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Polymers 2017, 9, 626 4 of 15 Polymers 2017, 9, 626 4 of 15 2.2. UV–VIS Measurement 2.2. UV–VIS Measurement The optical absorption spectra of the solid polymer films have been collected using an ultraviolet–visible near-infrared (UV–VIS–NIR) spectrophotometer (Jasco SLM-468, Tokyo, Japan) in The optical absorption spectra of the solid polymer films have been collected using an the absorbance mode. ultraviolet–visible near-infrared (UV–VIS–NIR) spectrophotometer (Jasco SLM-468, Tokyo, Japan) in the absorbance mode. 2.3. FTIR and X-ray Diffraction Analysis 2.3. FTIR and X-ray Diffraction Analysis The complex formation between the GT extract and PMMA polymer was investigated using FourierTthreancsofmorpmlexinfforamreadtio(nFTbIeRtw) sepenecthroesGcoTpeyx.trTahcteaFnTdIRPMspMecAtrpaowlyemrercowllaesctinedveustsiignagtead Tuhsienrgmo FisFcohuerieSrciteranntisfifocrm(Wianlftrhaarmed, (MFTAIR, )UsSpAec)trNoiscolpeyt.iTS1h0e FTIR specttrraopwheoretocmoleletecrteidnutshiengwavTehneurmober −1 −1 regFiiosnch4e0r0S–c4i0e0n0ticfimc (Wwaltihthama,reMsoAlu,tUioSnAo)fN2icmolet .iST1h0eFXT-IrRayspdeicfftraocpthionto(mXeRtDer)iwnatsherewcoarvdenduamtbroerom region 400–4000 cm−1 with a resolution of 2 cm−1. The X-ray diffraction (XRD) was recorded at room temperature using an X-ray diffractometer (NL-7602 EA PANalytical B.V., Almelo, The Netherlands) temperature using an X-ray diffractometer (NL-7602 EA PANalytical B.V., Almelo, The Netherlands) with an operating voltage and current of 40 kV and 45 mA, respectively. The samples were scanned with an operating voltage and current of 40 kV and 45 mA, respectively. The samples we◦re scanned ◦ with a monochromatic X-ray beam of wavelength λ = 1.5406 Å and glancing angles of 5 ≤ 2θ ≤ 90 with a monochromat◦ic X-ray beam of wavelength λ = 1.5406 Å and glancing angles of 5° ≤ 2θ ≤ 90° with a step size of 0.05 . The required experimental techniques for sample characterization are shown with a step size of 0.05°. The required experimental techniques for sample characterization are shown in Figure 1. in Figure 1. 3. Results and Discussion 3. Results and Discussion 3.1. FTIR Study 3.1. FTIR Study Figure 2 shows the FTIR spectrum of the GT extract solution. Recent studies have exposed Figure 2 shows the FTIR spectrum of the GT extract solution. Recent studies have exposed great great interest in the use of natural dyes. This is a result of the fact that they are recognized as being interest in the use of natural dyes. This is a result of the fact that they are recognized as being environmentally friendly, along with having other properties, such as deodorizing, being lower in environmentally friendly, along with having other properties, such as deodorizing, being lower in toxicity, and showing anti-allergenic, anti-bacterial, and anti-cancer properties [15,16]. An intense toxicity, and showing anti-allergenic, anti-bacterial, and anti-cancer properties [15,16]. An intense broad band appearing at 3401 cm−1 is found to be attributed to the N–H and O–H stretching modes of broad band appearing at 3401 cm−1 is found to be attributed to the N–H and O–H stretching modes polyphenols [17,18]. A strong band at 1628 cm−1 can also be assigned to the C=C stretch in the aromatic of polyphenols [17,18]. A strong band at 1628 cm−1 can also be assigned to the C=C stretch in the ring and the C=O stretch in polyphenols [18,19]. The C–H and O–H stretches in alkanes and carboxylic aromatic ring and the C=O stretch in polyphenols [18,19]. The C–H and O–H stretches in alkanes and acid have been found to appear at 2917 and 2848 cm−1, respectively [18]. The C–O stretching in amino carboxylic acid have been found to appear at 2917 and 2848 cm−1, respectively [18]. The C–O acid has also caused a band at 1029 cm−1 [18,19]. Earlier studies have established that the FTIR bands stretching in amino acid has also caused a band at 1029 cm−1 [18,19]. Earlier studies have established of tea extracts containing polyphenols have appeared at 3388 cm−1, 1636 cm−1, and 103−91 cm−1, w−h1ich that the FTIR bands of tea extracts containing polyphenols have appeared at 3388 cm , 1636 cm , arereferredtoO−1–H/N–H,C=C,C–O–Cstretchingvibrations,respectively[18–21].Therefore,from and 1039 cm , which are referred to O–H/N–H, C=C, C–O–C stretching vibrations, respectively the IR spectrum, one can observe that carboxylic acid, polyphenols, and amino acid are the main [18–21]. Therefore, from the IR spectrum, one can observe that carboxylic acid, polyphenols, and functional groups in the green tea sample. amino acid are the main functional groups in the green tea sample. 3401 2848 2917 604 819 1029 1628 3900 3400 2900 2400 1900 1400 900 400 wavenumber (cm-1) Figure 2. Fourier transform infrared (FTIR) spectra of pure green tea (GT) extract. Figure 2. Fourier transform infrared (FTIR) spectra of pure green tea (GT) extract. Transmittance (a.u)PDF Image | Green Chemistry Fabricate Small Band Gap Polymers
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