@Article{jrm.2024.056820,
AUTHOR = {Aiga Ivdre, Ralfs Pomilovskis, Arnis Abolins},
TITLE = {Polymer Resins Synthesized via the Michael 1,4-addition from Tall Oil Fatty Acids Using Various Epoxidation Techniques},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {13},
YEAR = {2025},
NUMBER = {2},
PAGES = {349--361},
URL = {http://www.techscience.com/jrm/v13n2/59539},
ISSN = {2164-6341},
ABSTRACT = {Studies on the use of renewable materials for various applications, including polymers, have gained momentum due to global climate change and the push towards a circular economy. In this study, polymer resins were developed through Michael 1,4-addition. The precursors were synthesized from tall oil-based acetoacetates derived from epoxidized tall oil fatty acids or their methyl esters. Two different epoxidation methods were employed: enzymatic epoxidation of tall oil fatty acids and ion-exchange resin epoxidation of tall oil fatty acid methyl esters. Following oxirane opening and transesterification with trimethylolpropane, further esterification or transesterification was carried out to obtain the acetoacetates. These synthesized acetoacetates were then reacted with acrylates of various functionalities to obtain polymer resins with differing degrees of crosslinking. The developed polymer resins were characterized using differential scanning calorimetry, dynamic mechanical analysis, and thermogravimetric analysis. The results indicated that the glass transition temperature and storage modulus of the polymer resins were significantly influenced by both the functionality of the acrylates used and the epoxidation technique employed. Higher acrylate functionality resulted in increased stiffness, while enzymatic epoxidation enhanced the polymer’s mechanical properties, nearly doubling the storage modulus, achieving approximately 470 MPa, compared to the ion-exchange resin technique. Therefore, selecting the appropriate acrylate functionality and epoxidation method could tailor the mechanical properties of the polymer resins.},
DOI = {10.32604/jrm.2024.056820}
}