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- W2092246522 abstract "Nitroxide-mediated controlled/living dispersion polymerization of styrene in supercritical carbon dioxide (scCO2) has been performed successfully to high conversion using N-tert-N-butyl-N-[1-diethylphosphono-(2,2-dimethylpropyl)] nitroxide (SG1) and a poly(dimethylsiloxane-b-methyl methacrylate) stabilizer at 110 °C. The molecular weight distributions were narrow (Mw/Mn = 1.12−1.43), and the number-average molecular weight (Mn) values agreed well with theory. A large excess of free SG1 was required to obtain satisfactory control in the dispersion polymerization, possibly due to SG1 partitioning. The critical degree of polymerization at which the polymer precipitates (Jcrit) was determined as 28 by visual observation using a novel approach. Polymerizations conducted in solution (toluene) proceeded at a similar rate (∼20% faster) to those in scCO2. The number of chains increased with conversion in both dispersion and solution, with the greater increase being observed in the dispersion system." @default.
- W2092246522 created "2016-06-24" @default.
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- W2092246522 date "2006-09-06" @default.
- W2092246522 modified "2023-10-14" @default.
- W2092246522 title "Nitroxide-Mediated Radical Dispersion Polymerization of Styrene in Supercritical Carbon Dioxide Using a Poly(dimethylsiloxane-<i>b</i>-methyl methacrylate) Stabilizer" @default.
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- W2092246522 doi "https://doi.org/10.1021/ma061154n" @default.
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