Molecular Weights of Cellulosesdoi:10.1021/ie50346a023The comparison of the intrinsic viscosities and molecular weights of celluloses and cellulose derivatives, determined with the Svedberg ultracentrifuge, demonstrates that a simple relation exists between the two when suitable solvents are used. The ...
DURING recent years a good deal of attention has been given to the investigation of the molecular weight of `native' cellulose, but the results are highly discordant, the values most frequently quoted being those of Mark(about 30,000, on the basis of micell length by X-ray analysis and ...
MUCH work has been done on the determination of the molecular weight of cotton and wood celluloses. Staudinger and Feuerstein 1 reported 1,920 as the degree of polymerization of jute cellulose (which corresponds to a molecular weight of 311,040). But Chowdhury and Bardhan 2 obtained 516; ...
THE molecular weight of cellulose is of great interest to cellulose chemistry, and many attempts have been made to determine it. The cellulose derivatives, esters and ethers, can in general be dissolved in simple organic solvents, and their molecular weights determined by the osmotic pressure method...
acome on blues show some appriciation 来在蓝色显示某一appriciation[translate] ain the aqueous NaOH, irrespective of their crystal forms or crystallinity indices (Table[translate] amolecular weight of the cellulose samples is the dominant factor governing solubility in[translate]...
For comparison, the molecular weight of cellulose acetate was determined by Zimm plot method at the same wave-lengths and at the same temperature. It is concluded, that the values obtained by the two methods are in good agreement with each other. The determination of particle size of cellulose...
Molecular weight fractionation of high polydispersity native celluloses Similarly, native cellulose can also be fractionated from chloride imidazolium-based ionic liquids with acetonitrile non-solvent to give low molecular weight ... K Kathirgamanathan,W Grigsby,N Edmonds,... - 《Cellulose》 被引量:...
Finally, in the late development period, the polydispersity of the sample decreases, and the fibers grown 50 days and more contain mainly homogeneous cellulose of high molecular weight. The distribution curve of the youngest fiber has only one maximum. As the fiber development proceeds, the number...
PURPOSE: To enable a cellulose derivative to be etherified at a high concentration of reaction sites and a high efficiency of the reaction of an etherifying agent by heating a specific cellulose derivative in an organic solvent in the presence of a water-soluble oxidizing agent and water. ;CO...
The surface structure of cellulose gives the freedom to functionalize the surface with specific functionalities. Styrene-modified cellulose (MC) is used for the first time as an environment-friendly swelling inhibitor. The inhibition profile of the WBM was assessed by applying the % dispersion ...