固废脲醛树脂热解产物特征及树脂化性能评价  

Characteristics of pyrolysis products and resinization performance evaluation of solid waste urea-formaldehyde resin

作　　者：杨宇 罗新纪 王辉[1] YANG Yu;LUO Xinji;WANG Hui(Southwest Forestry University,Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products,Kunming 650224,China)

机构地区：[1]西南林业大学云南省木材胶粘剂及胶合制品重点实验室,云南昆明650224

出　　处：《粘接》2025年第5期30-33,共4页Adhesion

基　　金：云南省科技厅青年人才项目(项目编号:YNWR-QNBJ-2020-142)。

摘　　要：实际生产中,因人为或偶然因素常常会产生不同比例的固废脲醛树脂。为实现该废弃树脂的资源化利用,减少环境污染,基于脲醛树脂的可逆反应特征,采用热处理法进行降解处理,并分析了热解产物的特征及其树脂化应用潜质。结果表明,以乙二醛为热处理溶剂可降解得到外观为深黄色的酸性粘稠均匀溶液,其固体含量为54~58%,黏度随着乙二醛用量的不同分布为70~171 mPa·s,结构分析发现其具有与普通脲醛树脂类似的基团组成和分子量分布特征。进一步的树脂化应用评估表明,直接作为树脂使用性能无法满足标准要求,经过增粘处理后可以获得理想的胶接强度和耐水性。In actual production,due to artificial or accidental factors,different proportions of solid waste urea-formaldehyde resin are often produced.In order to realize the resource utilization of the waste resin and reduce environmental pollution,based on the reversible reaction characteristics of urea-formaldehyde resin,the degradation treatment method was carried out by heat treatment,and the characteristics of the pyrolysis product and its resin application potential were analyzed.The results showed that glyoxal was used as the heat treatment solvent to degrade the acidic viscous uniform solution with a dark yellow appearance,with a solid content of 54~58%and a viscosity of 70~171 mPa·s with different amounts of glyoxal.Structural analysis showed that it had similar group composition and molecular weight distribution characteristics as ordinary urea-formaldehyde resins.Further evaluation of resinization applications showed that the performance of direct use as a resin could not meet the standard requirements,and the ideal bonding strength and water resistance could be obtained after tackifying treatment.

关 键 词：固废脲醛树脂 降解处理 再生树脂 胶合板 

分 类 号：TQ323.3[化学工程—合成树脂塑料工业]