From Thermoset Nanocomposites for Engineering Applications

2.3 Rheological Methods for Nanocomposite Characterisation

The main distinction between the rheology of matrix polymer (single-phase system) and of nanocomposites (multiphase systems) is the effect of the flow field on the rheological response. Flow field affects the structure of the whole deformed volume of the sample, as well as the structure of the dispersed nanoparticles (e.g., dispersion, orientation of platelets, flocculation/deflocculation, and so on). The structure of the liquid samples tested is modified in a different way in flow at high and low strains. Because of sensitivity of the structure to the flow conditions, the selected test method should reflect the final use of the data. For example, low-strain testing should be used for material characterisation, but high-strain flow data are useful for simulation and modelling of the flow [18].

Most rheological studies are carried out with polymer/clay nanocomposites in shear and elongation. These investigations have shown that, even at low clay content, the flow is very complex. The rheological responses vary in a wide range of performance that starts with the traditional behaviour of composites or colloidal systems and ends with end-tethered nanocomposites showing quite distinct and unique flow characteristics [2].

2.3.1 Rheology as a Tool for Control of Nanocomposites

Rheology was recently used for characterisation of nanocomposites, but general concepts for the practical application of rheology as a tool for the control of nanocomposites at the stage of their preparation have still not been reported. Researchers agree that rheological measurements provide potentially the most sensitive methods for nanocomposite...

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Topics of Interest

2.4 Advantages of Rheological Methods for Thermoset Nanocomposite Technology 2.4.1 Preparation and Characterisation of Nanofiller/Resin Hybrids The rheological approach discussed previously is...

R. Kotsilkova 2.1 Rheology of Polymer Nanocomposites An Overview The rheological characterisations of polymer nanocomposites are mostly orientated to better understanding the dynamics of...

2.5 Rheological Approach to Prognostic Design of Nanocomposites 2.5.1 Structure-Property Relationships In the last few years, the emphasis of nanocomposite research has been on the understanding of...

Chapter List Chapter 1: Polyamide/clay Nanocomposites Chapter 2: Epoxy Nanocomposites Based on Layered Silicates and Other Nanostructured Fillers Chapter 3: Biodegradable Polymer/Layered Silicate...

T TANG, X TONG, Z FENG and B HUANG, Chinese Academy of Sciences, People's Republic of China 6.1 Introduction Polymer nanocomposite is a class of hybrid materials composed of an organic polymer matrix...