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- W2062034688 abstract "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°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°C. The polymer has Tg value at 1.8°C and softening temperature at 68.8°C. It was determined from the X-Ray powder pattern that the polymerization proceed in the b-crystallographic axis direction." @default.
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- W2062034688 date "2011-04-29" @default.
- W2062034688 modified "2023-10-02" @default.
- W2062034688 title "Polymerization of N-Vinylcaprolactam and Characterization of Poly(N-Vinylcaprolactam)" @default.
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- W2062034688 doi "https://doi.org/10.1080/10601325.2011.573350" @default.
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