国产T800级高韧性环氧树脂基预浸料的TTT图绘制  

Time-temperature-transformation(TTT)diagram of a domestic T800 carbon fiber epoxy prepreg

作　　者：何靓 俆小伟 胡大豹 雷杨 李尧 HE Liang;XU Xiaowei;HU Dabao;LEI Yang;LI Yao(Research Laboratory of Manufacturing Technology of Composite Materials,Composite Material Fabrication Factory,AVIC Xi'an Aircraft Industry Group Company Ltd.,Xi'an 710089,China)

机构地区：[1]中航西安飞机工业集团股份有限公司复合材料厂复合材料制造技术研究实验室,西安710089

出　　处：《复合材料科学与工程》2023年第5期25-31,共7页Composites Science and Engineering

基　　金：国家重点研发计划(2021YFB3401700)。

摘　　要：预浸料的固化动力学研究及TTT图绘制可指导相关制品的成型工艺设计及优化,保证制品的最佳力学性能。以国产T800级高韧性AC531环氧树脂基预浸料为对象,采用DSC测量法研究了其固化反应动力学,并根据固化反应特点,拟合得到了固化反应动力学的自催化模型表达式;针对预浸料的相转变行为,测试并拟合得到了玻璃化转变温度与固化度之间的关系,通过线性回归分析得到了凝胶时间与温度的关系式;绘制了TTT图,为国产T800级高韧性环氧树脂基预浸料的固化工艺优化提供理论支持。The curing kinetics and the time-temperature-transformation(TTT)diagram of prepreg system play an important role in designing and optimizing the curing cycle in order to obtain the ultimate properties of related products.In the present study,the curing kinetics of the domestic prepreg system with T800 carbon fiber and highly toughened epoxy resin were characterized by differential scanning calorimetry(DSC),and fitted using the autocatalytic model;in the aspect of phase transition behavior,the relationship between glass transition temperature and degree of cure was tested and fitted,and the relationship between gelation time and temperature was also obtained.Based on the obtained results,TTT diagram of the prepreg system was developed,providing the theoretical guidance for determining the curing cycle for composite parts.

关 键 词：复合材料 TTT图 固化动力学 玻璃化转变 环氧树脂 

分 类 号：TB332[一般工业技术—材料科学与工程]