Kinetics and mechanisms of emulsion polymerization of vinylidene chloride. I. Effects of operating variables on the rate of polymerization and the number of polymer particles produced
| Autor: | M. Nomura, T. Kodani, K. Fujita, Y. Kihara, J. Ojima |
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| Rok vydání: | 1998 |
| Předmět: |
Kinetic chain length
Polymers and Plastics Bulk polymerization Chemistry Organic Chemistry Radical polymerization technology industry and agriculture Emulsion polymerization Chain transfer Chain-growth polymerization Chemical engineering Polymerization Polymer chemistry Materials Chemistry Precipitation polymerization |
| Zdroj: | Journal of Polymer Science Part A: Polymer Chemistry. 36:1919-1928 |
| ISSN: | 1099-0518 0887-624X |
| DOI: | 10.1002/(sici)1099-0518(199808)36:11<1919::aid-pola27>3.0.co;2-g |
| Popis: | Emulsion polymerization of vinylidene chloride was carried out at 50°C using sodium lauryl sulfate as emulsifier and potassium persulfate as initiator, respectively. Contrary to the results so far reported, the stirring rate did not affect the progress of the polymerization and such an abnormal kinetic behavior as the rate of polymerization suddenly drops in the course of polymerization was not observed. The number of polymer particles produced was proportional to the 0.7 power of the concentration of emulsifier forming micelles and to the 0.3 power of the initial initiator concentration, respectively, and was independent of the initial monomer concentration. The rate of polymerization was in proportion to the 0.3 power of the concentration of emulsifier forming micelles, to the 0.5 power of the initial initiator concentration, to the 0.2 power of the initial monomer concentration, and to the 0.45 power of the number of polymer particles, respectively. |
| Databáze: | OpenAIRE |
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