交联羧甲基羟丙基纤维素结构的研究

STRUCTURAL STUDY ON CROSSLINKING CARBOXYMETHYL HYDROXYPROPYL CELLULOSE

本文对羧甲基羟丙基纤维素(CMHPC)及其与三价铬和铝离子的交联产物进行拉曼谱图分析,了解关于交联对CMHPC结构所产生的影响。结合红外谱图和动态粘弹性分析,进一步明确了CMHPC交联产物的结构特征。

The Raman spectra of carboxymethyl hydroxypropyl cellulose (CMHPC) and CMHPC crosslinked with chromium and aluminium ions have been investigated and found to be quite sensitive to the variation in characteristic frequencies and conformation. In the region from 950 cm-1 to 1700cm-1, which are due to the vibration of carboxylate and C-O, frequency and relative intensity vary with crosslinking. The change of ring stretching motion which may be the major contribution at about 900 cm-1 reflect the transition from one molecular form to other, i. e. conformation variation. That result have been supported by the analysis of infrared spectroscopy and viscoelasticity.