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<p>The reaction between epoxidized soybean oil (ESO) and rosin (RS) is monitored by Fourier transform infrared spectroscopy (FTIR). By integrating the acid value titration method with nuclear magnetic resonance (<sup>1</sup>H NMR), the reaction selectivity of carboxyl groups and hydroxyl groups with epoxy groups is analyzed. Moreover, the influence of the reactant ratio, reaction temperature, and the time on the reaction of RS with ESO is investigated. Rosin-modified epoxy soybean oil acrylates (ESORSAA) are synthesized via two routes, the reaction of ESORS with acrylic acid (AA) and the one-pot synthesis strategy of ESO, RS, and AA. The structure of the product is characterized by FTIR, <sup>1</sup>H NMR, and HRMS, and the photopolymerization kinetics of ESORSAA are evaluated. Upon 40 s of irradiation, the conversion of the acrylate double bond reaches 75%. Notably, an increase in the amount of RS results in a reduction in the photopolymerization rate. Additionally, the cured film containing ESORSAA exhibits excellent acid and alkali resistance. A formulation consisting of 30 wt% ESORSAA, 49 wt% NPGDA, 19 wt% TMPTA, 1 wt% Da-1173, and 1 wt% ITX is applied for 3D printing to produce various models with smooth surfaces, high precision, and excellent flexibility.</p>

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Synthesis of rosin-modified epoxy soybean oil acrylates and its UV curing properties

  • 期刊论文

  • 发表日期：

    2025年11月20日

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  • Jingjing Liu,
  • Xueqin Zou,
  • Fengwei Liu,
  • Jiaxi Wang

摘要

The reaction between epoxidized soybean oil (ESO) and rosin (RS) is monitored by Fourier transform infrared spectroscopy (FTIR). By integrating the acid value titration method with nuclear magnetic resonance (1H NMR), the reaction selectivity of carboxyl groups and hydroxyl groups with epoxy groups is analyzed. Moreover, the influence of the reactant ratio, reaction temperature, and the time on the reaction of RS with ESO is investigated. Rosin-modified epoxy soybean oil acrylates (ESORSAA) are synthesized via two routes, the reaction of ESORS with acrylic acid (AA) and the one-pot synthesis strategy of ESO, RS, and AA. The structure of the product is characterized by FTIR, 1H NMR, and HRMS, and the photopolymerization kinetics of ESORSAA are evaluated. Upon 40 s of irradiation, the conversion of the acrylate double bond reaches 75%. Notably, an increase in the amount of RS results in a reduction in the photopolymerization rate. Additionally, the cured film containing ESORSAA exhibits excellent acid and alkali resistance. A formulation consisting of 30 wt% ESORSAA, 49 wt% NPGDA, 19 wt% TMPTA, 1 wt% Da-1173, and 1 wt% ITX is applied for 3D printing to produce various models with smooth surfaces, high precision, and excellent flexibility.