西南林业大学学报2018，Vol.38Issue(1)：189-195,7.DOI:10.11929/j.issn.2095-1914.2018.01.030
反应条件对GUF树脂合成及动态热机械性能的影响研究
Effects of Reaction Conditions on Synthesis and Dynamic Thermo-mechanical Properties of GUF Resin
摘要
Abstract
Glyoxal (G) partially substituted for formaldehyde(F) and urea(U) to prepare GUF co-condensed resin. The effects of synthesis conditions on the basic properties of the GUF resins were studied. Dynamic thermo-mechanical analysis (DMA) was used to simulate the hot press process of the GUF-bonded plywood panels and in-vestigate the curing property of the GUF resins. Then the mechanical properties and formaldehyde emission of the plywood panels bonded with the GUF resins prepared under the optimized condition were studied. And these results indicated that the optimum synthesis condition of GUF resin was that glyoxal and urea react was 70-80℃ for 1 hour when its pH value was 4.0-5.0,then adding formaldehyde and react for 2 h when its pH value was 5.0-6.0 and nG:nU:nFis 0.7 : 1.0 : 0.7. Under the optimized conditions,the dry internal bond strength and formaldehyde e-mission of the GUF-bonded plywood panels could meet the relative requirement of China national standard GB/T 9846.3-2004,and the panels could be directly used indoor under dry conditions.关键词
树脂/动态热机械性能分析(DMA)/固化性能/胶合性能/甲醛释放Key words
resin/dynamic thermo-mechanical analysis (DMA)/curing property/bonding performance/formaldehyde emission分类
农业科技引用本文复制引用
邓书端,夏炎,张俊,杨燕,杜官本..反应条件对GUF树脂合成及动态热机械性能的影响研究[J].西南林业大学学报,2018,38(1):189-195,7.基金项目
国家林业局948项目(2014-4-40)资助 （2014-4-40）
云南省中青年学术和技术带头人后备人才培养项目(2017HB030)资助 （2017HB030）
西南林业大学科研启动基金项目(111426)资助 （111426）
国家自然科学基金项目(31260160)资助. （31260160）
