摘要
以刺五加药渣为原料,通过碱法得到刺五加药渣碱法木质素并进行羟甲基化改性,与酚醛树脂按比例混合常温搅拌,得到木质素酚醛树脂。采用差示扫描量热法对木质素酚醛树脂固化动力学进行研究,其固化反应的表观活化能为134.6,反应级数为0.95,固化反应的To、Tp和Tf值分别为99.5℃、121.5℃和141.5℃。木质素酚醛树脂固化后,红外谱图l210～l240cm-1,l020~l032cm-1处的吸收峰强度均降低,说明木质素酚醛树脂固化反应主要有两个途径：羟基之间的缩合反应;芳环上活泼氢与羟基之间缩合反应。
The soda lignin from dregs of Acanthopanax was extracted with sodium hydroxide and modified by formaldehyde hydroxymethyl,which was mixed with phenolic resin by stirring at room temperature to obtain ligninphenolic compound adhesive.Differential scanning calorimetry（DSC）was used to study the curing behavior of lignin-phenolic resin.The curing reaction activation energy and reaction order of lignin-phenolic resin were 134.6 and 0.95,through the adhesive curing kinetics.The characteristic temperature To,Tp and Tf of curing reaction values were 99.5℃,121.5℃ and 141.5℃.The absorption peak intensity of IR spectra decreased at 1210~1240cm-1,1020~1032cm-1 after lignin-phenolic resin curing,which indicated that there were two main ways during ligninphenolic resin curing reaction： a condensation reaction between the hydroxyl groups and between active hydrogen on the aromatic ring and hydroxyl groups.
出处
《化学工程师》
CAS
2013年第8期18-21,共4页
Chemical Engineer
基金
"十二五"国家科技计划课题2012BAD24B04
