Reprocessable polyhydroxyurethane networks reinforced with reactive polyhedral oligomeric silsesquioxanes (POSS) and exhibiting excellent elevated temperature creep resistance

Hu, Sumeng; Chen, Xi; Bin Rusayyis, Mohammed A.; Purwanto, Nathan S.; Torkelson, John M.

doi:10.1016/j.polymer.2022.124971

Reprocessable polyhydroxyurethane networks reinforced with reactive polyhedral oligomeric silsesquioxanes (POSS) and exhibiting excellent elevated temperature creep resistance

Journal Article · Mon May 16 00:00:00 EDT 2022 · Polymer

DOI:https://doi.org/10.1016/j.polymer.2022.124971· OSTI ID:1977592

Hu, Sumeng ^[1]; Chen, Xi ^[2]; Bin Rusayyis, Mohammed A. ^[2]; Purwanto, Nathan S. ^[2]; ^[2]

Northwestern University, Evanston, IL (United States); OSTI
Northwestern University, Evanston, IL (United States)

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. In conclusion, this study demonstrates the effectiveness of POSS as nanofillers for designing high-performance, organic-inorganic dynamic PHU networks with excellent reprocessability.

View Accepted Manuscript (DOE)

Research Organization:: Northwestern University, Evanston, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)

Grant/Contract Number:: EE0008928

OSTI ID:: 1977592

Alternate ID(s):: OSTI ID: 1869367

Journal Information:: Polymer, Journal Name: Polymer Journal Issue: C Vol. 252; ISSN 0032-3861

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Reprocessable polyhydroxyurethane networks reinforced with reactive polyhedral oligomeric silsesquioxanes (POSS) and exhibiting excellent elevated temperature creep resistance

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