Diffusion of Macromolecules in Dextran Methacrylate Solutions and Gels As Studied by Confocal Scanning Laser Microscopy

摘要: This paper reports the results and interpretation of rheological experiments on diffusion measurements fluorescent polymer chains in solutions gels dextran (dex) derivatized with methacrylate (ma) groups. We illustrate use confocal scanning laser microscopy (CSLM) fluorescence recovery after photobleaching (FRAP) to study mobility large molecules systems. The main aim was understand influence network molecules. Therefore we measured coefficients before cross-linking (dex−ma) chains. Increasing dex−ma concentration did not spectacularly increase sterical hindrance by network. However, become significantly stronger when size diffusing probe degree ma substitution were increased. probes decreased became more elastic. decrease dif...