Research Article
Ring-Opening Polymerization of Lactones Catalyzed by Silicon-Based Lewis Acid
Table 2
Polymerization of cyclic monomers by 1a.
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Conditions: bulk polymerization, [M]0 : [cat.] = 100 : 1, temp. = 100°C. aEstimated by GPC analysis calibrated with standard polystyrenes in THF. bSolution polymerization in toluene at [M]0 = 0.62 mol/L. cSolution polymerization in toluene at [M]0 = 0.82 mol/L. dSolution polymerization in toluene at [M]0 = 0.41 mol/L. eTemp. = 120°C. fTemp. = 20°C. |