以4,4＇-（1-苯乙基）双酚（双酚AP）、正辛胺和甲醛为原料,采用溶剂法合成了一种新型双酚AP基苯并噁嗪单体,利用FT-IR和1H NMR对产物结构进行了表征,采用差式扫描量热仪（DSC）研究了苯并噁嗪单体的等温固化反应动力学.结果表明,该树脂体系的固化反应在反应前期为化学动力学控制,后期变为扩散控制占主导地位的反应,苯并噁嗪的固化过程为自催化和扩散控制.在反应后期实验数据和理论数据出现了偏差,通过将扩散因子引入到自催化模型中,改进后的自催化模型与实验数据相符.
A novel difunctional benzoxazine monomer was synthesized from the reaction of 4,4＇-（1-phenylethylidene） bisphenol（bisphenol-AP） with formaldehyde and n-octylamine.The chemical structures were identified by FT-IR and 1H NMR analyses.The curing kinetics was studied by isothermal differential scanning calorimetry（DSC）.The results revealed that the curing reaction of the bisphenol-AP-based benzoxazine was chemical kinetics control at the early stage,and the effect of the diffusion controll was much evident in later reaction stage.It was of autocatalyzed and diffusion controlled characteristics,there was some deviations between experimental data and autocatalytical data in the later stage.Diffusion factor was incorporated to empirical equation in order to predict the curing kinetic.The modified autocatalytic model showed good agreement with experimental results.
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