基于聚合物流体的松弛行为制备高性能阻尼材料

高分子材料具有独特的粘弹性，即在外力作用下同时会表现出黏性液体和弹性固体的特征，黏性部分可以有效地将机械能耗散，最适合作为阻尼材料。然而，此类材料存在诸多缺陷，聚合物玻璃转变区的温度或频率的跨度分别仅为20℃和102Hz，无法满足外界复杂环境的需求，而且有效阻尼区域的宽度及大小难以精确可调，阻尼区域的拓宽往往伴随有损耗峰值的减小。所以，亟需克服目前存在的局限性，发展高性能、宽温域、宽频域、力学性能精确可调的阻尼材料。28.40MB

Polymer materials possess unique viscoelasticity, namely they exhibit the characteristics of both viscous liquids and elastic solids under external forces. The viscous component can effectively dissipate mechanical energy, making them the most suitable candidates for damping materials. However, such materials have numerous defects: the temperature span and frequency span of the polymer glass transition region are only 20℃ and 102 Hz respectively, which fails to meet the requirements of complex external environments. Moreover, the width and size of the effective damping region are difficult to be precisely adjusted, and widening the damping region is often accompanied by a decrease in the loss peak. Therefore, there is an urgent need to overcome the existing limitations and develop damping materials with high performance, wide temperature range, wide frequency range and precisely adjustable mechanical properties. 28.40MB