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  • Title: A compressibility based model for predicting the tensile strength of directly compressed pharmaceutical powder mixtures.
    Author: Reynolds GK, Campbell JI, Roberts RJ.
    Journal: Int J Pharm; 2017 Oct 05; 531(1):215-224. PubMed ID: 28823886.
    Abstract:
    A new model to predict the compressibility and compactability of mixtures of pharmaceutical powders has been developed. The key aspect of the model is consideration of the volumetric occupancy of each powder under an applied compaction pressure and the respective contribution it then makes to the mixture properties. The compressibility and compactability of three pharmaceutical powders: microcrystalline cellulose, mannitol and anhydrous dicalcium phosphate have been characterised. Binary and ternary mixtures of these excipients have been tested and used to demonstrate the predictive capability of the model. Furthermore, the model is shown to be uniquely able to capture a broad range of mixture behaviours, including neutral, negative and positive deviations, illustrating its utility for formulation design.
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