PVC/PNBR橡塑合金对中低频噪音吸音性能的影响  

Sound-Absorbing Performanceof PVC/PNBR Rubber & Plastic Alloy at Low and Middle Frequency Noise

作　　者：石琢[1] 杨天兵[1] 傅雅琴[1] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2010年第1期22-25,78,共5页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金项目(50173033);长江学者和创新团队发展计划资助(IRT0654)

摘　　要：为了制备对中低频噪音具有良好吸音性能的材料,以聚氯乙烯(PVC),粉末丁腈橡胶(PNBR)和邻苯二甲酸二正辛酯(DOP)为主要原材料,利用常压浇注法制备了不同质量比的PVC/PNBR橡塑合金。利用DMA测试材料的动态力学阻尼性能,并对材料可能具备的分子结构进行了预测分析;分析了材料的力学性能和对中低频噪音的吸音系数。结果表明:当PVC、PNBR与DOP质量比为70∶30∶130时,材料具有较大的阻尼性和较好的力学性能的同时,在250、1000、2000Hz下有较好的吸声性能;PVC/PNBR橡塑合金的阻尼性能与吸声性能之间存在着较强的依存关系,改善材料的阻尼性能是提高材料对中低频噪音吸音性能的途径之一。In order to prepare material with better sound absorption at tow and middle frequency noise, polyvinyl chloride （PVC）, nitrile rubber powder （PNBR） and dioctyl phthalate （DOP） were taken as main raw materials, PVC/PNBR rubber ＆plastic alloys with different mass ratio were prepared by the method of normal pressure casting. Dynamic mechanical damping properties of the material was tested by DMA, and the analysis on molecular structure could be carried out; mechanical properties and sound absorbing coeffi- cient at low and middle frequency noise of materials were analyzed by universal testing machine and acoustic standing wave tube two channel analyzer separately. The results showed that. When the mass ratio of PVC, PNBR and DOP was 70： 30： 130, samples have better damping properties and mechanical properties at the same time, and better noise performance at the 250 Hz, 1000Hz, 2000Hz;Damping performance and acoustic performance own interdependent relationship in the PVC / PNBR rubber＆plastic alloy, so improving damping performance of materials is one way of improving sound absorption property at low and middle frequency noise.

关 键 词：橡塑合金 动态力学性能 拉伸性能 吸音性能 

分 类 号：TB332[一般工业技术—材料科学与工程]