摘要为了降低酚醛树脂木材胶粘剂成本，延长贮存期，改善面粉在木材胶的分散性。本论文主要研究不同的工艺条件，包括苯酚、甲醛、尿素的摩尔比，尿素的添加方式等条件对改性酚醛树脂的胶合性能、粘度、固含量、贮存期的影响；同时添加一定量的三聚氰胺、吐温80、有机硅（KH550）改性苯酚-尿素-甲醛共缩聚树脂的胶合性能；以13 C-核磁共振分析（NMR）和差示扫描量热法（DSC）为手段，对产物结构和物理性能进行表征。结果表明，随着尿素加入量的增加，固体含量升高，粘度和胶合强度降低；本研究所设计的以苯酚、尿素和甲醛为原料而合成苯酚-尿素-甲醛共缩聚树脂，这种方法是可行的；三聚氰胺的加入降低了树脂的粘度，三聚氰胺添加量的增加，木材胶成品的粘度变化不大，湿状剪切强度增大，贮存期变短，但是变化不大，固含量逐渐增大；而吐温80和KH550的加入使胶合强度减小。关键词：苯酚-尿素-甲醛树脂 共缩聚 胶合性能 改性剂8300
毕业设计说明书（论文）外文摘要
Title Synthesis and Application of Modified phenolic
resin timber agent
Abstract
In order to reduce the cost of the phenolic resin wood adhesives, to extend the storage period, and to improve the dispersion of the flour in wood glue. This paper studied the different process conditions, including zhe molar ratio of phenol, formaldehyde, urea and urea add mode conditions on zhe impact of the gluing properties of the modified phenolic resin, viscosity, solid content and the storage life; Adding a certain amount of melamine, Tween 80, and silicone (of KH550) to modified phenol - urea - formaldehyde condensation resin glue performance;By means of 13 C-nuclear magnetic resonance (NMR) and differential scanning calorimetry (DSC), the product structure and physical properties were characterized. The results show that the solids content elevated, viscosity and shear strength wet- -like decreased with the increasing in the amount of urea; This study design as a starting point for implementation of the biosynthetic pathway of phenol - urea - formaldehyde condensation of phenol, urea and formaldehyde monomers is feasible; Melamine improved the gluing properties of the resin, and Tween 80 and KH550 join result is not satisfactory, needs further study.
Keywords wood adhesives phenol-urea-formaldehyde co-condensate resin modified
目 次
1 绪论 1
1.1 人造板行业发展状况 1
1.2 人造板用胶粘剂的发展方向与应用前景 1
1.2.1 木材胶粘剂的主要品种 1
1.2.2 酚醛树脂的发展和应用前景 2
1.3 研究目的和方法 3
1.4 主要研究内容 3
1.4.1 改性酚醛树脂木材胶粘剂工艺条件研究 3
1.4.2 提高酚醛树脂胶粘剂耐水性及贮存稳定性的改性剂及改性方法研究 6
2 实验原理及方案 8
2.1 热固性酚醛树脂的反应原理 8
2.6.1 甲阶酚醛树脂 8
2.6.2 乙阶酚醛树脂 9
2.6.3 丙阶酚醛树脂 10
2.6.4 尿素改性酚醛树脂胶粘剂反应原理 10
2.2 合成工艺的研究 11
2.2.1 不同苯酚/甲醛物料比例的研究 11
2.2.2 催化剂种类及用量的研究 12
2.2.3 反应时间和反应温度研究 12
2.2.4 合成苯酚—尿素—甲醛共缩聚树脂的研究 13
2.3 胶合板热压成型条件 14 改性酚醛树脂胶粘剂的合成与应用:http://www.751com.cn/cailiao/lunwen_6738.html