长纤维增强PA66复合材料熔融预浸过程的纤维断裂研究  

A study of fiber fracture in the preimpregnation process for long fiber reinforced polyamide 66 composites

作　　者：金泽宇[1] 信春玲[1] 李莹[1] 闫宝瑞[1] 任峰[1] 何亚东[1,2] 

机构地区：[1]北京化工大学机电工程学院,北京100029 [2]北京化工大学教育部高分子材料加工装备工程研究中心,北京100029

出　　处：《北京化工大学学报（自然科学版）》2016年第6期56-62,共7页Journal of Beijing University of Chemical Technology(Natural Science Edition)

摘　　要：采用熔融浸渍工艺和自行设计的弯曲流道浸渍模具,对长纤维增强PA66复合材料熔融浸渍过程中的纤维断裂进行研究,建立了纤维断裂数学模型,并实验验证了模型的可靠性。通过Design-Expert软件设计实验,采用模型模拟了模具结构对纤维断裂的影响。结果表明:接触区高度差和接触区数目对纤维断裂影响显著,其次为模具的圆角半径和弯曲角度;通过减少接触区高度差以及接触区数目可有效降低纤维断裂率,提高加工过程的稳定性。The fiber fracture mechanism in the process of long fiber reinforced polyamide 66 composite preimpreg- nation has been studied by monitoring the melt impregnation process in a homemade impregnation mold with a curved runner. A fiber fracture mathematical model was developed and verified experimentally. The effects of the mold structure on fiber fracture were simulated by the model using experiments which designed by means of the De- sign-Expert software. The results suggest that the height difference between two adjacent fiber-mold contact areas and number of fiber-mold contact areas have more significant effects on the degree of fiber fracture than either the corner radius or the bending angle of the mold. Reducing the height difference between two adjacent fiber-mold contact areas and the number of fiber-mold contact areas are beneficial in terms of decreasing the degree of fiber fracture, as well improving processing stability.

关 键 词：纤维断裂 熔融浸渍 模具结构 长纤维增强热塑性复合材料 

分 类 号：TQ327.11[化学工程—合成树脂塑料工业]