A model to simultaneously evaluate the compressibility and compactibility of a powder based on the compression ratio

The present study aimed to establish a new model to evaluate the compressibility and compactibility of materials simultaneously. Eighteen types of pharmaceutical excipients were studied via direct compaction. The model was established as CR = y0 + Ae−bP, r2 ≥ 0.9684 (where CR is the compression ratio and P is the compaction force and y0, A, b is constant). The physical meaning of y0 and b were studied in the model. The results show that y0 has a...