Characterizing CaCO3 particle dispersion in blown film

Author:

Radebe Lucky1,Wesley-Smith James2,Focke Walter Wilhelm1ORCID,Ramjee Shatish1

Affiliation:

1. Department of Chemical Engineering , University of Pretoria , Lynwood Road, Hatfield , Pretoria 0102 , South Africa

2. Electron Microscope Unit , Sefako Makgatho Health Sciences University , Ga-Rankuwa , South Africa

Abstract

Abstract A novel method for the visualization and quantification of the state of dispersion of calcium carbonate particles in thin blown polymer films is described. Particle imaging was achieved by elemental mapping using energy dispersive spectroscopy. This generated outlines of particles and agglomerates located close to the film surface. ImageJ software facilitated the extraction of the corresponding Feret diameters. Finally, the Bootstrap technique was used to estimate confidence intervals for the kurtosis of the Feret particle size distribution. Kurtosis is a statistic that describes the shape of a distribution’s tails in relation to its overall shape. It therefore provides a measure that characterizes the degree of particle agglomeration. The proposed procedure was applied to analyze high-density polyethylene films prepared using different calcium carbonate masterbatches in which formulation parameters were varied.

Funder

Sasol, South Africa

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,Polymers and Plastics,General Chemical Engineering

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