Nanocomposites rheological properties

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

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

The rheological properties of insitu polymerized nanocomposites with end-tethered polymer chains were first described by Krisnamoorti and Giannelis [33]. The flow behavior of PCL- and Nylon 6-based nanocomposites differed extremely from that of the corresponding neat matrices, whereas the thermorheological properties of the nanocomposites were entirely determined by the behavior of the matrices [33]. The slope of G (co) and G"(co) versus flxco is much smaller than 2 and 1, respectively. Values of 2 and 1 are expected for linear mono-dispersed polymer melts, and the large deviation, especially in the presence of a very small amount of layered silicate loading, may be due to the formation of a network structure in the molten... 

Krishnamoorti R, Silva AS (2000) Rheological properties of polymer layered-silicate nanocomposites. In Pinnavaia TJ, Beall G (eds) Polymer nanocomposites. Wiley, New York Ren J, Silva AS, Krishnamoorti R (2000) Macromolecules 33 3739... 

Lepoittevin, B., Devalckenaere, M., Pantoustier, N., Alexandre, M., Kubies, D., Calberg, C., Jerome, R., and Dubois P. Poly (l-caprolactone)/clay nanocomposites prepared by melt intercalation Mechanical, thermal and rheological properties, Polymer (2002), 43,4017-4023. 

Figure 4.17. Linear melt-state rheological properties as a function of oscillatory frequency (a) storage modulus, G and (b) loss modulus, G" (c) Dependence of complex viscosity on temperature for ABS nanocomposites. Reprinted with permission from ref (68).

In Reference 107, the effect of grafting of a polar group (MAH) onto LDPE chains and the chemical modification of clay particles with 2,6-diaminocaproic acid (L-lysine monohydrochloride) to produce nanocomposites with a matrix composed of a ternary blend of PEs (LDPE, LLDPE, and HDPE) was studied in detail. X-ray diffraction was used to determine the exfoliation degree of the clay. Morphological features were revealed by scanning electron microscopy and thermal analysis disclosed the thermal stability of the samples. Comparative analyses of the mechanical (under tension) and rheological properties of the nanocomposites were carried out as well. 

Samakande A, Sanderson RD, Hartmann PC (2009) Rheological properties of RAFT-mediated poly(styrene-co-butyl acrylate)-clay nanocomposites [P(S-co-BA)-PCNs] emphasis on the effect of structural parameters on thermo-mechanical and melt flow behaviors. 

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. 

Berta, M., Saiani, A., Lindsay, C., and Gunaratne, R., Effect of clay dispersion on the rheological properties and flammability of polyurethane-clay nanocomposite elastomers, J. Appl. Polym. ScL, 112, 2847-2853 (2009). 

Mishra, J. K., Hwang, K.-J., and Ha, C.-S., Preparation, mechanical and rheological properties of a thermoplastic polyolefin (TPO)/organoclay nanocomposite with reference to the effect of maleic anhydride modified polypropylene as a compatibifizer. Polymer, 46, 1995-2002 (2005). 

Di, Y., lannace, S., Maio, E.D., Nicolais, L. Poly(lactic acid)/organoclay nanocomposites Thermal, rheological properties and foam processing. J. Polym. Sci., Part B Polym. Phys. 43, 689-698 (2005)... 

Another example of how the functionalization of CNTs represents an open issue for the preparation and manipulation of CNT-based nanocomposites with multifunctional properties was reported by Terenzi et It was shown that CNT dispersion affected the rheological properties of... 

Sarvestani, A. S. Jabbari, E., Modeling and experimental investigation of rheological properties of injectable poly(lactide ethylene oxide fiimaratej/hydroxyapatite nanocomposites. Biomacromolecules 2006, 7, (5), 1573-1580. 

Hyde, J. Licence, P. Carter, D. Poliakoff, M. (2001) Continuous Catalytic Reactions in Supercritical Fluids. Appl. Catal., A. Vol.222, No.1-2, pp.119-131 Jin, S. Kang, C Yoon, K Bang, D. Park, Y. (2009) Elect of compatibilizer on morphology, thermal, and rheological properties of polypropylene/functionalized multi-walled carbon nanotubes composite. /. Ayyl. Polym. Set. Vol.lll, No.2, pp.1028-1033 Joen, H Jung, H Lee, S. Hudson, S. (1998) Morphology of polymer/Silicate Nanocomposites Hieh Density Polyethylene and a Nitrile Copolymer. Polym. Bull. Vol.41, No.l, pp.107-111... 

The electrical conductivity of the polymer is dramatically enhanced even at a low loading level of the nanotubes. The rheological properties of the PPS nanocomposites show a sudden change dependent on the CNT fraction. The thermal and mechanical properties of the nanocomposites show a significant increase with the CNT fraction [82]. 

Koo, C. M., Kim, M. J., Choi, M. N., Kim, S. O., and Chung, I. J. 2003. Mechanical and rheological properties of the maleated p>olypropylene-layered silicate nanocomposites with different morphology. Journal cf Applied Polymer Science 88 1526-1535. 

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