Alginic acid-g-poly(N-vinylformamide) graft copolymer: Synthesis, characerization, swelling, and flocculation property
| Autor: | Dinesh Kumar Mishra, Mithilesh Yadav, Arpit Sand, Kunj Behari |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Polymers and Plastics Potassium chemistry.chemical_element Sulfuric acid General Chemistry Grafting Polyelectrolyte Surfaces Coatings and Films chemistry.chemical_compound surgical procedures operative chemistry Thiourea Polymer chemistry Materials Chemistry medicine Swelling medicine.symptom Fourier transform infrared spectroscopy Alginic acid Nuclear chemistry |
| Zdroj: | Journal of Applied Polymer Science. 121:1400-1407 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.33540 |
| Popis: | The graft copolymer of N-vinylformamide with alginic acid was synthesized by free radical poly- merization using potassium peroxymonosulphate and thiourea as redox pair in inert atmosphere. The optimum conditions for maximum grafting have been determined by varying the concentrations of N-vinylformamide, potas- sium peroxymonosulphate, thiourea, sulfuric acid, alginic acid as well as time duration and temperature. The grafting parameters increase up to the certain concentrations of N-vinylformamide, potassium peroxymonosulhate, thiou- rea, and hydrogen ion while thereafter grafting parameters decrease. The effect of alginic acid concentration on grafting parameters has been observed to decrease continu- ously. It has also been found that grafting parameters increase up to certain time and temperature, respectively, and thereafter decrease. The swelling properties of graft co- polymer in terms of swelling ratio and percent swelling are investigated. Flocculation property of pure and grafted sample for both coking and noncoking coals is also investi- gated for the treatment of coal mine waste water. The graft copolymer has been characterized by Fourier transform infrared spectroscopy as well as thermogravimetic analysis. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 1400-1407, 2011 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text