FTIR spectra and mechanical strength analysis of some selected rubber derivatives

Devulcanization of ground tire rubber: Physical and chemical changes after different microwave exposure times

“…According to spectra (Figure 2), the intensities of some bands were altered with the devulcanization process. Previous studies have attributed these IR bands to: (1) 1537 cm -1 : stretching vibration of a methyl-assisted conjugated double bond (" -(C=C) n -, where n > 6) from both NR [30,31] and SBR [32]; (2) deformation from NR rubber [31]; (3) 1076 cm -1 : symmetric C-S-C group stretching vibrations in the two C-S bonds [33]; (4) 1029 and 1006 cm -1 : C-S bonds [25]; (5) 962 cm -1 : -CH=CH-group vibrations of butadiene present in SBR [33,34]; and (6) 828 cm -1 : $ C-H bending from NR rubber [31]. The results reveal that the samples most exposed to microwaves had lower intensity bands, which was more evident in the GTR7 sample.…”

New transfer method of CVD-grown graphene using a flexible, transparent and conductive polyaniline-rubber thin film for organic electronic applications

“…Table 2. ATR-FTIR absorptions bands for graphene/EPDM-PAni, maleic anhydride treated EPDM and PAni synthesized without substrate and their assignments [52]. Table 3.…”

“…6 shows the spectra of graphene/EPDM-PAni, EPDM and PAni samples. In particular, the EPDM spectrum exhibits the characteristic bands of saturated C-H bounds: C-H symmetric and asymmetric stretching (2920 and 2850 cm -1 ), C-H 2 scissoring (1461 cm -1 ), CH 3 bending (1375 cm -1 ), and -(CH 2 -CH 2 ) -backbone (720 cm -1 ) [52]. PAni synthesized without substrate showed the following bands: stretching of quinoid ring (1598 cm -1 ), stretching of benzenoid ring (1496 cm -1 ), C-N stretching (aromatic amines) + C-C bending (1302 cm -1 ), C-N stretching (aliphatic amines) + C-C stretching (1245 cm -1 ) and Q=H stretching + =Q-stretching (1121 cm -1 ) where Q is a quinon group [28,53].…”

Fabrication of a super-hydrophobic surface on a magnesium alloy by a simple method

“…antisymmetric stretching vibrations of -CH 2 - [22]. It can be seen that the absorption peaks corresponding to methyl (CH 3 -) and methylene (-CH 2 -) groups appear in the spectrum of the stearic-acid modified specimen, but not in that of the unmodified specimen.…”