Aggregation Tendency of Particulate Fillers: Determination and Consequences

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3 Citations (Scopus)

Abstract

The agglomeration tendency of 11 commercial CaCO3 fillers with different particle size and specific surface area was investigated by means of various techniques. Some powder characteristics were measured and also the sedimentation of treated, as well as non-treated fillers were determined in water and toluene. Polypropylene (PP) composites containing 25 vol% filler were homogenized in an internal mixer. Melting and crystallization, as well as tensile properties were determined on compression molded plates. Unambiguous determination of aggregation is difficult, since it depends on interaction and experimental conditions. The extent of aggregation is always determined by the relative magnitude of attractive and separating forces under the given sample preparation and/or testing conditions. Observable aggregation begins at 5-7 m2/g specific surface area for the studied fillers, but its extent depends also on their particle size distribution and on surface treatment. Composites with a larger number of aggregates possess inferior mechanical properties, however, the effect depends very much on the characteristics measured.

Original languageEnglish
Pages (from-to)167-186
Number of pages20
JournalPeriodica Polytechnica: Chemical Engineering
Volume42
Issue number2
Publication statusPublished - 1998

Fingerprint

Fillers
Agglomeration
Specific surface area
Polypropylenes
Composite materials
Toluene
Crystallization
Tensile properties
Sedimentation
Particle size analysis
Powders
Surface treatment
Melting
Particle size
Mechanical properties
Water
Testing

Keywords

  • Aggregation
  • CaCO fillers
  • Characterization of aggregation tendency
  • Composites
  • Polypropylene

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

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abstract = "The agglomeration tendency of 11 commercial CaCO3 fillers with different particle size and specific surface area was investigated by means of various techniques. Some powder characteristics were measured and also the sedimentation of treated, as well as non-treated fillers were determined in water and toluene. Polypropylene (PP) composites containing 25 vol{\%} filler were homogenized in an internal mixer. Melting and crystallization, as well as tensile properties were determined on compression molded plates. Unambiguous determination of aggregation is difficult, since it depends on interaction and experimental conditions. The extent of aggregation is always determined by the relative magnitude of attractive and separating forces under the given sample preparation and/or testing conditions. Observable aggregation begins at 5-7 m2/g specific surface area for the studied fillers, but its extent depends also on their particle size distribution and on surface treatment. Composites with a larger number of aggregates possess inferior mechanical properties, however, the effect depends very much on the characteristics measured.",
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T2 - Determination and Consequences

AU - Pukánszky, B.

AU - Fekete, E.

PY - 1998

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N2 - The agglomeration tendency of 11 commercial CaCO3 fillers with different particle size and specific surface area was investigated by means of various techniques. Some powder characteristics were measured and also the sedimentation of treated, as well as non-treated fillers were determined in water and toluene. Polypropylene (PP) composites containing 25 vol% filler were homogenized in an internal mixer. Melting and crystallization, as well as tensile properties were determined on compression molded plates. Unambiguous determination of aggregation is difficult, since it depends on interaction and experimental conditions. The extent of aggregation is always determined by the relative magnitude of attractive and separating forces under the given sample preparation and/or testing conditions. Observable aggregation begins at 5-7 m2/g specific surface area for the studied fillers, but its extent depends also on their particle size distribution and on surface treatment. Composites with a larger number of aggregates possess inferior mechanical properties, however, the effect depends very much on the characteristics measured.

AB - The agglomeration tendency of 11 commercial CaCO3 fillers with different particle size and specific surface area was investigated by means of various techniques. Some powder characteristics were measured and also the sedimentation of treated, as well as non-treated fillers were determined in water and toluene. Polypropylene (PP) composites containing 25 vol% filler were homogenized in an internal mixer. Melting and crystallization, as well as tensile properties were determined on compression molded plates. Unambiguous determination of aggregation is difficult, since it depends on interaction and experimental conditions. The extent of aggregation is always determined by the relative magnitude of attractive and separating forces under the given sample preparation and/or testing conditions. Observable aggregation begins at 5-7 m2/g specific surface area for the studied fillers, but its extent depends also on their particle size distribution and on surface treatment. Composites with a larger number of aggregates possess inferior mechanical properties, however, the effect depends very much on the characteristics measured.

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