国产T800级碳纤维环氧预浸料室温储存性能  

Storage performance of domestic T800 carbon fiber epoxy prepreg at room temperature

作　　者：祝林 王浩军 郑超 赵虎 李尧 ZHU Lin;WANG Haojun;ZHENG Chao;ZHAO Hu;LI Yao(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,西安710089

出　　处：《工程塑料应用》2024年第4期128-134,共7页Engineering Plastics Application

基　　金：国家重点研发计划项目(2021YFB3401700)。

摘　　要：预浸料在室温下的老化会导致预浸料理化性能与工艺性能的变化,甚至对复合材料构件的质量产生不利影响。为研究新一代国产T800级高韧性AC531环氧预浸料的室温储存性能,考察了室温储存时间对单向带与织物预浸料的树脂流动度、挥发份含量、固化反应程度以及黏性的影响,并且使用不同储存时间的预浸料制备了大厚度、大曲率L型复合材料构件,对复合材料构件的内部质量、单层固化厚度以及力学性能进行了测试。结果表明,室温储存30 d后,预浸料的树脂流动度略有降低,挥发份含量略有升高,固化度上升,单向带预浸料黏性等级变为4级,织物预浸料黏性等级变为3级,预浸料的工艺性降低,织物预浸料的黏性保持期优于单向带预浸料。储存30 d后的预浸料制备的大厚度大曲率L型复合材料构件,仍具有较高的内部质量,单层固化厚度满足要求,复合材料的弯曲强度与层间剪切强度几乎保持不变。The aging of prepreg at room temperature caused changes of the physicochemical and processing properties of prepreg,and even affected the quality of composite components.To investigate the storage performance at room temperature of new generation domestic T800 grade toughened AC531 epoxy prepreg,the effect of storage time at room temperature on the resin flow,volatile content,cure degree,and tack of unidirectional tape and fabric prepreg were examined.In addition,large-thickness and highcurvature L-shaped composite components were prepared using the prepreg with different storage times,and the internal quality,monolayer curing thickness and mechanical properties of the composite components were tested.The results show that after 30 d of storage at room temperature,the resin flow of the prepreg slightly decreases,and the volatile content slightly increases,the tack level of the unidirectional tape prepreg changes to level 4,while the tack level of the fabric prepreg changes to level 3,the processability of the prepreg decreases,and the tack retention time of the fabric prepreg is better than that of the unidirectional tape prepreg.The large-thickness and high-curvature L-shaped composite components prepared from the prepreg after 30 d of storage still exhibit high internal quality,and the cured ply thickness meets the requirements,the flexural strength and interlaminar shear strength remain almost unchanged.

关 键 词：预浸料 储存性能 树脂流动度 固化度 黏性 力学性能 内部质量 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]