Novel system for pulse radiolysis with multi-angle light scattering detection (PR-MALLS) – concept, construction and first tests

摘要: Abstract Time-resolved pulse radiolysis, utilizing short pulses of high-energy electrons from accelerators, is an effective method for rapidly generating free radicals and other transient species in solution. Combined with fast time-resolved spectroscopic detection (typically the ultraviolet/visible/near-infrared), it invaluable monitoring reactivity subjected to radiolysis on timescales ranging picoseconds seconds. When used polymer solutions, can be coupled light-scattering detection, creating a powerful tool kinetic mechanistic analysis processes like degradation or cross-linking macromolecules. Changes light scattering intensity (LSI) solutions are indicative alterations molecular weight and/or radius gyration, i.e., dimensions shape In addition methods, LSI technique provides convenient study radiation-induced macromolecules as function time after pulse. Pulse systems employing this mode have been so far constructed follow scattered at single angle right angle) incident beam. Here we present advanced & multi-angle light-scattering-intensity system (PR-MALLS) that has built IARC currently phase optimization testing. Idea its design operation described preliminary results pullulan well polymerization crosslinking poly(ethylene glycol) diacrylate presented. Implementation proposed novel research tool, which expected contribute expansion knowledge free-radical reactions monomer- by delivering precise data changes size, thus allowing formulate verify reaction mechanisms. The universal applied studying both natural synthetic polymers. developed also valuable studies border biology medicine, especially radical biopolymers their conformational transitions. Furthermore, capability mass nanobjects may significant importance nanoscience nanotechnology.