Characterization of the UV Oxidation of Raw Natural Rubber Thin Film Using Image and FT-IR Analysis Kim, Ik-Sik; Lee, Bok-Won; Sohn, Kyung-Suk; Yoon, Joohoe; Lee, Jung-Hun;
Characterization of the UV oxidation for raw natural rubber (NR) was investigated in controlled conditions through image and FT-IR analysis. The UV oxidation was performed on a thin film of natural rubber coated on a KBr window at 254 nm and room temperature to exclude the thermal oxidation. Before or after exposure to UV light, image of the NR thin film was observed at a right or tilted angle. FT-IR absorption spectra were measured in transmission mode with the UV irradiation time. The UV oxidation of NR was examined by the changes of absorption peaks at 3425, 1717, 1084, 1477, 1377, and which were assigned to hydroxyl group (-OH), carbonyl group (-C
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