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- W4280497329 endingPage "124971" @default.
- W4280497329 startingPage "124971" @default.
- W4280497329 abstract "The rapid development of covalent adaptable networks or vitrimers shows promise for addressing the long-standing recycling issues associated with conventional, permanently cross-linked thermosets. At the same time, it is important to demonstrate that properties of reprocessable polymer networks can be optimized to meet the ongoing demand for high-performance materials. We have fabricated reprocessable polyhydroxyurethane (PHU) network composites reinforced with reactive polyhedral oligomeric silsesquioxanes (POSS). With functionalized POSS serving as a fraction of the cross-linkers, the PHU–POSS network nanocomposites exhibit significantly enhanced storage modulus at the rubbery plateau region relative to the neat PHU network. With up to 10 wt% POSS loading, these network composites can undergo melt-state reprocessing at 140 °C with 100% property recovery associated with cross-link density. We also show that hydroxyurethane dynamic chemistry leads to excellent creep resistance at elevated temperature up to 90 °C and is unaffected by reactive incorporation of POSS. This study demonstrates the effectiveness of POSS as nanofillers for designing high-performance, organic−inorganic dynamic PHU networks with excellent reprocessability." @default.
- W4280497329 created "2022-05-22" @default.
- W4280497329 creator A5000321816 @default.
- W4280497329 creator A5005755652 @default.
- W4280497329 creator A5008171524 @default.
- W4280497329 creator A5026906314 @default.
- W4280497329 creator A5075531605 @default.
- W4280497329 date "2022-06-01" @default.
- W4280497329 modified "2023-10-01" @default.
- W4280497329 title "Reprocessable polyhydroxyurethane networks reinforced with reactive polyhedral oligomeric silsesquioxanes (POSS) and exhibiting excellent elevated temperature creep resistance" @default.
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- W4280497329 doi "https://doi.org/10.1016/j.polymer.2022.124971" @default.