Zhang Yuchi, Fang Run, Xue Hanyu, Ye Yuansong, Chen Li, Xia Jianrong
College of Material and Chemical Engineering, Minjiang University, Fuzhou 350108, China.
Fujian Engineering and Research Center of New Chinese Lacquer Materials, Fuzhou 350108, China.
Polymers (Basel). 2024 Sep 25;16(19):2716. doi: 10.3390/polym16192716.
A natural extract, i.e., urushiol, was employed to effectively cross-link and modify commercial wet-cured polyurethane acrylic resin. Comprehensive characterization of the paint film was performed using techniques such as FTIR, SEM, and TGA. The results indicated that the incorporation of urushiol significantly increased the cross-linking density of the resin, which in turn enhanced the film-forming properties, mechanical strength, and thermal stability of the paint film. Additionally, the study discovered that under isothermal conditions, the dynamic moduli (G' and G″) of the paint film are related to the gel point frequency by a power law, aligning with the predictions of percolation theory. The application of the autocatalytic model has provided a novel approach to studying non-isothermal kinetic reactions, offering valuable insights for process optimization and further development of urushiol-based polyurethane.
一种天然提取物，即漆酚，被用于有效地交联和改性商业湿固化聚氨酯丙烯酸树脂。使用傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和热重分析（TGA）等技术对漆膜进行了全面表征。结果表明，漆酚的加入显著提高了树脂的交联密度，进而增强了漆膜的成膜性能、机械强度和热稳定性。此外，该研究发现，在等温条件下，漆膜的动态模量（G'和G″）与凝胶点频率通过幂律相关，这与渗流理论的预测一致。自催化模型的应用为研究非等温动力学反应提供了一种新方法，为基于漆酚的聚氨酯的工艺优化和进一步发展提供了有价值的见解。
