Abstract
• Design and effective synthesis - high conversions (up to 99%) and selectivities (85 – 100%) of hybrid materials based on polysiloxanes cross-linked with double-decker silsesquioxanes. • Different morphology – from oil (plain polysiloxanes) to waxy solids and solids exhibiting swelling ability. • High thermal stability - cross-linked products exhibit - up to 414 ℃ T d 5% in air and 453 ℃ in N 2 . • Gel content in the range 67–96% - confirmation of high efficiency of cross-linking process. • High swelling degree - solvent uptake for CHCl 3 up to 928% and for THF up to 690%. A series of unique organic–inorganic hybrid materials varied in the construction of the applied polysiloxanes and di(alkenyl)functionalized double-decker silsesquioxanes was designed, synthesized and fully characterized by spectroscopic methods. The presented synthetic strategy based on hydrosilylation reaction conditions was optimized to ensure complete Si-H consumption along with the avoidance of side-products enabling the formation of materials with high conversion. The obtained results revealed the influence of the type and content of DDSQ in cross-linked polymers structures on their thermal and swelling properties which has not been reported so far. Our studies can lead to the preparation of specific materials with tailored properties.
Published Version
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