DEAEMA was passed through a basic aluminium oxide column twice to remove any protic impurities. To eliminate moisture, the DEAEMA was mixed with CaH2 and stirred for 2 hours at least 3 days before polymerization. DPPH was also added as a free-radical inhibitor. For PEGMA, a 50% vol PEGMA and 50% vol THF solution was prepared. This was passed through the basic aluminium oxide column twice, then stirred under argon with CaH2 for two hours. When finished, DEAEMA and PEGMA solution with THF were purged with Argon and refrigerated. DEAEMA and MTS were distilled one day before polymerisation to remove the free-radical inhibitor and any other impurities, under vacuum to eliminate moisture.