A streamlined synthetic scheme was developed for the preparation of a novel series of cationically polymerizable epoxy-functional organic-inorganic hybrid resins. The reaction sequence consists, first, of the regioselective rhodium-catalyzed monoaddition of an R,ω-Si-H difunctional siloxane to a vinyl epoxide. The second step involves the addition of the remaining Si-H bond of the latter adduct to vinyl trimethoxysilane. Finally, an ion-exchangecatalyzed sol-gel hydrolysis of the resulting trialkoxysilane-functional epoxide yields the desired silicone-epoxy resins bearing pendant epoxy groups. These resins undergo facile UV and thermally induced cationic photopolymerization in the presence of onium salt photoinitiators to give cross-linked organic-inorganic hybrid glassy matrixes. The mechanical and thermal properties of the polymerized resins were determined and were correlated with the structures of the resins.
PSS, ITO, or both of them were systematically examined. Among the films, the AgNW-PEDOT:PSS-ITO hybrid film exhibits a high transmittance (88%) and a low sheet resistance (44 Ω sq(-1)) with a small haze (1.9%). Moreover, the hybrid films show excellent durability to a variety of environmental stresses. By virtues of the high performance and durability, it is believed that the AgNW-PEDOT:PSS-ITO hybrid electrodes are highly suitable for practical use.
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