双键化香草醇的制备及对双键功能化大豆油树脂性能的影响

Preparation of Double-Bond Functionalized Vanillyl Alcohol and Its Effect on Properties of Maleinated Acrylated Epoxidized Soybean Oil Resin

利用生物基香草醇为原料,通过与甲基丙烯酸酐发生酯化反应制得了具有低挥发性和低黏度的双键化香草醇(DBVA),考察了DBVA的化学结构和挥发性,并将其和苯乙烯(St)分别用作双键功能化大豆油树脂(MAESO)的活性稀释剂,系统评价了MAESO-DBVA树脂体系和MAESO-St树脂体系的固化行为,以及固化后材料的热力学性能和热稳定性。结果表明,35%DBVA活性稀释剂的引入不仅显著降低了MAESO体系的黏度,改善其加工性能,同时提高了MAESO树脂的玻璃化转变温度(达到78.9℃)。因而,双键化香草醇有望成为苯乙烯的潜在替代物,进而成为石油基不饱和聚酯和乙烯酯树脂的活性稀释剂。

A low volatility,low viscosity,double-bond functionalized vanillyl alcohol(DBVA)was prepared by esterification reaction between bio-based vanillyl alcohol and methacrylic anhydride.The chemical structure and volatility of DBVA were investigated.Styrene(St)and DBVA were used as reactive diluent of maleinated acrylated epoxidized soybean oil(MAESO).The curing behaviors,thermomechanical properties,and thermal stabilies of MAESO-DBVA and MAEO-St resin systems were systematically compared.The results show that the introduction of 35%DBVA reactive diluent not only significantly reduces the viscosity of the MAESO resin system and imparts a good processability,but also improves the glass transition temperature of the MAESO resin to 78.9℃.Therefore,DBVA is a potential reactive diluent and can be used as sustainable alternative to styrene in unsaturated polyester and vinyl ester resins.