Hongxia Feng, Mohamad Al-Sheikhly, Joseph Silverman, Douglas E. Weiss and Pedatsur Neta
The bulk polymerization of 2-ethylhexyl acrylate (2-EHA), induced by a pulsed electron beam, was investigated with pulse radiolysis, gravimetry, and Fourier transform infrared spectroscopy. The roles of the dose rate, pulse frequency, and added acrylic acid (AA) in the polymerization of 2-EHA were examined at ambient temperature. In the range of 12.6–71.2 Gy/pulse, the polymerization of 2-EHA was dose-rate-dependent. Also, a lower pulse rate gave a higher conversion at the same total dose. The addition of AA enhanced the yield only at higher conversions of 2-EHA. The values for kp(G/2kt)1/2 and 2ktG (where kp is the rate constant of propagation, kt is the rate constant of bimolecular termination, and G is the yield of free radicals) were estimated at relatively low conversions.