摘要
以三(2-羟乙基)异氰尿酸酯(THEIC)、三聚氰胺(M)和甲醛(F)为原料合成了THEIC改性三聚氰胺甲醛(MFT)浸渍树脂。分析表明:MFT树脂液能够达到装饰纸浸渍液的国标(GB/T14732—2006)要求,MFT树脂的稳定性提高明显,n(F)/n(M)=1.85、n(THEIC)/n(F)=0.15的MFT树脂保持高度透明达24天,游离甲醛为0.05%;采用红外光谱表征MFT树脂,并解析了吸收峰归属官能团,分析表明:MFT树脂中THEIC环上的羰基吸收峰位置由1670.7 cm^(-1)变化为1680.9 cm^(-1),三聚氰胺环上的C=N吸收峰位置由1525.7 cm^(-1)裂分为1545.3和1504.0 cm^(-1)两个峰;^(13)C NMR定性和定量分析了MFT树脂的反应过程,结果表明三聚氰胺上氨基的羟甲基化为MFT合成过程的主要反应,并伴随着微量醚化反应(羟甲基之间、羟甲基与THEIC之间),反应产物以低聚物为主;加入THEIC后会使氨基和羟基的缩聚逆向进行发生部分水解,也说明了树脂储存期延长的原因。
The tris（ 2-hydroxyethyl） isocyanate（ THEIC） modified melamine formaldehyde（ MFT） impregnated resin was prepared with THEIC,melamine（ M） and formaldehyde（ F） as raw materials. The MFT resin could achieve the requirements of GB/T14732—2006. The stability of MFT resin was significantly improved with THEIC,as the n（ THEIC）/n（ F） was 10 % or 15 %.MFT resin（ n（ F）/n（ M） = 1. 85 and n（ THEIC）/n（ F） = 15 %） remained highly transparent up to 24 days,and its free formaldehyde was only 0. 05 %. Infrared characterization of MFT resin analysis showed that the absorption peaks of carbonyl functional groups of MFT resin changed to 1680.9 cm^-1 from 1670.7 cm^-1 in THEIC. The C=N absorption peak in melamine ring was 1525.7 cm^-1,and split up into two peaks（ 1545.3 and 1504.0 cm^-1） in MFT resin.^13C NMR qualitative and quantitative analysis the reaction process of the MFT resin showed that the hydroxymethyl of amino in melamine was the main reaction and accompanied with the etherification reaction（ between hydroxymethyl,hydroxymethyl and THEIC）. The main reaction products were oligomers. The joining of the THEIC made the reverse reaction of the condensation of amino and hydroxyl groups,which was hydrolysis reaction,and proved that the resin storage period increased.
作者
王荣兴
张祖新
陈日清
王春鹏
WANG Rongxing;ZHANG Zuxin;CHEN Riqing;WANG Chunpeng(Institute of Chemical Industry of Forest Products, CAF,National Engineering Lab. for Biomass Chemical Utilization,Key and Open Lab. of Forest Chemical Engineering, SFA ,Key Lab. of Biomass Energy- and Material, Jiangsu Province, Nanjing 210042, China;Research Institute of Forestry New Technology, CAF, Beijing 100091, China)
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2018年第2期126-132,共7页
Chemistry and Industry of Forest Products
基金
南京中医药大学中央级公益性科研院所基本科研业务费专项资金(CAFYBB2018ZB008)
