Non-Isothermal Curing Kinetics of a Modified Benzoxazine Resin System Suitable for Hot-Melt Prepreg Preparation

• Published in: Solid state phenomena Vol. 266; pp. 128 - 134
• Main Authors: Jiang, Wen Ge, Zang, Qian, Zhou, Yu, Zhang, Dong Xia, Fan, Meng Jin, Shang, Cheng Yuan, Luan, Yi Hao
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 02.10.2017
• Subjects: Activation energy; Benzoxazines; Computer simulation; Curing; Flame retardants; Mathematical models; Reaction kinetics; Reaction mechanisms; Resins; Benzoxazine Resin System; DSC; Non-Isothermal Curing Kinetics
• ISSN: 1012-0394; 1662-9779; 1662-9779
• DOI: 10.4028/www.scientific.net/SSP.266.128

Non-isothermal DSC was used to study the cure kinetics of a flame-retardant benzoxazine resin system (BZ501-1) suitable for hot-melt prepreg preparation. The variation of activation energy with conversion for BZ501-1 system was investigated by using Flynn-Wall-Ozawa method, and the average value of activation energy obtained from this method was 100.5 kJ/mol. After that, the model function that depends on the reaction mechanism for the non-isothermal cure of BZ501-1 system was determined by Málek method, and the result showed that Šesták-Berggren model can generally simulate well the reaction rate. Finally, the isothermal curing behavior of BZ501-1 at 200 °C was predicted by using the obtained rate equation, and the result showed that there was no significant difference between the experiment conversions and the predicted ones. The predicted results at different temperatures indicated that the curing rate increased gradually with increasing the curing temperature.