Recent studies of particle packing in organic coatings

Gordon Bierwagen; Randy Fishman; Tim Storsved; Joel Johnson

doi:10.1016/S0300-9440(98)00054-X

Recent studies of particle packing in organic coatings

Gordon Bierwagen, Randy Fishman, Tim Storsved, Joel Johnson

Research output: Contribution to journal › Conference article › peer-review

37 Scopus citations

Abstract

Organic coatings often contain sufficient pigmentation that the pigment volume concentration (PVC) and the critical PVC (CPVC) must be carefully considered. Past work has shown that the CPVC can be identified with the random densest packing of pigment particles after considerations of the adsorbed polymer layer on the particles is taken into account, and that this packing can be predicted by empirical particle packing algorithms developed for mixtures of particle sizes. Recent studies have shown that local fluctuations of pigment and polymer concentrations in a film can lead to local film volumes that can exceed the CPVC even though the average PVC for the whole film (the global PVC) is below the CPVC. These effects are consistent with observations of void formation in films below the CPVC, and can be analyzed by local film statistics. We have also recently performed simulations of particle packing by the compression of multiple hard spheres that allows further insight into local concentration fluctuations in PVC within a film.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Progress in Organic Coatings
Volume	35
Issue number	1-4
DOIs	https://doi.org/10.1016/S0300-9440(98)00054-X
State	Published - Aug 1 1999
Externally published	Yes
Event	Proceedings of the 1998 24th International Conference in Organic Coatings: Waterborne, High Solids and Powder Coatings - Vouliagmeni, Greece Duration: Jul 6 1998 → Jul 10 1998

Funding

G.P.B. and J.J. would like to acknowledge the support of the National Science Foundation Coatings Research Center and the U.S. Army Coating Group, and the Air Force Research Laboratory at WPAFB. One of us (R.F.) would like to acknowledge support from Oak Ridge National Laboratory, managed by Lockheed Martin Energy Research Corp. for the U.S. Department of Energy under Contract No. DE-AC05–960R22464.

Funders	Funder number
Lockheed Martin Energy Research Corp.
National Science Foundation Coatings Research Center
U.S. Army Coating Group
U.S. Department of Energy
Oak Ridge National Laboratory
Air Force Research Laboratory

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abstract = "Organic coatings often contain sufficient pigmentation that the pigment volume concentration (PVC) and the critical PVC (CPVC) must be carefully considered. Past work has shown that the CPVC can be identified with the random densest packing of pigment particles after considerations of the adsorbed polymer layer on the particles is taken into account, and that this packing can be predicted by empirical particle packing algorithms developed for mixtures of particle sizes. Recent studies have shown that local fluctuations of pigment and polymer concentrations in a film can lead to local film volumes that can exceed the CPVC even though the average PVC for the whole film (the global PVC) is below the CPVC. These effects are consistent with observations of void formation in films below the CPVC, and can be analyzed by local film statistics. We have also recently performed simulations of particle packing by the compression of multiple hard spheres that allows further insight into local concentration fluctuations in PVC within a film.",

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AB - Organic coatings often contain sufficient pigmentation that the pigment volume concentration (PVC) and the critical PVC (CPVC) must be carefully considered. Past work has shown that the CPVC can be identified with the random densest packing of pigment particles after considerations of the adsorbed polymer layer on the particles is taken into account, and that this packing can be predicted by empirical particle packing algorithms developed for mixtures of particle sizes. Recent studies have shown that local fluctuations of pigment and polymer concentrations in a film can lead to local film volumes that can exceed the CPVC even though the average PVC for the whole film (the global PVC) is below the CPVC. These effects are consistent with observations of void formation in films below the CPVC, and can be analyzed by local film statistics. We have also recently performed simulations of particle packing by the compression of multiple hard spheres that allows further insight into local concentration fluctuations in PVC within a film.

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Recent studies of particle packing in organic coatings

Abstract

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