ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Cellulose acetate can be fractionated by allowing it to be adsorbed from acetone solution onto activated carbon. Sharpest fractions are obtained when small amounts of adsorbent are used successively to take up increments of the total polymer in solution. Each adsorbate is refractionated during elution with a good solvent, and in one adsorption-desorption cycle the polymer can be divided into a large number of fractions, suitable with certain limitations, for molecular weight distribution analysis. Smaller molecules are both preferentially adsorbed and are the first eluted. Temperature and concentration have some influence on the sharpness of fractionation, but the most critical factor is the ratio of adsorbent to polymer.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1959.1204113808
Permalink