基于塑化聚甲基丙烯酸丁酯、聚甲基丙烯酸甲酯和聚醋酸乙烯酯的阻尼材料

A. Syatkovskiy, I. D. Simonov-Emelyanov
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引用次数: 0

摘要

本研究的目的是通过 DMA 方法研究基于聚醋酸乙烯酯 (PVA)、聚甲基丙烯酸丁酯 (PBMA) 和聚甲基丙烯酸甲酯 (PMMA) 的填充和未填充增塑组合物的成分对其阻尼特性的影响。研究发现,在聚合物中加入增塑剂后,机械损耗系数的值会先增大,达到最大值,然后随着增塑剂含量的进一步增加而开始减小。增塑剂/聚合物体积比为 0.2-0.4 时,效果最大。另外两个耗散特性,即有效阻尼的温度区间和机械损失的积分系数,也发生了类似的变化。研究表明,在基于 PVA 和 PBMA 的组合物中添加氯化石蜡可显著改善其吸振特性。在基于 PVA 和 PBMA 的增塑组合物中加入云母填料不会导致出现额外的松弛机制。随着云母含量的增加,组合物的弹性模量在整个温度范围内都会增加(尤其是增塑剂含量高的组合物),机械损失系数略有下降,而观察到最大阻尼的温度几乎没有变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Damping materials based on plasticized polybutyl methacrylate, polymethyl methacrylate and polyvinyl acetate
The purpose of the presented work is to investigate by DMA method the influence of the composition of filled and unfilled plasticized compositions based on polyvinyl acetate (PVA), polybutyl methacrylate (PBMA) and polymethyl methacrylate (PMMA) on their damping characteristics. It was found that when plasticizer is introduced into the polymer, the value of the mechanical loss coefficient first increases, reaches its maximum, and begins to decrease with further increase in the plasticizer content. The maximum effect is observed at a plasticizer/polymer volume ratio of 0.2-0.4. Two other dissipative characteristics, the temperature interval of effective damping and the integral coefficient of mechanical losses, are changing similarly. It is established that the additives of chlorinated paraffins in compositions based on PVA and PBMA can significantly improve their vibration absorbing characteristics. Introduction of mica filler into the composition of plasticized compositions based on PVA and PBMA does not lead to the appearаnсe of additional relaxation mechanisms. With increasing of the content of mica, the elastic modulus of compositions increases in the entire temperature range (especially significantly for compositions with a high content of plasticizer), the coefficient of mechanical losses slightly decreases, and the temperature practically does not change at which the maximum damping is observed.
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