摘要
通过13C-NMR分析二乙二醇和己内酰胺改性的三聚氰胺甲醛树脂(CMF)的结构及聚合机理,结合耐磨颗粒Al2O3的表面改性研究,探讨将其应用于制备液体耐磨纸的可行性。结果表明:二乙二醇和己内酰胺可以与羟甲基三聚氰胺上的活泼氢原子反应,生成由次甲基键和醚键连接的聚合物。己内酰胺在反应过程中存在开环反应,水解成氨基羧酸后与羟甲基三聚氰胺发生酯化反应,由其改性的CMF树脂的贮存期达15 d以上;使用1.5%的复合偶联剂改性Al2O3(YB-501-Al2O3),按CMF树脂、YB-501-Al2O3、羧甲基纤维素钠(CMC)的质量分数分别为84.5%、15.0%、0.5%,制造Al2O3添加量为45 g/m2的耐磨装饰纸,在热压温度200℃、压力2.5 MPa和时间60 s的条件下制成的强化木地板耐磨转数可达4 700 r,满足国家标准GB/T 18102—2007中家用Ⅱ级的使用要求。
We examined the mechanism of polymerization and structure of the CMF resins by 13C-NMR spectroscopy .Combining with modification of Al2O3 surface, we obtained the final wear-resistant resin for decorative paper .The diethylene glycol and caprolactam could react with the active hydrogen of methylol melamine , and generate the polymer linkage of -CH2-and CH2-O-CH2.The esterification reaction occurred between methylol melamine and amino acid after the caprolactam was ring-opening and hydrolyzed into amino acid .The storage period of this kind of CMF resin were more than 15 days.By FTIR analysis, Al2O3 modified by coupling agent （YB-501） of 1.5%was the optimum and the ability of wear resistance was also good.The optimal dosages of liquid resin were 84.5%of CMF resin with the amount of 15%modified Al2O3, the dispersant concentration （ CMC） was 0.5%, and the curing agent PTSA （ based on the mass of CMF resin ） was 0.5%.Un-der the hot-press temperature of 200℃, hot-pressure of 2.5 MPa and 60 s, the covered panel had a good apparent , and there was no dried flowers and cracks on the surface of laminate flooring .Its wear-resistance was up to 4 700 r in the re-quirements of Chinese national standard GB/T 18102-2007 of product used at home with gradeⅡ.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2014年第8期115-119,130,共6页
Journal of Northeast Forestry University
基金
国家自然科学基金(31370567)
江苏省自然科学基金(BK20131427)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
三聚氰胺树脂
二乙二醇
己内酰胺
液体耐磨
Melamine-formadehyde resin
Diglycol
Caprolactam
Liquid wear-resistant
