Polymer Properties Affecting Drug Release from Matrix Systems

4 Polymer Properties Affecting Drug Release from Matrix Systems 

In-depth knowledge of properties of the polymers employed in the manufacture of matrix systems is always necessary due to the high impact they have on their behavior. The polymer properties showing more influence on the drug release are considered in this section. 

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The purpose of this chapter is to provide a description of the different types of polymeric matrices existing in the market and how the properties of the principal polymers employed in their manufacture affect the drug release. Furthermore, the main concepts of percolation theory are exposed in order to explain the critical points influencing the drug release from matrix systems. 

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