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- W2949221995 abstract "Organic-inorganic nanostructured materials have drawn much attention over the past decade, particularly due to their versatile and outstanding properties. Possessing the properties between those of polymers and those of glasses, siloxane-based resins are non-toxic, easy to synthesize and process hybrid materials, that hold a promising potential in the field of advanced coatings. Photocurable resins are nowadays widely used as coatings due to their unique advantages. In particular, cationic ring-opening curing is not inhibited by oxygen, leads to low degree of shrinkage and superior adhesion. The most important, it enables production of high-quality coatings within short exposure times without applying temperature, thus, minimizing the presence of the thermal stress in the substrate. Photocured Cycloaliphatic-Epoxy Oligosiloxane (CEO) resin was reported to be used as encapsulation material for organic electronics. However, further reinforcement of CEO properties is desired to achieve requested device lifetime. One of the common approaches to improve material characteristics is by embedding inorganic nanoparticles into polymer matrix. It has been shown that the resulted nanocomposites exhibit enhanced functional properties included but not limited by optical, mechanical, thermal and barrier ones. In this work we focused on the incorporation of Boehmite nanoparticles (BA) into CEO matrix as a tool to strengthen the film properties and to study the main changes occurred in the material behavior with regard to its photocuring kinetics, thermal stability and glass transition. Particular interest was focused on the role of particle surface in nanocomposite properties. Hence, BA particles without (HP14) and with organic surface modifier (OS1) at different loadings (up to 10 wt%) were applied in this study. Morphology investigation with SEM operated in transmission mode showed good BA dispersion forming network-like structure. At the same time, distribution of particles differed for HP14 and OS1 as a result of different interaction in CEO-solvent-particles system. CEO structure obtained via non-hydrolytic sol-gel reaction was verified by 13C and 29Si NMR. In situ monitoring of film curing was performed using RT-IR spectroscopy. A slight increase of final convention degree with particle incorporation was observed in contrast to the considerable decrease of curing efficiency reported previously for similar system. Further, the cured hybrid nanocomposite films were analyzed by TGA and DSC, which revealed impact of surface modifier on thermal stability and glass transition temperature." @default.
- W2949221995 created "2019-06-27" @default.
- W2949221995 creator A5091386552 @default.
- W2949221995 date "2018-01-01" @default.
- W2949221995 modified "2023-09-27" @default.
- W2949221995 title "Influence of Boehmite nanofiller on the properties of cycloaliphatic-epoxy oligosiloxane resin coatings" @default.
- W2949221995 hasPublicationYear "2018" @default.
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