Polyhedral oligomeric silsesquioxane-based hybrid networks obtained via thiol-epoxy click chemistry

摘要: A series of hybrid networks based on polyhedral oligomeric silsesquioxane (POSS) were prepared by thiol-epoxy click reaction using commercially available octakis-glycidyl-POSS (G-POSS), trimethylolpropane triglycidyl ether, and tris(3-mercaptopropionate) as monomers. The was simply catalyzed lithium hydroxide which proceeded readily at ambient conditions in very good yields. incorporation G-POSS into the network clearly determined transmission electron microscopy, FTIR, 1H-NMR spectroscopy techniques performed with a model study 1-butane thiol molecules. homogeneous distribution up to 5 wt% apparently confirmed morphological investigations. By increasing content higher than wt%, heterogeneous dispersion from tensile strength measurements. significant decrease possible due agglomeration G-POSS. On other hand, thermal properties compared together thermogravimetric analyses, where all samples exhibited one-step degradation range 220–500 °C. decomposition led complete organic part favored formation stable carbonaceous inorganic residues char. Thus, char yields increased 6.2, 7.8, 10.1, 12.7, 15.1% loadings 0 15 wt%. This improvement also proof that resulted high heat-resistant POSS-based sample without