Table 1.

Comparison of threshold eosin solution concentrations for 5% conversion by 20 minutes with various monomer formulations and reaction conditions. All formulations are in water and contain 35 mM VP. PEGDA, when used, is 420 mM. Acrylamide, when used, is 5.2 M acrylamide and 130 mM bisacrylamide. MDEA and Ascorbic acid, when used, are 210 mM.

Coinitiator	Monomer formulation	pH	Argon	Oxygen	Threshold Eosin Solution Concentration (µM)	Double Bond Conversion at 20 min.
MDEA	PEGDA	9	+		0.03	0.22 +/− 0.03
MDEA	Acrylamide	9	+		0.03	0.07 +/− 0.01
Ascorbic Acid	Acrylamide	4	+		>30	0.02 +/− 0.003
Ascorbic Acid	Acrylamide	4		+	30	0.21 +/− 0.07
none	PEGDA	9	+		3	0.05 +/− 0.005
none	Acrylamide	9	+		3	0.06 +/− 0.003
none	Acrylamide	4	+		30	0.25 +/− 0.03
none	Acrylamide	4		+	>30	0.00 +/− 0.001