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

Weiming Liu; Guohua Hang; Honggang Mei; Lei Li; Sixun Zheng

doi:10.3390/polym14071331

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

Polymers (Basel). 2022 Mar 25;14(7):1331. doi: 10.3390/polym14071331.

Authors

Weiming Liu¹, Guohua Hang¹, Honggang Mei¹, Lei Li¹, Sixun Zheng¹

Affiliation

¹ Department of Polymer Science and Engineering, The State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China.

Abstract

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.

Keywords: POSS; five-membered cyclic carbonate; nanocomposites; polyhydroxyurethane; reprocessing properties.

Grants and funding

51973113, 51133003 and 21774078/National Natural Science Foundation of China