Document Type


Date of Award

Spring 5-31-2016

Degree Name

Master of Science in Chemical Engineering - (M.S.)


Chemical, Biological and Pharmaceutical Engineering

First Advisor

Costas G. Gogos

Second Advisor

R. P. T. Tomkins

Third Advisor

Laurent Simon

Fourth Advisor

Nicolas Ioannidis


In the pharmaceutical industrial application field, hot-melt extrusion (HME) has been recently introduced to develop new solid dosage forms and products. By dissolving the poorly–soluble active pharmaceutical ingredients (API) into water-soluble polymers, the bioavailability of the Class II (with low solubility and high permeability in water) API in Biopharmaceutical Classification System (BCS) could be significantly improved in the body. For readily water-soluble API, HME provides a new approach to produce a controlled release drug system. Hence, pharmaceutical HME is a promising processing method in the pharmaceutical industry.

However, HME has not been widely applied into the pharmaceutical industry. The thermal degradation of the polymer (and/or other excipients) and API are major concerns in the pharmaceutical HME process: researchers aim to dissolve the total loading of the API into the excipient within the short residence time with minimal API degradation. Therefore, the kinetics of the dissolving process should be known. In this work, the expression of dissolution process and the impact of shear rate, API concentration and API species in dissolution kinetics are determined. The viscosities of the mixture at different shear rates are also measured. A model API shall be dissolved into a polymeric excipient by conducting melt-mixing experiments using the Brabender Batch Mixer.



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