H n.m.r. spectroscopy is employed to characterize the mesomorphic behaviour of hydroxypropyl cellulose (HPC) in D,O. This analysis is further extended to ternary solutions containing HPC and xanthan gum (XG). A compositional range over which addition of XG to HPC enhances single-phase anisotropic ordering is reported. Convoluted spectra representative of HPC-rich and XG-rich components are observed at some blend and solution concentrations, suggesting that phase separation occurs between these two lyotropic polysaccharides.
Посилання на статтю:
Enhanced anisotropic ordering and phase separation in lyotropic polysaccharide blends / Richard J. Spontak*, Robert G. Bartolot, Magda El-Nokaly and George D. Hiler // Polymer. – 1992. – Vol 33. – P. 5343-5345.