摘要
以尿素和三聚氰胺作为酚醛树脂改性单体制备苯酚-三聚氰胺-尿素-甲醛(PMUF)树脂胶黏剂,研究甲醛、苯酚、尿素、三聚氰胺及氢氧化钠用量对PMUF树脂胶黏剂性能的影响,并采用DSC和13C-NMR对其进行表征。结果表明:PMUF树脂游离甲醛含量低,能满足耐水、耐候性能要求较高的人造板产品的生产。当甲醛、苯酚、尿素、三聚氰胺、NaOH的摩尔比为3.1∶1∶0.7∶0.3∶0.5时胶黏剂性能最佳,其最佳固化温度为135.5℃。
Phenol-melamine-urea-formaldehyde（PMUF） resin adhesive was prepared by adopting urea and melamine as the modified monomer for phenol formaldehyde resin. The effects of the molar ratio of folmaldehyde, phenol, urea, melamine and sodium hydroxide on performarlce of PMUF resin adhesive were studied. It was characterized by DSC and ^13C-NMR. The results indicate that the PMUF can reduce the content of free formaldehyde, and it can make wood-based panel with high water resistance and weatherability. The properties of PMUF resin adhesive are best when the molar ratio is 3.1 ： 1 ： 0.7 ： 0.3 ： 0.5 （formaldehyte ： phenol ： urea ： melamine ： NaOH） and the best curing temperature is 135.5℃.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2009年第8期124-128,共5页
Scientia Silvae Sinicae
基金
广东省农业攻关项目(2007B020703001)
