Viscosity of particle filled polymer melts

Kataoka, Tadao; Kitano, Takeshi; Sasahara, Masakatsu; Nishijima, Kiyoto

doi:10.1007/bf01517705

Cited by 165 publications

(57 citation statements)

References 11 publications

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“…[339][340][341]) the authors sought to superimpose graphically the flow curves of filled melts and polymer solutions with different filler concentrations; however, it was only possible to do so at high shear stresses (rates). More often than not it was impossible to obtain a generalized viscosity characteristic at low shear rates, the obvious reason being the structurization of the system.…”

Section: Rheological Properties Of Composites With Polymerization-modmentioning

confidence: 99%

Filled polymers: Mechanical properties and processability

Enikolopyan

Fridman

Stal'nova

et al. 1990

Filled Polymers I Science and Technology

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In this review the wide spectrum of properties of filled polymer systems is generalized. Classical and modern conceptions dealing with the influence of the boundary layer and filler on melting and crystallization of the polymer matrix. Polymer properties in the melted and condensed state are considered, attention being given to the influence of the filler particle size and shape, the nature of its surface, its structure, and agglomeration on the theological and mechanical characteristics of composites.Data on structure and properties of filled thermoplastic composites are summarized for the first time. Special attention is paid to the peculiarities of composites with modified polymerized filler behavior during rheological and mechanical testing and processing of such composites. IntroductionPolymeric composite materials (PCM) belong to one of the most important classes of structural materials attracting ever growing interest, as manifested by the huge flow of published scientific and technical information dealing with the problems of developing, preparing, processing and using PCM [1]. Whereas the oil and gas fuel crisis has receded recently, the problem of their restrained use still remains an urgent one if only because the oil and gas reserves are not unlimited and practically non-reproducible. Estimates by specialists have shown [2,3] that the development of PCM with a view to cut the consumption of polymeric materials can only be economically feasible if not less than 15% by volume of the filler are added.Waste products from a number of commercial processes can be used as cheap and readily available fillers for PCM. For example, lightweight structural materials may be obtained by filling various low-viscous resins with waste materials [4,5]. Also by adding fillers to reprocessed polymers it is possible to improve their properties considerably and thus return them to service [6]. This method of waste utilization is not only economically feasible but also serves an ecological purpose, since it will help to protect the environment from contamination. The maximum percentage of the filler should in these cases be such as to assure reliable service of the article made from the PCM under specified conditions for a specified period of time.However, the chief purpose of introduction of fillers into PCM is to make possible the modification of polymers and thereby create materials with a prescribed set of physico-mechanical properties, and, obviously, the properties of filled materials may be controlled by, for example, varying the type of the base polymer (the "matrix") and filler, its particle size distribution and shape. It may not require a large quantity of filler [7]. Thanks to considerable advances in PCM research, their use in a broad range of industries -machine building, construction, aerospace technology, etc. -has become extensive [8][9][10][11].Development of an assortment of polymeric composite materials, decSsions concerning their possible scope of applicability and service conditions involve research in...

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Section: Rheological Properties Of Composites With Polymerization-modmentioning

confidence: 99%

Filled polymers: Mechanical properties and processability

Enikolopyan

Fridman

Stal'nova

et al. 1990

Filled Polymers I Science and Technology

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“…The results, conducted by Friedrich et al, 5 showed that the thermorheological properties of polystyrene melts filled with grafted and ungrafted glass beads follow the WLF behavior. Kataoka et al 6 measured the viscosities of LDPE and PS filled with glass beads and sisals, respectively, at low shear rates with a cone-plate rheometer. Apart from the relative viscosity ( r ) being in accord with the equations derived by Maron and Pierce or by Mooney, the particle size distribution had an effect on r .…”

Section: Introductionmentioning

confidence: 99%

Rheological properties of glass bead-filled low-density polyethylene composite melts in capillary extrusion

Liang

1999

J. Appl. Polym. Sci.

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ABSTRACT:The melt flow of glass bead-filled low-density polyethylene composites in extrusion have been observed by using a capillary rheometer to investigate the effects of temperature, shear rate, and filler content on the rheological properties of the melts. The results show that the melt shear flow obeys a power law, and the dependence of the apparent shear viscosity, app , on temperature is in accord with an Arrhenius equation. At the same temperature and shear rate, app increases slightly with increasing the volume fraction of glass beads, but the flow behavior index decreases with increasing filler content. In addition, the first normal stress difference of the melts linearly increases with increasing wall shear stress. Good agreement is shown with the N 1 calculated with the equation presented in this article and the pressured data from the sample melts.

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“…Further, the relative viscosity decreases with increasing shear rate for the volume fraction range of 0 to 0.26. Sundstrom (1983) extended the Kataoka et al (1978) simple correlation of viscosities of filled polymers to suspensions of particles in polymeric solutions. Relative viscosities defined at the same shear stress have been correlated with volume fraction by the one-constant equation of Maron and Pierce (1956).…”

Section: Alche Journalmentioning

confidence: 98%

Rheological properties of Hydroxypropyl Guar (HPG) slurries

Shah

1993

AIChE Journal

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Viscosity of particle filled polymer melts

Cited by 165 publications

References 11 publications

Filled polymers: Mechanical properties and processability

Filled polymers: Mechanical properties and processability

Rheological properties of glass bead-filled low-density polyethylene composite melts in capillary extrusion

Rheological properties of Hydroxypropyl Guar (HPG) slurries

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