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Dissolution of alkyl vinyl ether–maleic anhydride copolymers and ester derivatives

✍ Scribed by Charles W. Woodruff; Garnet E. Peck; Gilbert S. Banker

Publisher
John Wiley and Sons
Year
1972
Tongue
English
Weight
628 KB
Volume
61
Category
Article
ISSN
0022-3549

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✦ Synopsis

The dissolution properties of several alkyl vinyl ethermaleic anhydride copolymers and their ethyl, rr-propyl, and 17- butyl half-and quarterester derivatives were studied. An immersion refractometric method was employed to determine the polymer dissolution properties. Rates of polymer dissolution and lag times prior to the initiation of measurable dissolution rates were shown to be dependent upon several variables. The polymer variables studied included polymer molecular weight, degree of esterification, ester chain length, and ether substituent. Other factors studied were pH of the dissolution medium, type of sample (cast films or compressed disks), and inclusion of a plasticizing agent. Each factor was shown to influence the resulting polymer dissolution properties. Keyphrases 0 Dissolution rates, alkyl vinyl ethers--maleic anhydride copolymers and partial esters-determination, related to ~ ~~~ Gantrez AN series, GAF Corp., New York, N. Y. CAP, DPI Division, Eastman Organic Chemical Products, Kings-Carver laboratory press model B, Fred S .

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