B. Lessard, E. J. Y. Ling, M. Maríc
Feb 10, 2012
Citations
0
Influential Citations
61
Citations
Journal
Macromolecules
Abstract
9-(4-Vinylbenzyl)-9H-carbazole (VBK) was used as the “controlling” comonomer for nitroxide mediated polymerization with 10 mol % SG1 free nitroxide relative to BlocBuilder initiator at 80 °C of oligo(ethylene glycol) methyl ether methacrylate (8–9 ethylene glycol (EG) units) (OEGMA8–9), 2-(2-methoxyethoxy)ethyl methacrylate (MEO2MA) and for an OEGMA8–9/MEO2MA-mixed feed. The synthesis of MEO2MA/VBK and OEGMA8–9/VBK copolymers and MEO2MA/OEGMA8–9/VBK terpolymers exhibited linear increases in number-average molecular weight (Mn) versus conversion X, up until X = 0.6, with final copolymers characterized by relatively narrow, monomodal molecular weight distributions (Mw/Mn < 1.4, in most cases). A series of MEO2MA/OEGMA8–9/VBK terpolymers were synthesized and by varying the OEGMA8–9:MEO2MA feed ratios, the terpolymers exhibited tunable lower critical solution temperatures in water (28 °C < LCSTs < 81 °C). MEO2MA/OEGMA8–9/VBK terpolymers were deemed sufficiently pseudo-“living” to reinitiate a second batch ...