Analysis of the Character of Film Decomposition of Methyl Methacrylate (MMA) Coated Urea by Infrared Spectrum
LI Dong-po1, 2, WU Zhi-jie1*, LIANG Cheng-hua2, CHEN Li-jun1, ZHANG Yu-lan1, NIE Yan-xia1, 3
1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China 2. College of Land and Environmental Science, Shenyang Agricultural University, Shenyang 110161, China 3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The degradability characteristics of film with 4 kinds of methyl methacrylate coated urea amended with inhibitors were analyzed by FITR, which was purposed to supply theoretical basis for applying the FITR analysis method to film decomposition and methyl methacrylate coated urea fertilizers on farming. The result showed that the chemical component, molecule structure and material form of the membrane were not changed because of adding different inhibitors to urea. the main peaks of expressing film degradation process were brought by the —C—H of CH3 & CH2, —OH, C—O, C—C, C—O—C, CO, CC flexing vibrancy in asymmetry and symmetry in 3 479~3 195, 2 993~2 873, 1 741~1 564, 1 461~925 and 850~650 cm-1. The peak value changed from smooth to tip, and from width to narrow caused by chemical structural transform of film. The infrared spectrum of 4 kinds of fertilizers was not different remarkably before 60 days, and the film was slowly degraded. But degradation of the film was expedited after 60 days, it was most quickened at 120 day, and the decomposition rate of film was decreased at 310 day. The substantiality change of film in main molecule structure of 4 kinds of fertilizers didn’t happen in 310 days. The main component of film materials was degraded most slowly in brown soil. The speed of film degradation wasn’t heavily impacted by different inhibitors. The characteristic of film degradation may be monitored entirely by infrared spectrum. The degradation dynamic, chemical structure change, degradation speed difference of the film could be represented through infrared spectrum.
李东坡1, 2,武志杰1*,梁成华2,陈利军1,张玉兰1,聂彦霞1, 3 . 红外光谱分析丙烯酸树脂包膜尿素膜降解特征[J]. 光谱学与光谱分析, 2012, 32(03): 635-641.
LI Dong-po1, 2, WU Zhi-jie1*, LIANG Cheng-hua2, CHEN Li-jun1, ZHANG Yu-lan1, NIE Yan-xia1, 3 . Analysis of the Character of Film Decomposition of Methyl Methacrylate (MMA) Coated Urea by Infrared Spectrum . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(03): 635-641.
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