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Synthesis and Characterization of Novel Castor Oil-Based Polyol for Potential Applications in Coatings

Azam Sardari1,2, Ali Asghar Sabbagh Alvani1,2,3,*, Seyed Reza Ghaffarian1,2
Color & Polymer Research Center (CPRC), Amirkabir University of Technology, Tehran, 158754413, Iran.
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, 158754413, Iran.
Advanced Materials Group, Iranian Color Society (ICS), 1591637144, Tehran, Iran.
*Corresponding Author: Ali Asghar Sabbagh Alvani. Email: .

Journal of Renewable Materials 2019, 7(1), 31-40. https://doi.org/10.32604/jrm.2019.00045

Abstract

In this study, three sorts of polyols were successfully synthesized from castor oil using a Dean-Stark quick, eco-friendly and high-efficiency method. For this purpose, castor oil was epoxidized in the presence of two types of catalysts including γ-alumina and formic acid, named as ECOAl and ECOF, respectively. Epoxidized castor oils were then characterized by use of hydrogen nuclear magnetic resonance (H-NMR) and oxirane oxygen content analysis. The relative percentages of conversion double bond to oxirane were obtained 96% and 74% for ECOAl and ECOF, respectively. Ring opening reaction of ECOAl was performed by two types of saponified castor oil as well as castor oil in a system equipped with Dean–Stark apparatus. The synthesized polyols were characterized by attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), viscometer and OH number evaluation. The material obtained in this research is a candidate to be intended in synthesis of polyurethane for coating applications.

Keywords

Castor oil, dean-Stark, polyol, epoxidation

Cite This Article

Sardari, A., Asghar, A., Ghaffarian, S. R. (2019). Synthesis and Characterization of Novel Castor Oil-Based Polyol for Potential Applications in Coatings. Journal of Renewable Materials, 7(1), 31–40.

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This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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