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Water-soluble copolymers. 47. Copolymerization of maleic anhydride and N-vinylformamide

Yihua Chang, Charles L. McCormick

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Abstract

The free-radical copolymerization of maleic anhydride (MA) and N-vinylformamide (NVF) in homogeneous solution has been studied in the range from 10 to 90 mol % NVF in the feed. The copolymer compositions have been determined from elemental analysis and C-13 NMR. Reactivity ratios were calculated by Fineman-Ross, Kelen-Tudos, and nonlinear least-squares methods and indicate that the monomer pair has a strong tendency to alternate. MA and NVF were found to form a charge-transfer complex in both chloroform and THF. The equilibrium constant and composition of the charge-transfer complex were calculated from the modified Benesi-Hildebrand equation.

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What this paper is about

The free-radical copolymerization of maleic anhydride (MA) and N-vinylformamide (NVF) in homogeneous solution has been studied in the range from 10 to 90 mol % NVF in the feed. The copolymer compositions have been determined from elemental analysis and C-13 NMR. Reactivity ratios were calculated by Fineman-Ross, Kelen-Tudos, and nonlinear least-squares methods and indicate that the monomer pair has a strong tendency to alternate. MA and NVF were found to form a charge-transfer complex in both chloroform and THF. The equilibrium constant and composition of the charge-transfer complex were calculated from the modified Benesi-Hildebrand equation.

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Available abstract

The free-radical copolymerization of maleic anhydride (MA) and N-vinylformamide (NVF) in homogeneous solution has been studied in the range from 10 to 90 mol % NVF in the feed. The copolymer compositions have been determined from elemental analysis and C-13 NMR. Reactivity ratios were calculated by Fineman-Ross, Kelen-Tudos, and nonlinear least-squares methods and indicate that the monomer pair has a strong tendency to alternate. MA and NVF were found to form a charge-transfer complex in both chloroform and THF. The equilibrium constant and composition of the charge-transfer complex were calculated from the modified Benesi-Hildebrand equation.

Key concepts: Copolymer, Maleic anhydride, Polymer chemistry, Chemistry, Organic chemistry, Polymer

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