Thermal behavior of poly(vinylbenzyl chloride)‐grafted poly(ethylene‐co‐tetrafluoroethylene) films

Abstract

The effect of the degree of grafting (DOG) on the thermal behavior of poly(vinylbenzyl chloride)‐grafted poly(ethylene‐co‐tetrafluoroethylene) (ETFE‐g‐PVBC) films was investigated by differential scanning calorimetry (DSC), X‐ray diffraction (XRD), dynamic mechanical analysis (DMA), FT‐IR, and thermogravimetric analysis (TGA) instruments. Several ETFE‐g‐PVBC films with various degrees of grafting, including 10, 24, 41, 60, and 94%, were prepared using a radiation grafting technique. The DSC and XRD results of the ETFE‐g‐PVBC films revealed that the crystallinity of the films decreased as the DOG increased. The DMA and FT‐IR results of the films indicated that a crosslinking reaction occurred at temperatures above 250 °C. In the thermal properties of the grafted films, an increase in the DOG led to an increase in the decomposition temperature. The activation energy (Ea) of the thermal decomposition was calculated using Kissinger's equation from TGA results. The Ea value of the PVBC graft chain was found to increase as the DOG increased, indicating that the crosslinking reaction of ETFE‐g‐PVBC films increased with an increase in the DOG during the thermal degradation process. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2014, 52, 517–525

Novel concept of polymer electrolyte membranes for high-temperature fuel cells based on ETFE grafted with neutral acrylic monomers

“…At 510 °C ETFE is completely degraded. The ETFE behavior is in line with TGA results of the original ETFE backbone membrane, which degrades between 400 and 500 °C [67,68].…”

Polymer Electrolyte Membranes Prepared by Graft Copolymerization of 2-Acrylamido-2-Methylpropane Sulfonic Acid and Acrylic Acid on PVDF and ETFE Activated by Electron Beam Treatment

“…Aiming for better water retention other approaches have also been explored [12]. LT-PEM are mostly based on a stable fluorinated or polyaromatic backbone polymer, e.g., poly(ethylene-alt-tetrafluoroethylene) (ETFE) [13,14,15,16], poly (vinylidene fluoride) (PVDF) [17,18,19] or poly(ether ether ketone) (PEEK) [20,21,22,23]. Protogenic functional groups such as sulfonic acid groups are attached to these matrices [24,25,26,27,28,29].…”

Fabrication of cellulose acetate‐based radiation grafted anion exchange membranes for fuel cell application

“…The peaks from 1460 to 1490 cm −1 (■) indicate CC stretching vibrations, and the peaks from 810 to 900 cm −1 ( ◊ ) signify CH vibrations in the added benzyl groups 35 . The peak at 708 cm −1 ( + ) represents the CCl stretching vibrations 35,36 . Figure 3(b) spectra also shows that the addition of polar VBC groups to the main CA chains increased the area of the band at 3100 to 3600 cm −1 , due to the presence of water molecules attracted by the addition of said polar groups.…”

“…35 The peak at 708 cm −1 (+) represents the C Cl stretching vibrations. 35,36 Figure 3(b) spectra also shows that the addition of polar VBC groups to the main CA chains increased the area of the band at 3100 to 3600 cm −1 , due to the presence of water molecules attracted by the addition of said polar groups. This is consistent with the 1640 cm −1 band (*) attributed to the hydrogen bonding of adsorbed water.…”