文献类型：期刊文献

英文题名：Hydrogen bonding between urethane and urea: Band assignment for the carbonyl region of FTir spectrum

作者：Luo, N; Wang, DN; Yang, SK

机构：[1]E CHINA UNIV SCI & TECHNOL,INST MAT SCI & TECHNOL,SHANGHAI 200237,PEOPLES R CHINA

年份：1996

卷号：37

期号：14

起止页码：3045

外文期刊名：POLYMER

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1996UW43100020)】；

语种：英文

外文关键词：hydrogen bonding; poly(urethane urea); Fourier transform infra-red spectroscopy

摘要：A model urethane compound and a model urea compound as viscous liquids at room temperature were synthesized. Mixtures of the two model compounds were used as the model systems of poly(urethane urea). The C=O absorption bands of the mixtures were assigned by using several infra-red techniques such as spectrum addition, spectrum subtraction and second derivative spectroscopy. Infra-red spectra of the mixtures showed the band of the free urethane carbonyl at 1732 cm(-1), the band of disordered urea carbonyl at 1666 cm(-1) and a new band at 1698 cm(-1) in the carbonyl region. The band at 1698 cm(-1) between that from hydrogen-bonded urethane C=O (1710 cm(-1)) and the band of free urea C=O (1694 cm(-1)) was assigned to hydrogen bonding between the urethane carbonyl and the urea N-H. Copyright (C) 1996 Elsevier Science Ltd.