Tailored modular assembly derived self-healing polythioureas with ...
2022年5月12日 · To impart self-healing polymers largely adjustable dynamicity and mechanical performance, here we develop libraries of catalyst-free reversible polythioureas directly from commodity 1,4-phenylene...
Catalyst-Free Construction of Versatile and Functional CS2-Based ...
2019年11月4日 · The aliphatic polythiourea P4 was examined for its ability as a heavy metal absorbent, effectively sequestering Hg 2+ ions with greater than 99.9% efficiency. Hence, this study provides an easily accessible method for synthesizing various polythioureas with diverse structures and functionalities.
Stiff, tunable and reprocessable polythiourea supramolecular …
2024年1月5日 · Hydrogen-bonded polythiourea materials with tunable mechanical performances were achieved by adjusting the density and regularity of thiourea units in the polymer chains.
Strongly Dipolar Polythiourea and Polyurea Dielectrics with High ...
2014年9月23日 · High energy density (>24 J/cm 3), high breakdown strength (>800 MV/m), and high charge–discharge efficiency (>90%) can be achieved in the new polymers. The molecular structure and film surface morphology were also studied; it is of great importance to optimize the fabrication process to make high-quality thin films.
The C−N bond of thiourea unit in polythioureas20 is allowed to be involved in catalyst-free dissociation/association owing to the weak electron-withdrawing tendency of sulfur atom that diminishes...
Here, we demonstrate an approach, based on the Dissado-Hill dielectric response model, to probe the dynamics of dipole polarization in an all organic polythiourea (PDTC-HK511) composed of p-phenylene diisothiocyanate (PDTC) as rigid segments and JeffamineVR HK511 as flexible segments.
Composite of aromatic polythiourea/BaTiO3 nanowires with high …
2021年7月6日 · In this article, the BaTiO3 (BT) nanowires (NWs) modified with dopamine (Dopa) was introduced into aromatic polythiourea (ArPTU) polymer matrix as composite for high-performance dielectrics. This is a new path about the introduction of a high dielectric constant ceramic into high dipole moment linear polymers (HDMLP), which produces the polymer ...
Different solvents accompanied by different structures: Catalyst …
2024年5月15日 · In this study, tris (2-aminoethyl)amine and carbon disulfide were used as raw materials for the construction of highly branched polythioureas. Firstly, a highly branched polythiourea adsorbent was synthesized through a heating condensation reaction using N, N-dimethylformamide (DMF) as solvent without any catalyst.
Upcycling of dynamic thiourea thermoset polymers by intrinsic
2022年1月19日 · Thermoset polymers are indispensable but their environmental impact has been an ever-increasing concern given their typical intractability. Although concepts enabling their reprocessing have been...
Thioureas Bridged Polysiloxanes for Ultrafast Detection of Cr
2021年4月19日 · In this report, a new synthetic method is presented to construct poly (siloxane-thioureas) (PTUs) via a simple and economic “one-pot” method. The optical properties of PTUs are mainly investigated by the ultraviolet absorption spectrum and fluorescence spectrum.