“…The peaks for aromatic CÀ H stretching were observed at a wavenumber of 3025.19 cm À 1 , 3025.40 cm À 1 , 3025.08 cm À 1 , and 3025.32 cm À 1 for thermal, Lp-type, Vp-type and Mp-type, respectively. [55] The methylene CÀ H asymmetric stretching vibrations were noticed at wavenumber of 2924.86 cm À 1 , 2925.06 cm À 1 , 2925.04 cm À 1 , 2925.83 cm À 1 for thermal, Lp-type, Vp-type and Mp-type, respectively. The vibrations for C=CÀ C aromatic ring stretching were detected at a wavenumber of 1600.45 cm À 1 , 1599.47 cm À 1 , 1600.23 cm À 1 and 1598.25 cm À 1 for thermal, Lp-type, Vp-type and Mp-type, respectively.…”