Rheological Behavior of Filled Polymeric Systems II. The Effect of a Bimodal Size Distribution of Particulates

Autor:	M. E. Ryan, A. J. Poslinski, F. J. Frechette, Srinivasan Seshadri, Rakesh K. Gupta
Rok vydání:	1988
Předmět:	Materials science Mechanical Engineering Composite number Dynamic mechanical analysis Condensed Matter Physics Atomic packing factor Viscosity Rheology Mechanics of Materials General Materials Science Particle size Composite material Shear flow Elastic modulus
Zdroj:	Journal of Rheology. 32:751-771
ISSN:	1520-8516 0148-6055
DOI:	10.1122/1.549991
Popis:	An investigation was undertaken to study the influence of a bimodal size distribution of particulates on the shear viscosity, primary normal stress coefficient, dynamic viscosity, and storage modulus of filled polymeric systems. As expected, all four rheological properties of the composite systems with a bimodal size distribution of solids were reduced in comparison to the properties of the composite systems with a unimodal size distribution of particulates. In addition, the maximum packing fraction was increased when the modality of the solids mixtures was increased. The present research effort showed that a design equation given by Ouchiyama and Tanaka and used by Gupta and Seshadri allows the a priori prediction of the maximum packing parameter as a function of particle size and size distribution. Consequently, it was possible to calculate an optimum reduction of rheological properties due to a bimodal size distribution of particulates that was in agreement with experimental results.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::917853f6bff2235c7892759903bd9ff7 https://doi.org/10.1122/1.549991 Zobrazit plný text záznamu