碳纤维/环氧树脂预浸料固化动力学建模研究  

Dynamic Modeling of Curing Process of Carbon/Epoxy Prepreg

作　　者：高腾龙 余建虎 许英杰[2] GAO Tenglong;YU Jianhu;XU Yingjie(Chinese Flight Test Establishment,Xi′an 710089,China;School of Mechanical Engineering,Northwestern Polytechnical University,Xi′an 710072,China)

机构地区：[1]中国飞行试验研究院,西安710089 [2]西北工业大学机电学院,西安710072

出　　处：《机械科学与技术》2022年第7期1128-1135,共8页Mechanical Science and Technology for Aerospace Engineering

摘　　要：采用动态及等温的差示扫描量热法(DSC)对碳纤维/环氧树脂预浸料体系的固化过程进行了研究,分别建立了预浸料的玻璃化转变温度方程和固化动力学方程。通过n级反应动力学模型、自催化模型以及改进后的Kamal模型3种方法对预浸料体系固化动力学方程进行建模和对比,并通过等温DSC试验数据对模型进行验证。最终结果表明,预浸料的固化过程可以分为两个子反应,改进后的Kamal模型能够更为准确的描述该固化过程,拟合数据与动态和等温试验数据均能很好的吻合。In this paper,the dynamic models for carbon/epoxy prepreg system was studied by nonisothermal and isothermal differential scanning calorimetry(DSC).The glass transition temperature(T_(g))was firstly determined with DSC analysis as a function of curing degree of the samples.Subsequently,three kinetics mechanism equations consist of nth order reaction model,autocatalytic model as well as modified Kamal model were used to describe the curing process under dynamic condition.The modified Kamal model was finally adopted in view of the existence of two reactions in DSC curve.In addition,the prediction of modified Kamal model shows highly in accordance with the experimental via isothermal scans.

关 键 词：动力学模型 差示扫描量热法 碳纤维/环氧树脂预浸料 固化度 固化动力学方程 

分 类 号：TB332[一般工业技术—材料科学与工程]