Thermal Curing of Benzoxazine Blends from Cardanol- Furfurylamine and Diphenolic Acid-Aniline

International Conference on Advanced Manufacturing and Industry Applications

机械制造;工业技术

Viet, C.X.^1 ; Lan, D.N.U.^2 ; Hung, T.K.^1

Department of Polymer Materials, Ho Chi Minh University of Technology, Viet Nam^1

School of Materials Engineering, University Malaysia Perlis, Malaysia^2

关键词: Carboxyl groups;    Cashew nut shell liquid;    Curing temperature;    Fourier transform infrared;    Furfuryl amines;    High thermal stability;    Lower temperatures;    Polybenzoxazine;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/429/1/012068/pdf
DOI  :  10.1088/1757-899X/429/1/012068

学科分类：工业工程学

来源: IOP

【 摘 要 】

Cardanol-furfurylamine benzoxazine (CFB) is a bio-based resin thanks to cardanol as a by-product of cashew nut shell liquid. Polybenzoxanize obtained from CFB exhibited high thermal stability, however, it requires a high thermal curing temperature. This research was aimed to reduce the curing temperature of CFB by blending it and diphenolic acid-aniline benzoxazine (DAB). The blend molar ratio of CFB:DAB was 4:1. Under thermal curing, carboxyl group in DAB was degraded and accelerated ring-opening polymerization of CFB/DAB blend so that no catalyst was used. Different curing temperatures of CFB/DAB blend was investigated. Results from fourier transform infrared (FTIR) and differential scanning calorimetry (DSC) proved that the ring-opening initiated at 115.2 °C for DAB, 141.6 °C for blend and 206.2 °C for CFB. It proved that CfB/DAB blend could start thermal curing at an obvious lower temperature. Moreover, polybenzoxazine synthesized from CFB/DAB blend exhibited good thermal stability compared to DAB-polybenzoxazine and obtained higher char yields compared to CFB-polybenzoxazine.