Synthesis and characterization of permanently antistatic polyurethanes containing ionic liquids

Abstract

An in situ embed ionic liquid method is designed and employed in thermoplastic polyurethanes (PUs). Unlike the traditional physically incorporated antistatic polymers where conductive fillers do not firmly combined with the matrix. This permanently antistatic PUs are successfully synthesized by using a novel polyester diol bonded with ionic liquids (ILs), which are obtained by an esterification. The ILs and novel polyester polyol are successfully synthesized and subsequently characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance spectrum ( 1 H NMR), respectively. The effects of ILs content, temperature, and relative humidity (RH) on the surface resistivity of PUs are studied by surface resistivity tests. It is found that the surface resistivity of PUs dramatically decreases with the increment of ILs and are insensitive to surrounding environment. The surface resistivity of PUs with 5.96 wt% ILs reaches 10 10 X cm 22 order of magnitude. The crystalline properties, thermal decomposition behaviors and mechanical properties of synthesized PUs are investigated by X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and tensile test respectively. The crystallinity of PUs with ILs is lower than that of pure PUs. Moreover, we also investigate the effect of ILs on the surface morphology of the PUs. POLYM.ENG. SCI., 56:629-635,

Ionic liquid microemulsion‐mediated in situ thermosynthesis of poly(ionic liquid)s and their adsorption properties for Zn(II)

“…Poly(ionic liquid)s, which are polymerized by ionic liquid monomers, present the ionic liquid moiety on each repeated unit . Poly(ionic liquid)s have attracted much attention in the field of adsorption and separation, because they not only inherit the physical and chemical properties such as adjustability, molecular designability and excellent thermal stability of ionic liquids, but also overcome the high viscosity, recycling difficulty and the consequent toxic and corrosive risk of ionic liquids . Current research on poly(ionic liquid)s focuses on their adsorption properties toward organics with ionic group and aromatic nucleus.…”

The investigation of antistatic effects of 1-ethyl-2,3-dimethylimidazolium ethyl sulphate for acrylic-based polymer film

“…It is known that ILs have high ion density, high ionic mobility, and extremely high ionic conductivity and thus may improve the conductivity of polymers. 17, 18 Since increasing the weight fraction of EIL in polymer increases the number of charge carriers, Poly-0.5EIL has the lowest surface resistivity value. In summary it can be noted that antistatic ability of the acrylic polymer results from the formation of continuous ion-conductive phases in acrylic polymer.…”

“…23 Similar decreases were observed for permanently antistatic polyurethanes containing ILs. 17 Flexural strength of unloaded polymer was determined to be 5.25 MPa and decreased to 2.53, 1.12 and 1.20 MPa after 0.1 EIL, 0.25 EIL and 0.5 EIL loading into polymer, respectively. As can be seen from Fig.…”

Design and Performance of Polyurethane Elastomers Composed with Different Soft Segments

“…The absorption peaks at 1150, 1060, and 965 cm −1 were attributed to the in-surface bending vibration of =CH on the benzene ring. Besides, the absorption peak at 731 cm −1 was also the bending vibration of =CH on the benzene ring [29]. The tested sample contained many hydroxyl and ester groups due to the appearance of strong hydroxyl and ester groups.…”