酚脲醛发泡树脂的合成及性能表征.pdf

25 2 () Vol. 25 No. 2 2011 4 JOURNAL OF UN IVERSITY OF JINAN ( Sc.i and Tech) A r. 2011 : 1671- 3559( 2011) 02- 0162- 05 酚脲醛发泡树脂的合成及性能表征 刘 强, 刘 威, 周春华, 丰 瑛 ( , 250022) : 以 Ba( OH) 8H O 为催化剂, 采用分批法加入甲醛和脲素, 合成高邻位酚脲醛 ( UPF)预聚体并将其发泡采用 2 2 外谱图( IR)和扫描电镜( SEM )等手段对UPF树脂进行表征与分析, 研究其表观密度热导性和抗冲击性结果表明: 在相 同条件下, 增加脲素质量, UPF树脂的韧性隔热性明显提高当m (脲素) m (苯酚) = 0. 09时, UPF 发泡树脂的抗冲击性抗 压性和隔热性分别较m ( 脲素) m (苯酚) = 0. 03时提高了 28. 96% , 58. 15% 和 38. 87% , 羟甲基指数下降 20. 69% : 酚脲醛树脂; 脲素; 增韧 : TB34 : A Syn th esis and Characterization of Foam PhenolU reaF orm aldehyde L IU Q ai ng, L IU W e,i ZHO U Chu nhua, FENG Y ing ( School of Chem istry and Chem icalEngineering, University of Jinan, Jinan 250022, China) A bstrac t: A h ighortho re olym er of henolureaformaldehyde ( UPF) was synthes ized and foam ed by add ing form aldehyde and urea into the system in batches and choosing Ba( OH ) 8H O as catalyst. TheUPF w as characterized by IR and SEM, and its therm al 2 2 conductivity, com ressive strength and mi act toughnesswere also stud ied. The resu lts show that the tenacity and insu lation ofUPF in crease greatly w ith the increase of urea mass under the sam e conditions. When m Um P = 0. 09, com aredw ith m U mP = 0. 03, the mi act resistance, com ressive strength and insu lation erform ance are increased by 28. 96% , 58. 15% and 38. 87% , res ectively, and its hydroxymethyl index is decreased by 20. 69% . K ey w ord s: henolu reaform aldehyde resin; urea; toughening ( Phenolic Foams) , ,