Y. Zhang, J.-C. Chen, D. Patil
Aug 1, 1988
Citations
0
Influential Citations
3
Citations
Journal
Journal of Macromolecular Science, Part A
Abstract
Abstract Water-soluble 2,3-dihydroxypropylcellulose (DHPC) was successfully synthesized by the reaction of 3-chloro-1,2-propanediol with alkali cellulose in dioxane, or with glycidol in acetone. DHPC from the glycidol reaction was shown to have better solubility and yield. DHPC made from cotton wool and glycidol possesses the highest intrinsic visocisty (up to 4.05 dL/g). Quantitative 13 C-NMR analysis was utilized to estimate the molar substitution and degree of substitution of the resulting DHPC. Since the ratios of molar substitution to degree of substitution were found to be 2 or less, the substituents on the cellulose probably consist of monomer, dimer, or trimer of the alkylation agents used. Above the critical concentration of DHPC, the solution viscosity was found to be increased tremendously upon treating with boric acid under basic conditions.