| 橡胶微观结构因素对声障板吸声性能的影响 |
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| 引用本文： | 侯永振,王兵. 橡胶微观结构因素对声障板吸声性能的影响[J]. 材料开发与应用, 2017, 32(4) |
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| 作者姓名： | 侯永振 王兵 |
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| 作者单位： | 中国船舶重工集团公司第七二五研究所,河南洛阳471023;河南省减振降噪材料工程技术中心,河南洛阳471023 |
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| 摘 要： | 选择丁苯橡胶(SBR)和丙烯腈(CN)含量为36%~41%的丁腈橡胶(NBR),分别与氯化丁基橡胶(CIIR)共混,研究了SBR和NBR两种橡胶由于微观结构不同对声障板吸声性能的影响。由于微观结构的差异,SBR与NBR相比,其与丁基橡胶的共混(并用)胶料在0.5~3 MPa静水压力和3.5~7 k Hz频率范围条件下,吸声性能对静水压力的敏感性较低,且在试验的整个静水压力范围和频率范围尤其在1.5~3.5 k Hz频段具有更高的吸声性能。
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| 关 键 词： | 丁苯橡胶 丁腈橡胶 氯化丁基橡胶 吸声障板 声学性能 微观结构 链段运动 空间位阻 自由体积 |
Influence of Microstructure of Rubber on Acoustical Absorption Performances of Acoustical Baffle |
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| HOU Yongzhen,WANG Bing. Influence of Microstructure of Rubber on Acoustical Absorption Performances of Acoustical Baffle[J]. Development and Application of Materials, 2017, 32(4) |
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| Authors: | HOU Yongzhen WANG Bing |
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| Abstract: | In this paper was studied the influence of microstructures on the acoustical absorption properties of acoustical baffle,the blends of chlorined isobutyl-Isoprene rubber(CIIR) with the styrene butadiene rubber (SBR) or with nitrile rubber (NBR)with 36％ ～41％ of acrylonitrile(CN).The acoustical baffle made of blend of SBR and CIIR,compared with NBR/CIIR,showed lower sensitivity to the changes within the hydrostatic pressure range of 0.5 to 3 MPa and frequency range of 3.5 to 7kHz.And the acoustical absorption properties were better within the whole hydrostatic pressure and test frequency ranges,and the acoustical absorption property was the best within the lower frequency range of 1.5 ～ 3.5 kHz. |
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| Keywords: | styrene butadiene rubber nitrile rubber chlorined isobutyl-isoprene rubber acoustical baffle acoustical absorption properties microstructure segmental motion steric hindrance free volume |
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