کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1400568 | 984612 | 2012 | 7 صفحه PDF | دانلود رایگان |
Well-defined poly(4-vinylpyridine) (P4VP) was synthesised by nitroxide-mediated radical polymerization using the BlocBuilder MAMA-SG1. The controlled character of the polymerization was confirmed by kinetic measurements and linear increase of the molar mass with monomer conversion. Poly(4-vinylpyridine) terminated with SG1 was then used as macroinitiator and chain extended to form poly(4-vinylpyridine-b-methyl methacrylate) and poly(4-vinylpyridine-b-(methyl methacrylate-co-styrene)) block copolymers. These block copolymers spontaneously organized into spherical inverse micelles in THF with critical micelle concentrations of 0.1 mg/mL for poly(4VP190-b-MMA91) and 0.01 mg/mL for poly(4VP190-b-(MMA57-co-S18)) and sizes of 70 and 130 nm (DLS), respectively. The inverse micelles were loaded with copper(II)acetate leading to a slight increase in micelle size. The uniform structure of the inverse micelles was confirmed by FeSEM images, while the presence of copper in the micelle core was established by energy-dispersive X-ray spectroscopy (EDX) and FTIR spectroscopy.
Figure optionsDownload as PowerPoint slideHighlights
► Synthesis of poly(4-vinyl pyridine) using MAMA-SG1 with good control was achieved.
► Chain extension with MMA was possible with reasonable reaction control.
► Addition of styrene improved the control in macroinitiation.
► Inverse micelles from block copolymers could be loaded with copper.
Journal: European Polymer Journal - Volume 48, Issue 5, May 2012, Pages 990–996