Biobased Aromatic-Aliphatic Polyols by Thiol-Ene Reactions of Propoxylated Mercaptanized Cardanol

• 作者: Maha L.Shrestha Mihail Ionescu Thomas Upshaw Xianmei Wan
• 来源期刊: 可再生材料杂志(英文)
• 学科: 化学
• 关键词: CARDANOL mercaptanized propoxylated CARDANOL photochemical THIOL-ENE reaction ALLYL alcohol glycerol-1-allyl ETHER TRIMETHYLOLPROPANE ALLYL ETHER
• 年，卷（期）: kzsclzzyw_2018,（6）
• 页码范围: 630-641
• 页数: 12页
• 分类号: O62

摘要

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.