Research Article
Ring-Opening Polymerization of Lactones Catalyzed by Silicon-Based Lewis Acid
Table 3
Glass-transition temperatures of the polymers.
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Conditions: bulk, [M]0 : [cat.] = 100 : 1, temp. = 100°C. aDetermined by GPC analysis calibrated with standard polystyrenes in THF. bDetermined by DSC in the second heating scan. cInit. = BnOH, [M]0 : [Init.] : [cat.] = 100 : 1 : 0.25, [M]0 = 2.0 mol/L. |