TY  - EJOU
AU  - Sardari, Azam 
AU  - Alvani, Ali Asghar Sabbagh 
AU  - Ghaffarian, Seyed Reza 

TI  - Synthesis and Characterization of Novel Castor Oil-Based Polyol for Potential Applications in Coatings
T2  - Journal of Renewable Materials

PY  - 2019
VL  - 7
IS  - 1
SN  - 2164-6341

AB  - 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.
KW  - Castor oil
KW  -  dean-Stark
KW  -  polyol
KW  -  epoxidation

DO  - 10.32604/jrm.2019.00045