Designing for effective controlled release in agricultural products: new insights into the complex nature of the polymer-active agent relationship and implications for use.

The lower percolation threshold for this combination of materials lies between 200 and 400 g kg-1 DCD loading. The grind size fraction of DCD significantly affects the quantity of burst release from the surface of the pellet, particularly below the lower percolation threshold. The results presented here are likely translatable to the encapsulation and release of other crystalline materials from hydrophobic polymer matrices used in controlled release formulations, such as fertilizers, herbicides and pesticides. © 2020 Society of Chemical Industry.