Optical diffusion diagnostics of evolving polymer foams

Various approaches to the optical diagnostics of evolving polymer foams formed as a result decrease in external pressure according given scenario "polymer-supercritical fluid" systems are considered.Formed considered material platform for creation scaffolds biomedical applications. Diagnostics current state foam was carried out by statistical analysis spatiotemporal fluctuations probe laser radiation,multiple scattered volume foam, or analyzing fluorescent response during foaming "polymer-fluorophore" mixture, pumped radiation absorption band fluorophore. A relationship has been established between average lifetime dynamic speckles light and generalized parameter characterizing expansion dynamics. It also found that waveguide effect walls pores significant influence on leading an increase characteristic dwell time fluorescence and, accordingly, contribution induced component response. Keywords: response, speckle correlometry, polylactide, foaming, supercritical carbon dioxide.