木质素改性可发性甲阶酚醛树脂的固化动力学研究  

Kinetics Study of Foaming Phenolic Resin Modified with Lignin

作　　者：胡立红[1,2] 薄采颖[1] 周静[1] 梁兵川[1] 周永红[1] 王占军[1] 

机构地区：[1]中国林业科学研究院林产化学工业研究所,国家林业局林产化学工程重点开放性实验室,南京210042 [2]中国林业科学研究院林业新技术研究所,北京100091

出　　处：《高分子通报》2015年第12期98-103,共6页Polymer Bulletin

基　　金：国家林业局948资助项目(2013-4-12);国家基金资助项目(31470613);

摘　　要：以酚醛摩尔比1∶1.7,氧化降解木质素40%替代苯酚制备可发性甲阶酚醛树脂,采用DSC研究其等温条件不同温度下的固化动力学,并运用哈克流变仪研究该树脂的固化活性。结果表明,不同温度下树脂的固化反应焓变基本相同,随着固化温度的升高,固化速率得到较大提高;木质素改性可发性甲阶酚醛树脂的固化动力学方程:dα/dt=2.83×1017×exp(-125.27×103/RT)(1-α)0.84。由该方程模拟的等温聚合反应程度与时间的关系曲线与实际情况基本吻合。40% weight of phenol was substituted by oxidatively degradated lignin to formulate foaming phenolic resin at molar ratio of phenol to formaldehyde of 1 ： 1.7. Kinetics of the modified phenolic resin and its curing activity were studied by using isothermal differential scanning calorimeter（DSC） and HAAKE rheometer, respectively. The results showed that temperature had no significant effect on the enthalpy of curing process, and the velocity of curing increased with increasing temperature. The dynamic equation of curing process of the modified phenolic resin was da/dt=2.83×10^12×exp（-125.27×10^3/RT）（1-α）^0.84. The relationship between reaction and time deduced by the equation was almost the same as the real data.

关 键 词：木质素 甲阶酚醛树脂 差示扫描量热 固化动力学 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业]