Rheological behavior of polymer/layered silicate nanocomposites under uniaxial extensional flow

Jun Uk Park, Jeong Lim Kim, Do Hoon Kim, Kyung Hyun Ahn, Seung Jong Lee, Kwang Soo Cho
2006 Macromolecular Research  
We investigated the rheological behaviors and orientation of three different types of layered silicate composite systems under external flow: microcomposite, intercalated and exfoliated nanocomposites. Rheological measurements under shear and uniaxial extensional flows, two-dimensional, small-angle X-ray scattering and transmission electron microscopy were conducted to investigate the properties, as well as nano-and micro-structural changes, of polymer/layered silicate nanocomposites. The
more » ... red orientation of the silicate layers to the flow direction was observed under uniaxial extensional flow for both intercalated and exfoliated systems, while the strain hardening behavior was observed only in the exfoliated systems. The degree of compatibility between the polymer matrix and clay determined the microstructure of polymer/clay composites, strain hardening behavior and spatial orientation of the clays under extensional flow.
doi:10.1007/bf03219088 fatcat:yvb7pr4fxnfeleplwmrkdjfiji