基于DMA法的新型黏弹性材料阻尼特性研究  

Dynamic damping performance of viscoelastic materials based on dynamic mechanical analysis(DMA)means

作　　者：许俊红[1] 李爱群[1] 苏毅[2] 庄继忠 黄国元 骆春燕 

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]南京林业大学土木工程学院,江苏南京210037 [3]常州兰锦橡塑有限公司,江苏常州213013

出　　处：《振动工程学报》2015年第2期203-210,共8页Journal of Vibration Engineering

基　　金：国家科技支撑计划课题(2006BAJ03A04);国家自然科学基金资助项目(51278104)

摘　　要：鉴于黏弹性阻尼材料在建筑结构抗震减震及抗风方面的重要性,以丁腈橡胶为基体、基于DMA法,首先考察了氯化聚丙烯(CPP)、短碳纤维(CARB)、200目石墨粉(GRAP)、鳞片石墨(FLAKE)、云母粉(MICA)等与基体材料共混物的基本力学性能,其次研究了掺合剂对基体材料的影响,并给出了组分比对基体胶阻尼性能的影响效果对比分析。研究结果满足了两个设计要求:1.改进了材料的阻尼性能,使损耗因子提高至1.26;2.使原材料的温位Tg从28.2℃调整至15℃左右,并大大拓展了tanδ>0.5的温域。并且研究发现,单纯添加200目石墨粉的效果最佳,粒径大的炭黑类材料如高耐磨炭黑(FEF)和软质快压出炭黑(HAF)对NBR材料的改进效果不大。In view of the effectiveness and importance of viscoelastic material to seismic resistance and wind-resistant of building structure,with nitrile rubber as substrate,based on DMA means,the effect of mixture such as CPP,short carbon fiber,200 graphite powder,flake graphite,mica powder and et al to the damping performance of NBR is discussed,and the influence of component ratio to the substrate is given.Research results meet two design requirements,firstly,the damping properties of materials was improved,and the loss factor was increased to 1.26,the second,T g is adjusted from 28.2℃ to 1 5℃,and the temperature range which tanδ value is higher than 0.5.The research shows that,just added 200 graphite powder,it achieves the best effect.Improvement of particle size large of carbon black material such as FEF and HAF has little effect.

关 键 词：抗震减震 丁腈橡胶 掺合料 DMA 损耗因子 

分 类 号：TU951[建筑科学] TB324[一般工业技术—材料科学与工程]