Mapesa, Emmanuel U.; Street, Dayton P.; Heres, Maximilian F.; Kilbey, S. Michael; Sangoro, Joshua published the artcile< Wetting and Chain Packing across Interfacial Zones Affect Distribution of Relaxations in Polymer and Polymer-Grafted Nanocomposites>, Category: thiazole, the main research area is wetting chain packing interface distribution PMMA silica graft nanocomposite.
Polymers exhibit deviations from their bulk phys. properties in the vicinity of solid interfaces due to changes in configurations, entanglements, and relaxation dynamics at the interfacial regions. By comparing grafted and nongrafted polymer nanocomposite systems based on poly(Me methacrylate) and silica, we show that the distribution of relaxation times exhibits both commonly reported slower mobility and faster modes that depend on the nature of the interfacial zone, matrix mol. weight, and loading level of nanomaterials. These findings are derived from studies using broadband dielec. spectroscopy (BDS) and differential scanning calorimetry (DSC) to probe mol. and interfacial dynamics. By systematically examining nanocomposites based on nonfunctionalized “”bare”” Si nanoparticles (NPs) dispersed in PMMA matrixes and on PMMA-grafted Si NPs (PMMA-g-NPs) in PMMA matrixes, we probe the effects of interfacial interactions and confinement in each of these cases on the glass transition temperature, Tg, the mean time scales, and spectral shapes of the dielec. relaxation. The faster relaxation modes are attributed to the increasing importance of chain wetting and packing in the interfacial zones around nanofillers, especially in the polymer-grafted system. These insights are used to generate a unifying mol. framework that explains the enhancement in numerous macroscopic phys. properties of polymer and polymer-grafted nanocomposites, which suits them for myriad applications.
Macromolecules (Washington, DC, United States) published new progress about Dielectric loss. 96-53-7 belongs to class thiazole, and the molecular formula is C3H5NS2, Category: thiazole.
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica