三聚氰胺改性脲醛树脂胶黏剂的固化性能
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摘要
以三聚氰胺为改性剂,通过碱-酸-碱工艺合成了低游离甲醛含量的三聚氰胺改性脲醛树脂胶黏剂,研究了NH_4Cl用量对三聚氰胺改性脲醛树脂固化性能及固化物结构的影响。结果表明:三聚氰胺质量分数为2.5%,游离甲醛质量分数为0.14%,且w(NH_4Cl)为2.0%时对改性脲醛树脂的固化效果最佳。X射线衍射测试证实了固化物内部晶态与非晶态共存;拉曼光谱分析从结构上进一步证实了固化物结构上的差异性。
Melamine modified urea-formaldehyde(MUF) resin adhesives in low free formaldehyde content were synthesized via alkali-acid-base process with melamine as modifier. The effects of the amount of NH_4Cl on the curing properties and cured structure of the modified resins were investigated. The results show that the optimally cured MUF resin is obtained when the mass fraction of melamine, free formaldehyde and NH_4Cl are 2.5%, 0.14%, and 2.0% respectively. The XRD results confirm that the crystalline and amorphous coexist in the cured products. Raman spectroscopy further confirms the structural differences among the cured products.
Melamine modified urea-formaldehyde(MUF) resin adhesives in low free formaldehyde content were synthesized via alkali-acid-base process with melamine as modifier. The effects of the amount of NH_4Cl on the curing properties and cured structure of the modified resins were investigated. The results show that the optimally cured MUF resin is obtained when the mass fraction of melamine, free formaldehyde and NH_4Cl are 2.5%, 0.14%, and 2.0% respectively. The XRD results confirm that the crystalline and amorphous coexist in the cured products. Raman spectroscopy further confirms the structural differences among the cured products.
引文
[1]游长江,方旻.脲醛树脂胶黏剂及其发展状况[J].广州化学,2009,34(2):48-53.
[2]曹军,朱丽滨,顾继友.木材胶接用三聚氰胺改性脲醛树脂胶黏剂性能研究[J].化学与粘合,2009,31(4):1-4.
[3]高振忠,甘文玲.三聚氰胺改性脲醛树脂胶黏剂研究进展[J].中国胶黏剂,2016,25(6):52-56.
[4]白雪岩.预油漆纸用三聚氰胺改性脲醛树脂的研究[D].哈尔滨:东北林业大学,2004.
[5]顾继友,林昌镇.三聚氰胺改性脲醛树脂胶黏剂在中密度纤维板上的应用研究[J].林产工业,2002,29(1):23-26.
[6]曾灵,崔举庆,韩书广,等.三聚氰胺添加方式对三聚氰胺改性脲醛树脂胶合纤维板性能的影响[J].东北林业大学学报,2015,43(4):134-136.
[7]朱丽滨.低甲醛释放脲醛树脂固化反应历程研究[D].哈尔滨:东北林业大学,2005.
[8]董耀辉.低摩尔比脲醛树脂固化与性能的研究[D].北京:北京林业大学,2011.
[9]顾继友.胶黏剂与涂料[M].北京:中国林业出版社,1999:47-49.
[10]顾继友,文美玲,朱丽滨,等.三聚氰胺共聚改性脲醛树脂固化性能研究[J].中国胶黏剂,2015,24(2):20-24.
[11]Park B D,Causin V.Crystallinity and domain size of cured urea-formaldehyde resin adhesives with different formaldehyde urea mole ratios[J].Eur Polym J,2013,49(2):532-537.
[12]Levendis D,Pizzi A,Ferg E.The correlation of strength and formaldehyde emission with the crystalline/amorphous structure of UF resins[J].Holzforschung-Inter J Biol,Chem Phy Technol Wood,1992,46(3):263-269.
[13]Scheepers M L,Gelan J M,Carleer R A,et al.Investigation of melamine-formaldehyde cure by Fourier transform Raman spectroscopy[J].Vib Spectrosc,1993,6(1):55-69.
[14]Shiau D W,Smith E.Low formaldehyde emission ureaformaldehyde resins containing a melamine additive:US,4536245A[P].1985-08-20.
[2]曹军,朱丽滨,顾继友.木材胶接用三聚氰胺改性脲醛树脂胶黏剂性能研究[J].化学与粘合,2009,31(4):1-4.
[3]高振忠,甘文玲.三聚氰胺改性脲醛树脂胶黏剂研究进展[J].中国胶黏剂,2016,25(6):52-56.
[4]白雪岩.预油漆纸用三聚氰胺改性脲醛树脂的研究[D].哈尔滨:东北林业大学,2004.
[5]顾继友,林昌镇.三聚氰胺改性脲醛树脂胶黏剂在中密度纤维板上的应用研究[J].林产工业,2002,29(1):23-26.
[6]曾灵,崔举庆,韩书广,等.三聚氰胺添加方式对三聚氰胺改性脲醛树脂胶合纤维板性能的影响[J].东北林业大学学报,2015,43(4):134-136.
[7]朱丽滨.低甲醛释放脲醛树脂固化反应历程研究[D].哈尔滨:东北林业大学,2005.
[8]董耀辉.低摩尔比脲醛树脂固化与性能的研究[D].北京:北京林业大学,2011.
[9]顾继友.胶黏剂与涂料[M].北京:中国林业出版社,1999:47-49.
[10]顾继友,文美玲,朱丽滨,等.三聚氰胺共聚改性脲醛树脂固化性能研究[J].中国胶黏剂,2015,24(2):20-24.
[11]Park B D,Causin V.Crystallinity and domain size of cured urea-formaldehyde resin adhesives with different formaldehyde urea mole ratios[J].Eur Polym J,2013,49(2):532-537.
[12]Levendis D,Pizzi A,Ferg E.The correlation of strength and formaldehyde emission with the crystalline/amorphous structure of UF resins[J].Holzforschung-Inter J Biol,Chem Phy Technol Wood,1992,46(3):263-269.
[13]Scheepers M L,Gelan J M,Carleer R A,et al.Investigation of melamine-formaldehyde cure by Fourier transform Raman spectroscopy[J].Vib Spectrosc,1993,6(1):55-69.
[14]Shiau D W,Smith E.Low formaldehyde emission ureaformaldehyde resins containing a melamine additive:US,4536245A[P].1985-08-20.