Abstract
The controlled synthesis of methacrylate di- and triblock ionomers was achieved by copper mediated atom transfer radical pPOLYmn. (ATRP). The synthetic strategy involves the use of tert-Bu methacrylate (tBMA) as the precursor for the methacrylic acid (MAA) block to obtain di- and triblock copPOLYmers with PMMA as the center block at various ratios of tBMA to MMA.PMMA macroinitiators with defined mol. wt. and high chain end functionality successfully initiate the copPOLYmn. of tBMA resulting in block copPOLYmers with excellent control of mol. wt. and low PDI.Normal Phase Gradient PPOLYmer Elution Chromatog. (NP-GPEC) was used to prove the existence of block copPOLYmer structure. Trifluoroacetic acid was used in the selective hydrPOLYsis of the Pt-BMA block resulting in methacrylic acid based blocks, which were soln. neutralized by ethanolic potassium hydroxide resulting in PMMA ionomers. The microphase sepn. and the formation of nanometer sized ionic domains varying from 12- 40 nm were confirmed by SAXS measurements. Salient features of the synthesis and morphol. of precursors/ionomers will be presented
| Original language | English |
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| Title of host publication | Abstracts of Papers, 225th ACS National Meeting, New Orleans, LA, United States, March 23-27, 2003 (2003) |
| Place of Publication | Washington, D. C |
| Publisher | American Chemical Society |
| Pages | POLY-044 |
| ISBN (Print) | 0-8412-3872-3 |
| Publication status | Published - 2003 |
| Event | 225th ACS National Meeting - New Orleans, United States Duration: 23 Mar 2003 → 27 Mar 2003 |
Conference
| Conference | 225th ACS National Meeting |
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| Country/Territory | United States |
| City | New Orleans |
| Period | 23/03/03 → 27/03/03 |