Spatial and temporal evolution of the photoinitiation rate in thick polymer systems

摘要: It was once thought either impossible or inefficient to photopolymerize a thickness greater than thin film because of the optical attenuation light into depth sample. However, if several considerations are allowed, it is indeed possible. Three particular modifications essential enhance penetration system. An initiator that absorbs in region spectrum where no other components absorb maximizes incident intensity for photolysis initiator. Concentration and/or molar absorptivity lower typically used films penetration. Finally, photobleaching initiators exhibit decreased absorbance upon and thus allow penetrate more deeply system with time. A need model these systems born out desirability use initiate polymerizations all sorts, including thicker systems. In this project, set differential equations describing spatial temporal evolution gradient, photoinitiator concentration photoinitiation rate profile developed thick polymer The generalized accounts consumption initiator, products photolysis, diffusion products, by components. purpose studies characterize further so results accurately capture process. Several key objectives have been accomplished, effects illumination polychromatic light, various schemes, verification predicative ability model.