5. Using threshold polymerization kinetics

5.1 N-source process

Figure 3 shows the classic kinetics of free-radical chain polymerization under continuous light excitation, with virtually zero speed as long as the inhibitors present in the reactive zone have not been consumed. Under these conditions, by using several light beams from different directions in space and with controlled local amplitudes, it is possible to reach any point in space with light intensities either below threshold or above. Since polymerization does not involve any significant spatial broadening (a few nanometers...