聚乙烯亚胺改性尿素-乙二醛聚合物树脂性能研究  

Performance of Urea-Glyoxal Resin Modified with Poly Ethylenimine

作　　者：王凤 王辉[1,2] 杜官本[1,2] WANG Feng;WANG Hui;DU Guan-ben(Southwest Forestry University,Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Kunming 650224,Yunnan,China;Southwest Forestry University,Key Lab for Forest Resources Conservation and Utilization in the Southwest Mountains of China,Kunming 650224,Yunnan,China)

机构地区：[1]西南林业大学云南省木材胶黏剂及胶合制品重点实验室,云南昆明650224 [2]西南林业大学西南山地森林资源保育与利用教育部重点实验室,云南昆明650224

出　　处：《西北林学院学报》2020年第4期218-222,共5页Journal of Northwest Forestry University

基　　金：云南省农业联合专项(2018FG01-053)。

摘　　要：为了改善尿素-乙二醛(UG)的耐水及胶接性能,将聚乙烯亚胺(PEI)作为交联剂对UG进行改性,考察不同加入比例对树脂体系性能的影响,并借助仪器分析对树脂体系的固化特征、结构组成和形貌特征进行表征。结果表明,当PEI加入量为3%时,树脂所表现出的胶接强度及耐水性能最佳,而且PEI加入后通过有效官能团的交联反应,树脂体系的固化更加充分,形成的交联体系更加均匀和致密,树脂整体性能得到提升。In order to improve the water resistance and bonding strength of urea-glyoxal(UG),polyethyleneimine(PEI)was used as a crosslinking agent to modify the UG polymer.The effects of different addition ratios on the properties of the resin system were investigated.The curing characteristics,structure composition and morphology of the resin system were analyzed with various instrumental methods.The results indicated that the resin system with 3%PEI showed the best bonding strength and water resistance.Moreover,after PEI addition,the resin system cured more completely through the cross-linking reaction of effective functional groups,and the formed cross-linking system was more uniform and compact,the overall performance of resin was improved.

关 键 词：聚乙烯亚胺 尿素-乙二醛聚合物 胶接强度 固化特征 结构变化 

分 类 号：S789.2[农业科学—林学]