Nanocomposite rheology

The results observed in this ehapter emphasize that the microcomposites rheology description models do not give adequate treatment of melt viscosity for particulate-filled nanocomposites. The correct description of the nanocomposites rheological properties can be obtained within the frameworks of viscous liquid flow fractal models. It is significant, that such an approach differs principally from the used ones to describe microcomposites. So, nanofiller particles aggregation reduces both melt viscosity and elastic modulus of nanocomposites in the solid-phase state. For microcomposites, melt viscosity enhancement is accompanied by elastic modulus increase. 

Kairn, T., Daivis, P. J., Ivanov, I., and Bhattacharya, S. N., Molecular-dynamics simulation of model polymer nanocomposite rheology and comparison with experiment, J. Chem. Phys., 123, 194905-1 (2005). 

Barzic Razvan Florin, Barzic Andreea Irina, and Dumitrascu Gheorghe. Percolation network formation in poly(4-vinylpyridine)/aluminum nitride nanocomposites Rheological, dielectric, and thermal investigations. Polym. Compos. 35 no. 8 (2014) 1543-1552. 

Du F, Scogna RC, Zhou W, Brand S, Fischer JE, Winey KI (2004) Nanotube networks in polymer nanocomposites rheology and electrical conductivity. Macromolecules 37 9048 Ebhesen TW, Lezec FU, Hiura H, Bennett JW, Ghaemi HF, Thio T (1996) Electrical conductivity of individual carbon nanotubes. Nature 382 54... 

S. K. Swain and A. I. Isayev. Effect of ultrasound on HDPE/clay nanocomposites rheology, structure and properties. Polymer, 48 (2007), 281-289. 

XRD, SEM, and TEM are widely used for morphological characterization of nanocomposites. Rheology has also been used extensively in complement to these techniques in several studies as it is very sensitive to the morphology of nanocomposites [23,75-80]. The summary of the most significant results from these studies is the transition from liquid-like to solid-like viscoelastic behavior for nanocomposites, even at low-volume fractions of silicate layers, as well as a strong shear-thinning behavior. The solid-like behavior has been attributed to the formation of a percolated network of clay particles that occurs at relatively low clay loading, due to the anisotropy of the particles, which prevents their free rotation and the dissipation of stress. 

Knauert ST, Douglas JF, Starr FW. The effect of nanoparticle shape on polymer-nanocomposite rheology and tensile strength. J Polym Sci Part B Polym Phys 2007 45 1882-97. 

Wang Z, Ciselli P, Peijs T (2007) The extraordinary reinforcing efficiency of single-walled carbon nanotubes in oriented poly (vinyl alcohol) tapes. Nanotechnology 18 455709 Abbasi S, Carreau PJ, Derdouri A (2010) Flow induced orientation of multiwalled carbon nanotubes in polycarbonate nanocomposites rheology, conductivity and mechanical properties. Polymer 51 922... 

Carbon nanotube, thermotropic liquid crystalline polymer, polymer nanocomposites, rheology... 

This mbber is very tacky in nature and contains acrylic group, which makes it polar in nature. Nanocomposites have been prepared based on this elastomer with a wide range of nanohllers. Layered silicates [53-55] have been used for this preparation. Sol-gel method [56,57], in situ polymerization [58], and nanocomposites based on different clays like bentonite [59] and mica [60] have been described. The mechanical, rheological, and morphological behaviors have been investigated thoroughly. 

PP is probably the most thoroughly investigated system in the nanocomposite field next to nylon [127-132]. In most of the cases isotactic/syndiotactic-PP-based nanocomposites have been prepared with various clays using maleic anhydride as the compatibilizer. Sometimes maleic anhydride-grafted PP has also been used [127]. Nanocomposites have shown dramatic improvement over the pristine polymer in mechanical, rheological, thermal, and barrier properties [132-138]. Crystallization [139,140], thermodynamic behavior, and kinetic study [141] have also been done. 

Understanding the melt rheology of rubber nanocomposites is crucial from the processing perspective. Bandyopadhyay et al. [37] have studied the melt flow behavior of rubber-silica hybrid nanocomposites in a capillary rheometer. 

Effects of Fillers on Rheological Properties of Rubber and Rubber Nanocomposites.785... 

EFFECTS OF FILLERS ON RHEOLOGICAL PROPERTIES OF RUBBER AND RUBBER NANOCOMPOSITES... 

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