The Interaction between La and Polyurethane System
LIU Zhi1, LIU Xin-hai2, CAO Chi-cheng3，SUN Xian-yu1, WENG Shi-fu1, XU Duan-fu2, WU Jin-guang1*
1. The State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China 2. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 3. College of Arts and Sciences, Beijing Union University, Beijing 100038, China
Abstract：A series of polyether polyurethane (PU)-LaCl3 composites with different lanthanum contents were prepared. DSC results indicate that LaCl3 promotes phase transition behavior of the LaCl3/PU composites, which causes the endothermic peak at 11.58℃ to disappear. FTIR spectroscopy demonstrates that significant variation can be observed. The peak at 1 633 cm-1 attributed to carbonyl vibration and the peak at 3 311 cm-1 attributed to N—H stretching band moves to 1 647 cm-1 and 3 355 cm-1，respectively, when LaCl3 is introduced into the PU system. A new band (-200 cm-1) assigned to the La—O band was observed, and the far IR result provided a direct evidence of the coordination between La3+ ion and CO group of PU system.
刘 智1，刘新海2，曹赤诚3，孙贤育1，翁诗甫1，徐端夫2，吴瑾光1* . 氯化镧与聚氨酯相互作用的FTIR研究[J]. 光谱学与光谱分析, 2004, 24(05): 536-538.
LIU Zhi1, LIU Xin-hai2, CAO Chi-cheng3，SUN Xian-yu1, WENG Shi-fu1, XU Duan-fu2, WU Jin-guang1* . The Interaction between La and Polyurethane System . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(05): 536-538.
