Volume 136, Issue 4 47000
Article

Vanillin-based polymers: IV. Hydrovanilloin epoxy resins

Ananda S. Amarasekara

Corresponding Author

Ananda S. Amarasekara

Department of Chemistry, Prairie View A&M University, Prairie View, Texas, 77446 USA

Correspondence to: A. S. Amarasekara (E-mail: [email protected])Search for more papers by this author
Rocio Garcia-Obergon

Rocio Garcia-Obergon

Department of Chemistry, Prairie View A&M University, Prairie View, Texas, 77446 USA

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Audie K. Thompson

Audie K. Thompson

Department of Chemical Engineering, Prairie View A&M University, Prairie View, Texas, 77446 USA

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First published: 14 August 2018
Citations: 31

ABSTRACT

In this study, hydrovanilloin synthesized by electrochemical dimerization of vanillin has been used as a renewable substitute for bisphenol A for the preparation of epoxy resins. The reaction of the disodium salt of hydrovanilloin:epichlorohydrin 1:2 mol ratio at 80°C for 30 min in water gave a hydrovanilloin – diglycidyl ether phenoxy resin. This hard thermoplastic resin showed Tg of 135°C and stable up to 255°C in air. On the other hand, the disodium salt of hydrovanilloin:epichlorohydrin 1:4 mol ratio at 80°C for 30 min in water gives a curable oligomer of hydrovanilloin – diglycidyl ether with 2.1 repeating units. This oligomer could be cured with aliphatic diamines: 1,2-diaminoethane, 1,4-diaminobutane, 1,6-diaminohexane, and isophorone diamine to give hard epoxy resins with Tg values of 116, 118, 149 and 146°C, respectively. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47000.

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