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林产化学与工业 ›› 2009, Vol. 29 ›› Issue (3): 63-68.

• 研究报告 • 上一篇    下一篇

碱性环境下苯酚-尿素-甲醛共缩聚树脂结构形成研究

雷洪1, 杜官本1, PIZZI Antonio2, 赵伟刚1, 李琴3, 方群1, 赵超超1   

  1. 1. 西南林学院, 木质科学与装饰工程学院, 云南 昆明 650224;2. ENSTIB, UniversityofNancy1, Epinal88000, France;3. 浙江省林业科学研究院, 浙江 杭州 310023
  • 收稿日期:2008-06-10 修回日期:1900-01-01 出版日期:2009-06-30 发布日期:2009-06-30
  • 通讯作者: 杜官本,教授,博士生导师,主要研究方向:木材胶黏剂化学及木质复合材料;E-mail:guanben@swfc.edu.cn。

Structural Progressing of Phenol-urea-formaldehyde Resin under Alkaline Condition

LEI Hong1, DU Guan-ben1, PIZZI Antonio2, ZHAO Wei-gang1, LI Qin3, FANG Qun1, ZHAO Chao-chao1   

  1. 1. Department of Wood Science and Interior Decoration, Southwest Forestry College, Kunming 650224, China;2. ENSTIB, University of Nancy 1, Epinal 88000, France;3. Forestry Research of Zhejiang Province, Hangzhou 310023, China
  • Received:2008-06-10 Revised:1900-01-01 Online:2009-06-30 Published:2009-06-30

摘要: 为了了解碱性环境中苯酚-尿素-甲醛(PUF)共缩聚树脂结构形成规律,为PUF树脂结构控制提供依据,使用13C NMR 表征,采用分次加入苯酚、甲醛和尿素的技术路线,定量分析了PUF树脂合成过程中各种官能团的变化和聚合物分子链的构成。结果表明,碱性环境中各种加料方式合成的PUF树脂初聚物具有十分相近的化学结构, PUF树脂也具有十分相近的化学结构,但结构组分存在差异,在原料物质的量之比一定的条件下,最终反应进程基本接近。甲醛分次加入,减少了醚类的生成,有利于简化反应进程。初聚物的热机械性能分析表明不同加料方式对酚醛树脂固化性能无显著影响。

关键词: 苯酚-尿素-甲醛共缩聚树脂, 碱性环境, 结构

Abstract: To find the rule of structural progressing of phenol-urea-formaldehyde (PUF) resin prepared under alkaline condition and to provide theoretical basis for PUF preparation, quantification of main functiongroups and identification of different linkages formed in PUF prepolymers were analyzed by 13CNMR spectroscopy when phenol, formaldehyde and urea were charged by several times during the preparation of PUF. Results showed that PUF prepolymers obtained by different charging methods showed similar chemical structure with almost same type of linkage but showed difference in structural constitution. Under definite materials' ratio in this experiment, the final reaction progresses of synthesizing PUF resins were almost similar. The charging of formaldehyde by several times could decrease the formation of ether and was in favor of simplifying the reaction. Results of thermo-mechanical analysis (TMA) exhibited that curing performance of PUF prepolymers were not much affected by different charging methods.

Key words: phenol-urea-formaldehyde (PUF) resin, alkaline condition, structure

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