Table 1: Apparent first-order rate constants ( ) for the polymerization of HEMA in water and organic solvents.

SolventDielectric constanta (25°C)Viscositya (mPa·s)−1
RFCQST

Water78.51.0005.054.042.98
Acetonitrile37.52.8983.713.022.10
Methanol32.61.8383.532.901.93
Ethanol24.30.9313.122.621.71
1-Propanol20.10.5142.451.56
1-Butanol17.10.3932.391.45

CRC Handbook of Chemistry and Physics, 90th edition, CRC Press, Boca Raton, FL, 2010.
The values of rate constants are relative and depend on specific experimental conditions including light intensity.