Related Experiment Video
Updated: May 1, 2026

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
The effect of polymer properties on direct compression and drug release from water-insoluble controlled release
Julia Grund1, Martin Koerber1, Mathias Walther1
1College of Pharmacy, Freie Universität Berlin, Kelchstr. 31, Berlin 12169, Germany.
Abstract:
The objective of this study was to identify and evaluate key polymer properties affecting direct compression and drug release from water-insoluble matrices. Commonly used polymers, such as Kollidon(®) SR, Eudragit(®) RS and ethyl cellulose, were characterized, formulated into tablets and compared with regard to their properties in dry and wet state. A similar site percolation threshold of 65% v/v was found for all polymers in dry state. Key parameters influencing polymer compactibility were the surface properties and the glass transition temperature (T(g)), affecting polymer elasticity and particle size-dependent binding. The important properties observed in dry state also governed matrix characteristics and therefore drug release in wet state. A low T(g) (Kollidon(®) SR
More Related Videos
10:10Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
Published on: August 15, 2016
10:58Combinatorial Synthesis of and High-throughput Protein Release from Polymer Film and Nanoparticle Libraries
Published on: September 6, 2012
Related Concept Videos
Factors Influencing Drug Absorption: Pharmaceutical Parameters
Modified-Release Drug Delivery Systems: Rate-Programmed II
Modified-Release Drug Delivery Systems: Influencing Factors
Factors Affecting Dissolution: Polymorphism, Amorphism and Pseudopolymorphism
Some polymorphic crystals possess lower aqueous solubility than their amorphous counterparts, leading to incomplete absorption. For instance, the oral suspension of Chloramphenicol, which...
Modified-Release Drug Delivery Systems: Rate-Programmed I
Pharmaceutical Alternatives: Polymorphic Form-Related and Particle Size-Related Therapeutic Nonequivalence