浙江农林大学学报2016，Vol.33Issue(2)：300-305,6.DOI:10.11833/j.issn.2095-0756.2016.02.016
高质量分数甲醛增强冷固型三聚氰胺-尿素-甲醛树脂性能
Cold-setting MUF resin adhesive prepared with concentrated fomaldehyde
摘要
Abstract
To research t he influence of high formaldehyde concentrations on synthetic copolycondensation of melamine urea-formaldehyde (MUF) resin performance, resins from a high formaldehyde concentration (MUF-H) of 50% and standard concentration (MUF) of 37% were compared. Then glulam was prepared at room temperature (20℃) to test its physical and mechanical properties. Also, structural characteristics and thermal mechanical properties of resins were studied using 13C-NMR (nuclear magnetic resonance), Fourier transform infrared (FT-IR) spectroscopy, and Dynamic Mechanical Analysis (DMA). Results showed that the high formaldehyde concentrations enhanced solid content and viscosity of the MUF-H adhesive, shortened curing time, and improved shear strength for 60%. The DMA test results revealed that the MUF-H resin also greatly enhanced the adhesive elastic modulus. Additionally, the 13C-NMR analysis indicated that the methylene and ether bonds of MUF-H resin ware higher than MUF. Thus, the MUF-H system had a higher reaction rate and crosslinking degree which improved the mechanical properties of the resin.关键词
林业工程/高质量分数甲醛/共缩聚合成三聚氰胺-尿素-甲醛/常温固化/物理力学性能Key words
forest engineering/high concentration of formaldehyde/MUF/room temperature curing/physical and mechanical properties分类
化学化工引用本文复制引用
席雪冬,雷洪,杜官本,吴志刚,曹明,廖晶晶..高质量分数甲醛增强冷固型三聚氰胺-尿素-甲醛树脂性能[J].浙江农林大学学报,2016,33(2):300-305,6.基金项目
国家林业局引进国际先进农业科学技术计划（“948”计划）项目（2013-4-13）；国家林业公益性行业科研专项（201304505）；云南省中青年学术带头人后备人才 （）
