Preparation and Properties of Plant-Oil-Based Epoxy Acrylate-Like Resins for UV-Curable Coatings

Polymers

Rongrong An¹  Jijun Tang²  Jianyu Lu²  Yuanyuan Chen³  Jia Huang³  Yonghong Zhou³  Yun Hu³  Chengguo Liu³  Jinshuai Zhang³  Hongcheng Miao³  Tian Huang³  Fei Zhang³ 

[1] College of Geographic and Biologic Information, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;College of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China;Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China;

关键词: soybean oil;    rubber seed oil;    wilsoniana seed oil;    epoxy acrylate;    UV-curable coatings;   

DOI  :  10.3390/polym12092165

来源: DOAJ

【 摘 要 】

Novel oil-based epoxy acrylate (EA)-like prepolymers were synthesized via the ring-opening reaction of epoxidized plant oils with a new unsaturated carboxyl acid precursor (MAAMA) synthesized by reacting maleic anhydride (MA) with methallyl alcohol (MAA). Since the employed epoxidized oils including epoxidized soybean oil (ESO), epoxidized rubber seed oil (ERSO), and epoxidized wilsoniana seed oil (EWSO) possessed epoxy values of 7.34–4.38%, the obtained epoxy acrylate (EA)-like prepolymers (MMESO, MMERSO, and MMEWSO) indicated a C=C functionality of 7.81–4.40 per triglyceride. Furthermore, effects of the C=C functionality and the addition of hydroxyethyl methacrylate (HEMA) diluent on the ultimate properties of the resulting UV-cured EA-like materials were investigated and compared with those of commercially available acrylated ESO (AESO) resins. As the C=C functionality increased, the storage modulus at 25 °C (E’₂₅), glass transition temperature (T_g), 5% weight–loss temperature (T₅), tensile strength and modulus (σ and E), and hardness of the coating for both the pure EA and EA/HEMA resins increased significantly as well. These properties indicated similar trends when comparing the EA materials with 30% of HEMA with those pure EA materials. Specially, although ERSO had a clearly lower epoxy value that ESO, both the UV-cured pure MMERSO and MMERSO/HEMA materials showed much better E’₂₅, T_g, σ, and E than their AESO counterparts, indicating that the MAAMA modification of epoxidized plant oils was much more effective than the modification of acrylic acid to achieve high-performance oil-based epoxy acrylate resins.

【 授权许可】

Unknown