林产化学与工业2018，Vol.38Issue(1)：101-109,9.DOI:10.3969/j.issn.0253-2417.2018.01.015
苯酚-尿素-甲醛树脂的合成和机理研究
Synthesis of Phenol-urea-formaldehyde Resin and Its Reaction Mechanism
摘要
Abstract
Phenol-urea-formaldehyde(PUF) resin wood adhesives with different amount of urea instead of phenol were synthesized. and a simple phenol-urea-formaldehyde resin formulation and synthesis technology was investigated. The bonding strength of the five PUF pressed plywoods with different dosage of urea all met the requirements of classⅠ. The cure, decomposition and reaction processes of PUF resin were characterized by13C NMR and TG respectively.13C NMR showed the content of hydroxymethyl,methylene and methylene ether bonds in PUF resin varied with the amount of urea and the reaction time during the preparation. Furthermore, the reaction mechanism of PUF synthesis was analyzed and the heat resistance of the synthesized PUF resin was characterized by TG. The results showed that the synthesis process of PUF resin was the electrophilic addition of formaldehyde and the thermostability firstly increased and subsequently reduced.关键词
尿素改性酚醛树脂/木材胶黏剂/反应机理/残炭率/胶合强度Key words
urea modified phenolic resin/wood adhesive/reaction mechanism/residual carbon rate/bonding strength分类
化学化工引用本文复制引用
王荣兴,张祖新,陈日清,赵临五,王春鹏,储富祥..苯酚-尿素-甲醛树脂的合成和机理研究[J].林产化学与工业,2018,38(1):101-109,9.基金项目
"十二五"国家科技支撑计划资助(2015BAD14B03) （2015BAD14B03）
木竹产业技术创新战略科研计划课题资助(TIAWBI201506) （TIAWBI201506）
