It is a promising method to obtain desirable damping materials by introducing dangling chains used as additional relaxation components. Regrettably, the strict condition of introducing dangling chains limits its application to saturated polymer or low unsaturated degree polymer, for example butyl rubber (IIR). Hence, we propose a simple yet effective method to obtain desirable IIR based damping composites by blending with miscible polyisobutylene (PIB) oligomers as additional relaxation components in this study. As expected, the damping property of IIR is easily controlled by tuning the chain length of PIB oligomers. The effects of PIB oligomers with different chain length on the molecular motions and damping mechanism of IIR were characterized by dynamical mechanical analysis and 2D correlation dynamic mechanical spectroscopy (2DC-DMS). The damping improvement of IIR was ascribed to the additional relaxation generated by introducing PIB oligomers and the movement of sub-Rouse modes and Rouse modes. It seems a universal method to enhance damping property by using miscible polymer oligomers as additional relaxation component. Furthermore, this method may give some inspirations for preparing polymer matrix specially used for damping composites.

通过引入悬空链用作附加的松弛成分来获得所需的阻尼材料是一种很有前途的方法。遗憾的是，引入悬挂链的严格条件限制了其在饱和聚合物或低不饱和度聚合物（例如丁基橡胶（IIR））中的应用。因此，在本研究中，我们提出了一种简单有效的方法，通过与可混溶的聚异丁烯（PIB）低聚物作为额外的弛豫组分共混来获得理想的基于IIR的阻尼复合材料。如预期的那样，通过调节PIB低聚物的链长很容易控制IIR的阻尼特性。通过动态力学分析和二维相关动态力学谱（2DC-DMS），表征了不同链长的PIB低聚物对IIR分子运动和阻尼机理的影响。IIR的阻尼改善归因于通过引入PIB低聚物以及子Rouse模式和Rouse模式的移动而产生的额外松弛。通过使用可混溶的聚合物低聚物作为附加的弛豫组分，似乎是一种通用的增强阻尼性能的方法。此外，该方法可能为制备专门用于阻尼复合材料的聚合物基体提供一些启示。