Fujita, Seiya Kobatake & Takayuki Otsu

Authors
  1. Bunichiro Yamada
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  2. Mitsuo Fujita
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  3. Seiya Kobatake
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  4. Takayuki Otsu
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Yamada, B., Fujita, M., Kobatake, S. et al. Dependence of ESR spectra of poly(fumaric ester) radicals on temperature and ester alkyl group. Polymer Bulletin 29, 225–232 (1992). https://doi.org/10.1007/BF00558061

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  • DOI: https://doi.org/10.1007/BF00558061

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