Thermal Degradation Kinetics of Urea-Formaldehyde Resins Modified by Almond Shells

Kexin Chen; Xue Cheng; Yuzhu Chen; Jinqiu Qi; Jiulong Xie; Xingyan Huang; Yongze Jiang; Hui Xiao

doi:10.1021/acsomega.1c03896

Thermal Degradation Kinetics of Urea-Formaldehyde Resins Modified by Almond Shells

ACS Omega. 2021 Sep 20;6(39):25702-25709. doi: 10.1021/acsomega.1c03896. eCollection 2021 Oct 5.

Authors

Kexin Chen^{1

2}, Xue Cheng^{1

2}, Yuzhu Chen^{1

2}, Jinqiu Qi^{1

2}, Jiulong Xie^{1

2}, Xingyan Huang^{1

2}, Yongze Jiang^{1

2}, Hui Xiao^{1

2}

Affiliations

¹ College of Forestry, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
² Wood Industry and Furniture Engineering Key Laboratory of Sichuan Provincial Department of Education, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.

Abstract

Almond shell-modified urea-formaldehyde resins (AUF) were prepared in this study. The optimal addition amount of almond shells was selected by formaldehyde emission and wet shear strength. The activation energy (E _a) values at different conversion rates and the reaction kinetics were estimated based on the Flynn-Wall-Ozawa method. The results indicated that almond shells can significantly reduce the formaldehyde emission and increase wet shear strength and thermal stability of the urea-formaldehyde resin adhesive. The optimal addition of almond shells is 3 wt %.