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描述了聚合物共混物及纤维增强聚合物基复合体系的内耗研究现状，并着重分析了内耗行为与微观结构的相关性。指出内耗特征可在分子水平上反映共混物组份间和复合材料界面间的相互作用，并因此而成为研究共混物超分子结构和复合材料亚微界面结构的敏感而有效的表征手段。目前迫切需要解决的问题包括对内耗微观机制的研究，建立起适当的模型，并赋予特征参数以明确的物理意义。
The current research status of internal friction of polymer blends and fiber reinforced polymer matrix composites was described. The correlation between internal friction behavior and microstructure was also analyzed. It is pointed out that the internal friction characteristic can reflect the interaction between the blend components and the interface of the composites at the molecular level and thus become a sensitive and effective means of characterization of the supramolecular structure of the blend and the submicron interface structure of the composite. At present, the urgent problems to be solved include the research on the micro-mechanism of internal friction, establishing the appropriate model and giving the explicit definition of the characteristic parameters.