定型剂对经编织物液态成型复合材料工艺性及其力学性能的影响  

Effects of tackifier on liquid composite molding processes and mechanical properties of non-crimp fabric composite

作　　者：龚明[1] 杨晋[1] 李龙[1] 赵潇然 李伟东 刘刚 肇研[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100191 [2]中航复合材料有限责任公司中航工业复合材料技术中心,北京100095

出　　处：《复合材料学报》2017年第4期737-743,共7页Acta Materiae Compositae Sinica

摘　　要：研究了双马来酰亚胺树脂定型剂含量对0°/90°双轴向经编织物(Non-crimp fabric,NCF)定型效果、液态成型工艺性、复合材料力学性能的影响。采用厚度回弹、C型回弹的方法表征定型效果;采用厚度压缩与偏轴拉伸实验表征带定型剂织物成型工艺性;并采用弯曲实验与层间剪切实验表征复合材料力学性能。实验结果表明定型剂的添加显著提高了NCF织物的预定型效果;经定型剂处理后NCF织物的面内剪切模量有了较大提高,抗剪切变形能力增强;添加定型剂对0°/90°双轴向NCF织物复合材料的力学性能影响不大,但在改善其工艺性的同时并不会降低其复合材料的力学性能。The effects of bismaleimide tackifier with different contents on the styling effects,liquid composite molding processes and mechanical performances of the 0°/90°biaxial non-crimp fabric（NCF）were mianly studied.The thickness springback and C type springback researches were used to characterize the styling effects.The thickness compress and the bias extension test methods were used to characterize molding processes of NCF.And three-point bending experiment and interlaminar shear test were conducted on the mechanical properties of NCF.The experimental results show that bismaleimide tackifier plays significant styling effects on preform.The in-plane shear properties and the resistance of shear deformation of NCF with tackifier are obviously improved.The addition of tackifier has little effects on mechanical properties of the 0°/90°biaxial NCF.Tackifier can improve the performances of liquid composite molding processes of NCF,and preserve mechanical properties of the composites at the same time.

关 键 词：定型剂 预成型体 经编织物 液态成型 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]