Multifunctional POSS Cyclic Carbonates and Non-Isocyanate Polyhydroxyurethane Hybrid Materials

Abstract

The solvent-free chemical fixation of carbon dioxide with glycidyl ether functionalized polyhedral oligomeric silsesquioxanes (POSS) yields mono-and polydisperse multifunctional POSS cyclic carbonates. The silica equivalent content of POSS carbonates varies between 28.5 and 42.1 wt %, whereas 15.4−20.8 wt % carbon dioxide is incorporated. On cure with hexamethylenediamine and isophoronediamine, POSS carbonates and their blends with polyol-based cyclic carbonates produce organic/inorganic hybrid polyhydroxyurethane thermosets without requiring the need of isocyanate monomers. These blends prolong both gel and pot life time of NIPU formulations, thus allowing the preparation of tailored NIPU/POSS hybrid materials for casting and coating applications. Young's modulus and tensile strength improve with increasing POSS content as a result of higher cross-link density and silica content. Submicron phases are formed during polymerization due to self-assembly and nanophase separation as was verified by scanning electron microscopy (SEM). Moreover, the incorporation of POSS significantly improves scratch resistance of optically transparent and colorless NIPU/POSS coatings as examined by the surface gloss and SEM images.

Simple Green Synthesis and Electrochemical Performance of a New Fluorinated Carbonate as Additive for Lithium‐Ion Batteries

“…The compound was synthesized according to Scheme ,. The commercially available oxirane (2‐(2,2,3,3,4,4,5,5,5‐nonafluoro‐pentyl)‐oxirane) was placed together with LiBr in a MiniClave reactor.…”

“…Synthesis and Chemical Characterization [53] The compound was synthesized according to Scheme 2. [54,55] The commercially available oxirane (2-(2,2,3,3,4,4,5,5,5-nonafluoro-pentyl)-oxirane) was placed together with LiBr in a MiniClave reactor. Thereafter the reactor was held at 100 8C and a pressure of 30 bar CO 2 .…”

Promising approaches to improve the performances of hybrid non‐isocyanate polyurethane

“…In order to solve these shortcomings, many groups have put effort into the development of highly efficient catalysts for the synthesis of NIPU as well as studying the structure–performance relationship of NIPU . Besides, the incorporation of fillers, such as silicone backbones, ZnO, graphene oxide and carbon nanotubes, is also carried out to enhance the performance of NIPU.…”

Partially bio‐based tri‐ and hexaallyl monomers: Synthesis from naturally occurringmyo‐inositol and polyaddition with dithiols

“…Networked polymers have been used as indispensable materials for a wide range of applications, including adhesives, sealants, and coatings . The synthesis of networked polymers relies on two major strategies: crosslinking of linear polymers with reactive side chains, and polymerization of multifunctional monomers, that is, molecules bearing multiple reactive groups . In the latter strategy, not only appropriate choices of reactive groups, but also their numbers, locations, and the structures of the core part to which those reactive groups are attached, are essential factors in designing multifunctional monomers.…”

“…4,5 The synthesis of networked polymers relies on two major strategies: crosslinking of linear polymers with reactive side chains, [6][7][8][9][10][11][12][13] and polymerization of multifunctional monomers, that is, molecules bearing multiple reactive groups. [14][15][16][17][18][19][20] In the latter strategy, not only appropriate choices of reactive groups, but also their numbers, locations, and the structures of the core part to which those reactive groups are attached, are essential factors in designing multifunctional monomers. These factors depend largely on the structure of the starting material used for the synthesis of multifunctional monomers.…”