Synthesis and Properties of Tung Oil-Based Unsaturated Co-Ester Resins Bearing Steric Hindrance

Polymers

Qianqian Shang¹  Wen Lei¹  Guodong Feng²  Yonghong Zhou³  Rongrong An³  Puyou Jia⁴  Qiong Wu⁴  Yun Hu⁵  Chengguo Liu⁵ 

[1] Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Province;Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China;Key Lab of Biomass Energy and Material, Jiangsu Province;Key Lab of Chemical Engineering of Forest Products, National Forestry and Grassland Administration;National Engineering Lab for Biomass Chemical Utilization;

关键词: tung oil;    unsaturated polyester resins;    thermosetting polymers;    structure–property relationship;    structural plastics;   

DOI  :  10.3390/polym11050826

来源: DOAJ

【 摘 要 】

New tung oil (TO)-based, unsaturated, co-ester (Co-UE) macromonomers bearing steric hindrance were synthesized by modifying a TO-based maleate (TOPERMA) monomer with an anhydride structure with hydroxyethyl methacrylate (HEMA) and methallyl alcohol (MAA), respectively. The obtained Co-UE monomers (TOPERMA-HEMA and TOPERMA-MAA) were then characterized by ¹H NMR and gel permeation chromatography (GPC). For comparison, hydroxyethyl acrylate (HEA)-modified TOPERMA (TOPERMA-HEA) was also synthesized and characterized. Subsequently, the obtained Co-UEs were thermally cured with styrene, and the ultimate properties of the resulting materials were studied. It was found that by introducing the structure of steric hindrance into the TO-based Co-UE monomer, the tensile strength and Young’s modulus of the resulting materials were improved. Furthermore, by reducing the length of the flexible chain in the Co-UE monomer, the tensile strength, Young’s modulus, and glass transition temperature (T_g) of the resultant materials were also improved. The TOPERMA-MAA resin gave the best performance in these TO-based Co-UE resins, which showed a tensile strength of 32.2 MPa, Young’s modulus of 2.38 GPa, and T_g of 130.3 °C. The developed ecofriendly materials show promise in structural plastic applications.

【 授权许可】

Unknown