尿素用量对苯酚-尿素-甲醛树脂性能的影响  

Influence of urea addition on curing properties of phenol-ureaformaldehyde resin

作　　者：莫弦丰[1] 范东斌[1] 秦特夫[1] 储富祥[1] 

机构地区：[1]中国林科院木材工业研究所国家林业局木材科学与技术重点实验室,北京100091

出　　处：《木材加工机械》2014年第3期22-24,共3页Wood Processing Machinery

基　　金：国家自然科学基金项目;二价金属化合物对苯酚-尿素-甲醛共缩聚树脂结构形成的影响及调控机制(项目编号:31200441);十二五国家科技支撑计划课题;林木资源化学深加工关键技术研究及示范(项目编号:2012BAD24B04)

摘　　要：通过凝胶时间、贮存期及胶合强度研究了尿素用量对于苯酚-尿素-甲醛(PUF)树脂性能的影响。结果表明,随着尿素用量的增大,PUF树脂的凝胶时间逐渐降低,胶合强度则先增大后减小。当U/P摩尔比=0.65时,树脂的贮存期最短。综合考虑凝胶时间、贮存期和胶合强度对于PUF树脂性能的影响,当U/P摩尔比=0.5时,所制得的PUF树脂性能最优,并且其成本可降低30%左右。The influence of urea addition on gel time, shelf life and wet shear strength of phenol-urea-formaldehyde （PUF） resins were investigated. The results indicated that as the increase amount of urea, the gel time dropped steadily but the wet shear strength increased first and then decreased. When U/P molar ration was 0.65, the shelf life of PUF resin was the shortest. In this experiment, the optimal comprehensive performance of PUF resin with 30% cost of production off appeared when the U/P molar ration was 0.5.

关 键 词：尿素 苯酚摩尔比 苯酚-尿素-甲醛树脂 固化性能 胶合性能 

分 类 号：TS653.3[轻工技术与工程] TQ433[化学工程]