Filled polymeric systems

Abstract Porous copolymers have been prepared by suspension-emulsion polymerization of divinylbenzene with styrene or some methacrylic monomers di(methacryloyloxymethyl)naphthalene, methacrylic ester of p,p -dihydroxy-diphenylpropane diglycidyl ether, and dimethacrylglycolethylene in the presence and absence of chemically modified fillers (fumed silicas with grafted methyl and silicon hydride groups). The results of investigations of the unfilled and filled polymeric systems by IR and 13C NMR spectroscopies combined with AFM are presented. 

Poslinski, A. J., Ryan, M. E., Gupta, R. K., Seshadri, S. G., and Frechette, F. J. 1988. Rheological behavior of filled polymeric systems I. Yield stress and shear-thinning effects, y. Rheol. 32 703-735. 

We will now consider gas-filled polymeric systems as bodies composed of a very large number of individual particles containing spaces. In general these spaces may be either void or filled with gas or liquid. For simplicity, the particles themselves will be assumed to be non-porous. 

Saini, D.R. Shenoy, A.V. Nadkarni, V.M. (1985). Effect of Surface Treatments on Rheological, Mechanical and Magnetic Properties of Ferrite-Filled Polymeric Systems. Polymer Engineering and Science, Vol.25, No.l3, pp. 807-811 ISSN 0032-3888... 

The second chapter deals with the fundamentals of rheology and provides definitions of all the basic rheological parameters. It dwells on the non-Newtonian character of filled polymeric systems and explains the various anomalies that are encountered during the flow of viscoelastic materials. Various viscoelastic phenomena are depicted and these give an idea about the complexities involved in the flow of polymeric materials, which gets further complicated in the presence of fillers. 

Saini, D.R. and Shenoy, A.V. (1986) Viscoelastic properties of highly loaded ferrite-filled polymeric systems, Polym. Engg Sci., 26,441-5. 

Carreau, P.J. (1992) Rheology of filled polymeric systems, in Transport Processes in Bubbles, Drops and Particles (eds R.P. Chhabra and D. Dekee), Hemisphere Publishing, New York, 165-90. 

For highly filled polymeric systems, higher loads must be employed and the capillary diameter modified if necessary, depending on the size and shape of the fillers. 

Saini, D. R., Shenoy, A. V., and Nadkarai, V. M., Effect of surface treatment on the rheological and mechanical properties of ferrite filled polymeric systems, Polym. Eng. Scl, 25, 807-811 (1985). 

The research of viscoelastic properties of filled polymeric systems is very important for the estimation of the behavior of articles made from them under operating conditions and under impact of considerable loads. 

A.J. Poslinki, M.E. Ryan, R.K. Gupta, S.G. Seshadri, F.J. Frechette. Rheological behavior of filled polymeric systems. II. The effect of a bimodal size distribution of particulates. /. Rheol, 32, 751-771,1988. 

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