摘要
用13CNMR定量分析跟踪研究了两种不同合成路线中苯酚-尿素-甲醛共缩聚树脂(PUF)结构形成过程,比较了3种PUF树脂的结构构成。研究发现树脂制备过程中的酸性环境导致脲醛树脂初聚物含量增加以及尿素与苯酚之间的共缩聚增加;合成反应初期的介质环境对羟甲基酚的形成有着决定性的影响;合成过程中酸性环境所处阶段不同,最终树脂结构出现差异。
The progresses of structure formation of phenol-urea-formaldehyde （PUF） resin prepared in two different routes were followed by ^13C NMR which allowed quantitative analysis of the main function groups in the PUF prepolymers. The structures of three different PUF resins were compared too. The results showed that the medium condition at the initial stage of the preparation had decisive effects on the formation of phenol methylol. Acidic condition caused the increase of urea-formaldehyde prepolymer and co-condensed PUF resin. The final structures of PUF resins were different when acidic condition was in different stage during the preparation.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2009年第1期73-78,共6页
Chemistry and Industry of Forest Products
基金
教育部新世纪优秀人才支持计划(NCET-06-0825)
云南省应用基础研究重点基金(2008CC014)
