TY - EJOU AU - Shrestha, Maha L. AU - Ionescu, Mihail AU - Wan, Xianmei AU - Upshaw, Thomas TI - Biobased Aromatic-Aliphatic Polyols by Thiol-Ene Reactions of Propoxylated Mercaptanized Cardanol T2 - Journal of Renewable Materials PY - 2018 VL - 6 IS - 6 SN - 2164-6341 AB - Aromatic-aliphatic polyols were obtained previously from the thiol-ene reactions of propoxylated cardanol with hydroxyalkyl mercaptans; these aromatic-aliphatic polyols were then utilized in the preparation of rigid polyurethane foams with excellent properties. The current work describes a variant of cardanol polyol synthesis by thiol-ene reactions in three steps. The first step is propoxylation of cardanol by reacting cardanol with propylene oxide; the second step is mercaptanization of propoxylated cardanol by reacting double bonds with hydrogen sulfide; and the third step involves the addition of the thiol groups of mercaptanized propoxylated cardanol to the double bonds of allyl alcohol, glycerol-1-allyl ether, and trimethylolpropane allyl ether. Thus, obtained polyols were characterized by standard analytical methods. Rigid polyurethane foams prepared from these polyols show promising physical-mechanical properties. The rigid polyurethane foams can be used for various applications such as thermo-insulation of freezers, storage tanks and pipes for food and chemical industries, wood substitutes and flotation materials. KW - Cardanol KW - mercaptanized propoxylated cardanol KW - photochemical thiol-ene reaction KW - allyl alcohol KW - glycerol-1-allyl ether KW - trimethylolpropane allyl ether DO - 10.7569/JRM.2018.634106