林产化学与工业2023，Vol.43Issue(6)：89-97,9.DOI:10.3969/j.issn.0253-2417.2023.06.012
三聚氰胺-尿素-乙二醛共缩聚树脂的制备、表征与性能分析
Preparation,Characterization and Performance Analysis of Melamine-Urea-Glyoxal Co-condensed Resin
摘要
Abstract
This paper used non-volatile glyoxal(G)to replace formaldehyde to react with melamine(M)and urea(U)to prepare melamine-urea-glyoxal(MUG)co-condensed resins,at room temperature with the molar ratio of the raw material of U and G was 0.30:1.0,and with the dosage of M was 13.86,17.64,21.42 and 25.20 g,respectively.The basic properties,curing properties and bonding properties of the MUG resins were determined and analyzed.The structure of the resin was characterized by Fourier transform infrared spectroscopy(FT-IR),mass spectrometry(MS)and nuclear magnetic resonance carbon spectroscopy(13 C NMR).The results showed that the solid content and viscosity of MUG resins were greatly affected by the molar ratio of raw materials,which increased with the increase of M content.The MUG resin mainly contained N—H,O—H,C=O,C—O,C=N and other functional groups,and the main infrared absorption peaks of MUG resin with different molar ratios of raw materials did not change significantly.The possible reaction mechanism was deduced according to the molecular fragments,proving the co-polycondensation reaction M,U and G in the system.When the amount of melamine added was 21.42 g,the curing temperature of the resin was lower and the storage modulus was higher.For the plywood fabricated by the as prepared resin,the dry bonding strength,wet strength cold water for 24 h and with hot water for 3 h were 2.51,1.29 and 0.85 MPa,respectively.关键词
三聚氰胺-尿素-乙二醛共缩聚树脂/物质的量比/反应机理/胶接强度Key words
melamine-urea-glyoxalco-condensed resins/molar ratio/reaction mechanism/bonding strength分类
化学化工引用本文复制引用
姜鑫,王德龙,汪进文,杜官本,邓书端..三聚氰胺-尿素-乙二醛共缩聚树脂的制备、表征与性能分析[J].林产化学与工业,2023,43(6):89-97,9.基金项目
云南省万人计划"产业技术领军"人才专项(80201408) （80201408）
国家自然科学基金资助项目(31860188) （31860188）
云南省大学生创新创业训练项目(无编号) （无编号）
