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- W2477536504 abstract "A continuous reactor has several advantages compared with the more conventional batch reactor. The more obvious of these are the absence of handling and contact with potentially toxic materials and the uniformity of product made. The emulsion polymerization process is attractive because of the benefits accruing from improved temperature control due to good heat transfer. However, no successful process has been reported to date, with reactor plugging being a primary problem, Ghosh and Forsyth (1) operated a tubular reactor for the emulsion polymerization of styrene in a laminar flow regime (NRe = 120). They were able to avoid reactor blockage only at extremely high soap concentrations. Rollin et al (2) found that the rate of polymerization of styrene in a tubular reactor was a maximum at the transition from laminar to turbulent flow ((NRe)e = 2100),((NRe)e being the Reynolds number based on the emulsion rather than latex properties). The work reported here used a tubular reactor of approx. 2.5 cm id and 150 meters in length. The reactor, lined with a fluorinated polymer, was coiled in a helical shape. The recipe employed standard concentrations of initiator and emulsifier. It was found that the maximum rate of polymerization occurred at (NRe)e 5000. This shift in (NRe)e corresponds to the shift of the laminar turbulent transition in a helically coiled tube as reported by White (3). Further, no plugging of this reactor, under any conditions of operation, was noticed. The reaction mechanism appears to be very close to the Smith-Ewart model, although c onversions were not always as complete as expected." @default.
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- W2477536504 date "1979-07-31" @default.
- W2477536504 modified "2023-10-17" @default.
- W2477536504 title "Continuous-Emulsion Polymerization of Styrene in a Tubular Reactor" @default.
- W2477536504 doi "https://doi.org/10.1021/bk-1979-0104.ch005" @default.
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