摘要
研究了水溶性高分子涂料在其溶解过程中的吸声机理。合成了水溶性高分子涂料,并在声管中测试其溶解过程中声衰减性能。实验结果表明水溶性高分子涂料溶解过程中形成的高分子梯度溶液的声衰减效果明显优于(即大于)相应的均匀溶液。根据连续分层介质中声波传播理论建立了计算水溶性高分子溶解过程中声衰减的数学模型。计算结果与实验结果一致。由实验和理论分析结果得出了水溶性高分子涂料在其溶解过程中的梯度吸声机理,即多次反射、多次吸收,最终将声能转化为热能。
Attenuation was paid to the study on the sound absorption mechanism of water-soluble polymer during dissolving. A specially designed water-soluble polymer coating was synthesized in our lab. The sound attenuation property was measured in sound tube. Result showed that the sound attenuation of the gradient polymer solution was larger than that of the uniform. Depending on the experimental result and the theory of sound wave propagation in layered medium, a mechanism of gradient water-soluble polymer solution was developed. This mechanism can be described as follows： a water-soluble polymer coating formed a concentration gradient layer when it was dissolved in water. This gradient layer ted to multiple reflection and absorption of sound. Finally the sound energy was transferred into heat.
出处
《声学学报》
EI
CSCD
北大核心
2006年第1期14-18,共5页
Acta Acustica
关键词
水溶性高分子
吸声机理
溶液
梯度
高分子涂料
溶解过程
计算结果
数学模型
理论建立
声波传播
Acoustic wave absorption
Acoustic wave propagation
Acoustic wave reflection
Attenuation
Coatings
Concentration (process)
Solutions
Tubes (components)
Water
