无纺布插层共固化双马树脂基复合材料的力学和阻尼性能  

Mechanical and Damping Properties of Bismaleimide Resin Co-cured Composite with Nonwoven Fabrics

作　　者：倪楠楠[1] 温月芳[1] 贺德龙[2] 益小苏[2] 许亚洪[3] 

机构地区：[1]浙江大学化学工程与生物工程学院,浙江杭州310013 [2]北京航空材料研究院,北京100095 [3]航天特种材料与工艺研究所,北京100074

出　　处：《高分子材料科学与工程》2016年第5期75-80,86,共7页Polymer Materials Science & Engineering

基　　金：国家"863"重点研究项目(2015AA03A201)

摘　　要：利用尼龙无纺布(PNF)和芳纶无纺布(ANF)为插层材料,采用共固化工艺制备了结构阻尼复合材料。利用动态力学分析仪测试并分析了复合材料的损耗因子和储能模量等动态力学指标;通过弯曲实验和短梁剪切实验评价其静态力学性能。此外,通过单悬臂梁强迫共振实验和自由振动衰减实验研究了复合材料层合板的共振频率和损耗因子。结果表明,添加2种无纺布能够与基体树脂在层间形成非反应双连续的相结构,插入ANF的[0°]16铺层复合材料归一化的弯曲强度和模量比空白样品提高了约10%,[±45°]4s铺层复合材料的弯曲强度提高约50%,且均高于插入PNF的复合材料。此外,由于层间富树脂区的形成和界面数目的增加提高了共固化复合材料的阻尼性能,插入15层PNF的[0°]16铺层复合材料的损耗因子达到0.0026,比空白样品提高了约116.7%,[±45°]4s铺层复合材料的损耗因子达到0.0064,比空白样品提高了约14.3%。A structural damping composite was prepared by co-curing method with aramid nonwoven fabrics（ANF）and polyamide nonwoven fabrics（PNF）as interleaves.Dynamic mechanical indicators such as storage modulus and loss factors were measured and analyzed by DMA.Furthermore,static mechanical properties were estimated through measuring the flexural properties and interlaminar shear strength of the co-cured composites.In addition,single cantilever beam forced resonance experiment and free vibration decaying experiment were carried out.It is observed that nonwoven fabrics could form the non-reactive bicontinuous phase structure with the matrix in the interlaminar.The flexural strength and modulus of[0°]16composite with ANF are nearly10% higher than those of the control sample.Moreover,the flexural strength of[±45°]4scomposite with ANF is higher than that of the control sample as much as 50%,which is also higher than that of the composite with PNF.Additionally,the damping properties of the co-cured composites are also improved as a result of the formation of the resin-rich zones and the increase of the interfaces.Among them,the loss factor of[0°]16and[±45°]4scomposite with PNF is 0.0026 and 0.0064,respectively,which is more than those of the control one as much as 116.7% and 14.3%.

关 键 词：无纺布 结构阻尼复合材料 共振频率 共固化 损耗因子 

分 类 号：TB332[一般工业技术—材料科学与工程]