Novel monolithic ionogel electrolyte membrane based on uncrystallizable poly (epichlorohydrin) is prepared, with high thermal stability and high lithium storage.
Interpenetrating polymer networks (IPNs) based on fluoroelastomer/ butadiene-acrylonitrile rubber (FKM/NBR) by molten blending at a high temperature and chemical cross-linking of two components were prepared. The influence of the two networks component on the mechanical properties and thermostabilities was studied. The experimental results show that the mechanical properties of the IPNs are superior to those of the individual FKM and NBR networks due to forming the case of interpenetrating and intercross-linking between the two networks, the mechanical properties and thermal resistance exhibit higher values when 80/20 (w/w) FKM and NBR is blended and respectively cured simultaneously. The co-continuous morphology of the IPNs in the blends of 80/20 (w/w) FKM/NBR is found by transmission electron microscopy (TEM), the differential scanning calorimetry (DSC) determination shows that the blends of 80/20 (w/w) FKM/NBR have better compatibility, and the glass transition temperature of the elastomer is -21.5 ℃.
Hyperbranched polymer was synthesized from pentaerythritol (as the central core), 1,2,4-trimellitic anhydride, and epichlorohydrin, and then hyperbranched polymer electrolytes with terminal ionic groups were prepared by the reaction of hyperbranched polymer with Nmethyl imidazole. The chemical structure, thermal behavior, and ionic conductive property of the hyperbranched polymer electrolytes were investigated by 1 H-NMR, FTIR, differential scanning calorimetry, thermogravimetric analyzer, and complex impedance analysis, respectively. The ionic conductivity of hyperbranched polymer electrolyte was up to 2.4 Â 10 À4 S cm À1 at 30
Poly (terphenylene-methyl piperidine-biphenyl) was synthesized using biphenyl, terphenyl, and N-methyl-4-piperidone as raw materials to prepare anion exchange membranes (AEMs). Biphenyl and terphenyl as the copolymer monomers were used to regulate the morphology and properties of the AEMs. The flexible copolymer backbone promoted efficient transport of hydroxyl ions. The obtained AEMs show a high ion conductivity of 49.16 mS/cm at 80 C. Furthermore, the stable piperidine cation and polyarylene chain contributed to the excellent alkaline stability of AEMs that showed only 0.63% deterioration in ion conductivity after soaking in 1 M KOH at 80 C for 720 h. The peak of single cell power density of 54 mW cm À2 was obtained at a load current density of 150.1 mA cm À2 using an aqueous solution containing 1 M methanol and 1 M potassium hydroxide as the anode fuel, and pure oxygen gases as the cathode fuel at 30 C.
A cellulosic ion exchange fiber (CIEF) was prepared by using room-temperature ionic liquid 1-(3-chloro-2-hydroxypropyl)-3-methylimidazolium chloride as reaction reagent and medium. The results showed the degree of substitution of the CIEF was up to 0.78. The product was characterized by Fourier transform infrared spectrometry, thermogravimetric analysis, scanning electronic microscope. The thermal stability of the CIEF was over 200C. The adsorption experiments of CIEF for Cr(VI) were performed. The adsorption capacity of CIEF for Cr(VI) was found to be 196.1 mg g À1 at 30
Grafting of norbornene diacid anhydride (NA) onto fluoroelastomer (FPM) has been studied using a Brabender Plasticorder in the presence of dicumyl peroxide (DCP). The concentrations of NA and DCP were varied from 0 to 10.0 wt% and from 0.1 to 1.0 wt% respectively. The grafting quantities and crosslinking degree (gel content) of the grafting FPM (FPM-g-NA) were determined by acetone extraction and a back-titration procedure. The results showed that maximum NA grafting can be reached 5.5 wt% by using a relatively low peroxide concentration (0.4 wt%) and NA content (10 wt%). The characteristic groups of norbornene diacid anhydride in the grafted products were measured by Fourier transform infrared spectroscopy (FTIR), and thermal property of the FPM-g-NA was studied. The results showed that norbornene diacid anhydride had grafted onto fluoroelastomer.
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