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Preparation and characterization of high molecular weight novolak resins

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Summary

High molecular weight novolak resins were prepared from phenol and paraformaldehyde in organic solvents, e.g., 2-propanol, ethyl propionate, 2-methoxyethanol, 4-methyl-2-pentanone, dioxane and acetic acid. The molecular weights were estimated by gel permeation chromatography (GPC) and solution viscosity measurement and it was confirmed that high molecular weight resins were formed in organic solvents. The structure was determined by13C-NMR measurements, and it was found that the resin obtained in organic solvent was a random novolak with higher molecular weight than a conventional novolak.

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Authors and Affiliations

  1. Department of Chemistry and Chemical Engineering, Faculty of Technology, Kanazawa University, 920, Kanazawa, Japan

    Tada-Aki Yamagishi, Shingo Ito, Shin-ichiro Ishida & Yoshiaki Nakamoto

  2. Graduate School of Natural Science and Technology, Kanazawa University, 920, Kanazawa, Japan

    Masahiro Nomoto

Authors
  1. Tada-Aki Yamagishi
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  2. Masahiro Nomoto
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  3. Shingo Ito
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  4. Shin-ichiro Ishida
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  5. Yoshiaki Nakamoto
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Yamagishi, TA., Nomoto, M., Ito, S. et al. Preparation and characterization of high molecular weight novolak resins. Polymer Bulletin 32, 501–507 (1994). https://doi.org/10.1007/BF00973894

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  • DOI: https://doi.org/10.1007/BF00973894

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