Guo X, Wang Z, Zhang G, Zhao G, Zhao W
Institute of Chemistry, Henan Academy of Sciences, 450002 Zhengzhou.
Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Apr;21(2):169-72.
Hydrogen bonding in hard segment domains of segmented polyester polyurethaneurea (PUU) based on 4,4'-diphenylmethane diisocyanate (MDI), ethylene diamine (ED) and polybutylene adipate (PBA) (M.W.1,975 and M.W.1,228) was studied by means of IR spectroscopy. It was found that the double peak absorption of urea C=O groups occurred in the studied PUU with the increase of hard segment content. Two hydrogen bonding models of urea C=O groups in different hard segment sequence lengths of PUU were proposed. Three dimensional hydrogen bonding in hard segment domains can be formed by further bonding of the above planar hydrogen bondings.
采用红外光谱法研究了基于4,4'-二苯基甲烷二异氰酸酯（MDI）、乙二胺（ED）和聚己二酸丁二醇酯（PBA）（分子量分别为1975和1228）的嵌段聚酯型聚氨酯脲（PUU）硬段区域中的氢键作用。研究发现，随着硬段含量的增加，所研究的PUU中脲C=O基团出现双峰吸收。提出了PUU不同硬段序列长度中脲C=O基团的两种氢键模型。上述平面氢键的进一步结合可在硬段区域形成三维氢键。
