脲醛树脂胶粘剂晶体结构及其向非晶体转化研究进展  

Research progress on crystal structure and its amorphous transformation of urea-formaldehyde resin adhesive

作　　者：向阳[1] 仝迎芳 陈泰安 刘俊伟 郭蕴慧 刘亚青[1] Xiang Yang;Tong Yingfang;Chen Taian;Liu Junwei;Guo Yunhui;Liu Yaqing(Key Laboratory of Functional Nanocomposites of Shanxi Province,College of Materials Science and Engineering,North University of China,Taiyuan 030051,Shanxi,China)

机构地区：[1]中北大学纳米功能复合材料山西省重点实验室,山西太原030051

出　　处：《中国胶粘剂》2022年第9期55-60,65,共7页China Adhesives

摘　　要：在木材行业中,脲醛树脂是用量最大、应用最广泛的胶粘剂,但是脲醛树脂中的甲醛挥发会对人们的居住环境造成巨大危害。一种简单有效地减少甲醛排放的方法是合成低甲醛/尿素物质的量之比的脲醛树脂。然而,低物质的量之比的脲醛树脂在固化状态下会在线性分子之间形成强烈氢键,从而形成大量的结晶区,进一步使树脂的粘接性变差。本文介绍了近年来通过阻断氢键将结晶脲醛树脂转化为非晶态聚合物的研究进展,实现了提高树脂粘接性的同时降低甲醛挥发量的目的。Urea-formaldehyde resin is the most used and widely used adhesive in wood industry.However,formaldehyde volatilization in urea-formaldehyde resin will cause great harm to people’s living environment.A simple and effective method to reduce formaldehyde emission is to synthesize urea-formaldehyde resin with low formaldehyde/urea mass ratio.However,the low mass ratio of urea-formaldehyde resin will form strong hydrogen bonds between linear molecules during the curing state,thus a large number of crystallization zones are formed,which further deteriorates the bonding property of the resin.In this paper,the research progress in recent years on the transformation of crystalline urea-formaldehyde resin into amorphous polymer by blocking hydrogen bonds were introduced,and the purpose of improving the bonding property of the resin and reducing formaldehyde volatilization was achieved.

关 键 词：脲醛树脂 晶体 非晶体 胶粘剂 改性 

分 类 号：TQ430[化学工程]