Nanocomposites of Polyhydroxyurethane with POSS Microdomains: Synthesis via Non-Isocyanate Approach, Morphologies and Reprocessing Properties

• Main Authors: Hang, G. (Author), Li, L. (Author), Liu, W. (Author), Mei, H. (Author), Zheng, S. (Author)
• Format: Article
• Language: English
• Published: MDPI 2022
• Subjects: Carbonation; Cyclic carbonates; Difunctional; five-membered cyclic carbonate; Five-membered cyclic carbonate; High resolution transmission electron microscopy; Micro-domains; Microphase separated; nanocomposites; Nanocomposites; polyhydroxyurethane; Polyhydroxyurethane; POSS; Property; reprocessing properties; Reprocessing property; Synthesised
• Online Access: View Fulltext in Publisher

 In this contribution, we reported the synthesis of a novel trifunctional POSS cyclic carbonate [POSS-3(5CC)]. With a difunctional five-member cyclic carbonate and a trifunctional polyetheramine as the precursor, the nanocomposites of polyhydroxyurethane (PHU) with POSS were synthesized. Transmission electron microscopy (TEM) showed that the nanocomposites of PHUs with POSS were microphase-separated; the spherical POSS microdomains via POSS-POSS interactions were generated with the size of 20~40 nm in diameter. After the introduction of POSS microdomains, the nanocomposites displayed improved thermal and mechanical properties. More importantly, the nanocomposites still displayed the reprocessing properties of vitrimers. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.