期刊论文

Effects of moisture content on curing characteristics of low molecular mass melamine-urea-formaldehyde (MUF) resin by differential scanning calorimetry (DSC) method

Xu, K.

中文

北京林业大学学报

1000-1522

2021

43

1

119-126

10.12171/j.1000-1522.20200317

国家自然科学基金项目（31800479）； 湖南省自然科学基金项目（2020JJ5978）； 湖南省教育厅优秀青年项目（19B592）； 中南林业科技大学***科研启动基金项目（2019YJ015）；

本校为第一机构

【目的】探究水分含量对低分子量三聚氰胺脲醛（MUF）树脂溶液固化特性的影响,为阐明树脂浸渍材在不同干燥阶段、不同空间层位中的树脂固化特性提供数据支撑。【方法】以实验室自制的MUF树脂溶液为研究对象,将其稀释成20%、30%、40%、50%后进行升温差示扫描量热测试（DSC）,通过外推法消除升温速率对峰顶温度的影响,拟合求解其最佳固化温度,定性阐述水分含量对MUF树脂固化特性的影响,并运用Kissinger微分法和Flynn-Wall-Ozawa积分法计算20%、30%、40%、50%树脂溶液固化反应的表观活化能,定量分析水分对树脂固化特性的影响。【结果】随着MUF树脂溶液质量分数的降低,DSC曲线中峰顶温度整体上呈现向...

Objective: In order to clarify the resin curing characteristics of the resin impregnated wood in different spatial layers during different drying stages, the effects of moisture content on resin solution curing process were studied. Method: The melamine-urea-formaldehyde (MUF) resin solution prepared in the laboratory was diluted to 20%, 30%, 40% and 50%, respectively. Then, they were analyzed by differential scanning calorimetry (DSC) method. Without the effect of heating rate, the optimum curing temperature was obtained by extrapolation metho...