聚合物—层状硅酸盐纳米复合材料的流变特性研究

Advances in Rheological Study of Polymer-layered Silicate Nanocomposites

聚合物一层状硅酸盐纳米复合材料与常规颗粒填充体系具有相似的流变特性,通常表现出模量升高、频率依赖性的改变等与纯聚合物明显不同的流变行为,且储能模量在低频区会表现出似固体的平台发展,而频率依赖性会表现出非末端行为。对流变行为和粘弹特性的测定是研究该纳米复合材料体系介观结构以及聚合物基体与纳米颗粒间的相互作用强度的有力工具。综述了聚合物一层状硅酸盐纳米复合材料的流变特性、粘弹机理以及硅酸盐片层的流动取向方面的研究进展。

Polymer-layered silicate nanocomposites display similar rheological properties to those of particle-filled polymers. They usually exhibit the rheology such as increased moduli and variation of frequency dependence, which is distinctly different from pure polymers. Meanwhile, they also show solidlike plateau at lower frequencies and their frequency-dependence exhibits nonterminal behavior. Rheological and viscoelastic measurements provide a sensitive tool to probe the mesoscale structure and the strength of polymer-nanoparticle interactions. In this paper, the rheological and viscoelastic properties and flow orientation of polymer-layered silicate nanocomposites are reviewed.