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PubMed · 15769039

[The interaction between La and polyurethane system].

Zhi Liu·Xin-hai Liu·Chi-cheng Cao·Xian-yu Sun·Shi-fu Weng·Duan-fu Xu·Jin-guang Wu
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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 degrees C to disappear. FTIR spectroscopy demonstrates that significant variation can be observed. The peak at 1633 cm(-1) attributed to carbonyl vibration and the peak at 3311 cm(-1) attributed to N-H stretching band moves to 1647 cm(-1) and 3355 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 C=O group of PU system.

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English AbstractJournal ArticleResearch Support, Non-U.S. Gov't

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Zhi Liu, Xin-hai Liu, Chi-cheng Cao, Xian-yu Sun, Shi-fu Weng, Duan-fu Xu, Jin-guang Wu. 2004. [The interaction between La and polyurethane system].. https://pubmed.ncbi.nlm.nih.gov/15769039/

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