Polymerization of N-Vinylcaprolactam and Characterization of Poly(N-Vinylcaprolactam)

Date

2011-01-01

Author

Kozanoglu, Selin
Ozdemir, Tonguc
Usanmaz, Ali

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Poly(N-vinylcaprolactam), PNVCL, is a nonionic, nontoxic, water soluble, thermally sensitive and biocompatible polymer. It contains hydrophilic carboxylic and amide groups with hydrophobic carbon-carbon backbone suitable for biomedical applications. In this study, N-vinylcaprolactam was polymerized by free radical polymerization at 50, 60 and 70 degrees C. The synthesized polymers were white powder, soluble in water and common organic solvents. The percent conversion vs. time plot is almost linear up to about 60% conversion without induction period. The activation energy of polymerization was calculated as 108.4 kJ/mol from the Arrhenius plot. FTIR and NMR results showed that polymerization takes place by opening of carbon-carbon double bond without any change in the caprolactam ring. Polymer was characterized by FTIR, 1H-NMR and 13C -NMR, DSC, TGA and XRD techniques. The DSC thermogram of monomer has shown a melting point at 37.3 degrees C. The polymer has Tg value at 1.8 degrees C and softening temperature at 68.8 degrees C. It was determined from the X-Ray powder pattern that the polymerization proceed in the b-crystallographic axis direction.

Subject Keywords

N-vinylcaprolactam, Radical polymerization, Poly(N-vinylcaprolactam), XRD, N-vinylcaprolactam; poly(N-vinylcaprolactam); radical polymerization; XRD

URI

https://hdl.handle.net/11511/57217

Journal

JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY

DOI

https://doi.org/10.1080/10601325.2011.573350

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

S. Kozanoglu, T. Ozdemir, and A. Usanmaz, “Polymerization of N-Vinylcaprolactam and Characterization of Poly(N-Vinylcaprolactam),” JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY, pp. 467–477, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57217.