Wang, Yachen; Gao, Mingxing; Li, Sai; Liu, Jun; Feng, Anchao; Zhang, Liqun published the artcile< Recyclable, self-healable and reshape vitrified poly-dimethylsiloxane composite filled with renewable cellulose nanocrystal>, Formula: C19H34O2, the main research area is recyclable self healable vitrified polysiloxane composite renewable cellulose nanocrystal.
Traditional thermoset polymeric materials pose an enormous burden on the environment due to permanent covalent crosslinks that make them difficult to reprocess or recycle. Herein, we describe the facile synthesis of recyclable, healable and reprocessable poly-dimethylsiloxane (PDMS)/cellulose nanocrystals (CNC) composites via engineering dynamic covalent bond (DCB) vinylogous urethane between the polymer-polymer and polymer-CNC. We successfully prepared the amine-modified CNC, evidenced by the anal. of FTIR, XPS and Element anal., and its surface morphol. as well as its size compared to the pristine one is not altered via XRD and TEM anal. The DCBs are constructed not only between polymer chains, but also on the interface between polymer and CNC. Interestingly, the macromol. cross-linker synthesized by RAFT polymerization significantly improves the mech. properties of PDMS-based CNC vitrimer, without affecting its recycling and reprocessing properties. Remarkably, DCB vinylogous urethane endows this vitrimer good self-healing, reprocessing and recycling and this DCB can be effectively reshaped by the catalyst-free transamination of the vinylogous urethane through hot pressing or welding. It is emphasized that this macromol. crosslinker containing β-keto acids obtained by RAFT polymerization can significantly broaden the application range for DCB vinylogous urethane. In general, this work could provide a facile approach to design and fabricate high performance renewable CNC based composites with excellent self-healing, reprocessing and recycling capabilities.
Polymer published new progress about Binding energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics