Lei Hong, Wu Zhigang, Cao Ming, Du Guanben
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, Yunnan, China.
Material Science and Technology College, Beijing Forestry University, Beijing 100083, China.
Polymers (Basel). 2016 Jul 12;8(7):256. doi: 10.3390/polym8070256.
To explain the reason why using phenol-formaldehyde (PF) resin improves the water resistance of soy-based adhesive, the performance of soy-based adhesive cross-linked with hydroxymethyl phenol (HPF) and the reaction between HPF and a common dipeptide -(2)-l-alanyl-l-glutamine (AG) being used as a model compound were studied in this paper. The DSC and DMA results indicated the reaction between HPF and soy-based adhesive. The soy-based adhesive cross-linked with HPF cured at a lower temperature than the adhesive without HPF. The former showed better mechanical performance and heat resistance than the latter. The ESI-MS, FT-IR and 13C-NMR results proved the reaction between HPF and AG. Because of the existence of branched ether groups in the C-NMR results of HPF/AG, the reaction between HPF and AG might mainly happened between hydroxymethyl groups and amino groups under a basic condition.
为了解释使用酚醛（PF）树脂提高大豆基胶粘剂耐水性的原因，本文研究了与羟甲基苯酚（HPF）交联的大豆基胶粘剂的性能以及HPF与用作模型化合物的常见二肽-（2）-L-丙氨酰-L-谷氨酰胺（AG）之间的反应。DSC和DMA结果表明了HPF与大豆基胶粘剂之间的反应。与不含HPF的胶粘剂相比，用HPF交联的大豆基胶粘剂在较低温度下固化。前者比后者表现出更好的机械性能和耐热性。ESI-MS、FT-IR和13C-NMR结果证明了HPF与AG之间的反应。由于HPF/AG的C-NMR结果中存在支链醚基，HPF与AG之间的反应可能主要发生在碱性条件下的羟甲基和氨基之间。
