In this study, microcapsules were synthesized with an initiator core consisting of a free-radical initiator (cumene hydroperoxide) and their leakage/storage properties within different storage media were analyzed. The leakage properties were analyzed by storing the capsules in various solvents of differing polarity, and periodically testing the solvent media using gas chromatography (GC) to analyze the percentage of leaked initiator present. Degree of crosslinking of the shells can be controlled through using different amines and/or adjusting the amine:isocyanate ratio when synthesizing the capsules; GC analysis showed the effects of altering the shell crosslinking on core leakage when stored under different conditions.

Effects of crosslinking on polyurea-shell microcapsules containing a free-radical initiator core

2019 Spring National Meeting

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