Gnaneshwar, Rudhramyna ; Sivaram, Swaminathan (2007) End-functional poly(methyl methacrylate)s via group transfer polymerization Journal of Polymer Science Part A: Polymer Chemistry, 45 (12). pp. 2514-2531. ISSN 0887-624X
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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/pola.22...
Related URL: http://dx.doi.org/10.1002/pola.22013
Abstract
Hydroxyl-, amine-, and lactone-end-functional poly(methyl methacrylate)s (PMMA) were prepared with controlled molecular weights and Mw/Mn = 1.06-1.19 via group transfer polymerization. This was achieved by the electrophilic termination of silyl ketene acetal ended PMMAs with benzaldehyde, N-trimethylsilyl benzaldimine, and 5,6-dihydro-2H-pyran-2-one, respectively. The number-average degree of functionalization, as determined by NMR/SEC, was in the range of 0.70-0.85. A Lewis acid was used for terminating silyl ketene acetal ended PMMA with N-trimethylsilyl benzaldimine, whereas tetra-n-butyl ammonium bibenzoate was used in the case of benzaldehyde and 5,6-dihydro-2H-pyran-2-one. MALDI-TOF MS analysis of the end-functional polymers indicated the competing formation of cyclic end groups due to a back-biting reaction along with end-functional PMMAs.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to John Wiley and Sons. |
| Keywords: | α β-unsaturated Lactones; Back-biting; Degree of Functionality; Electrophilic Termination; End-functional Polymers; Functionalization; GTP; Hydroxyl; Amine-terminal Polymers; Living Anionic Polymerization; MALDI-TOF MS; PMMA; Silyl Ketene Acetal Ended Poly(methyl methacrylate) |
| ID Code: | 48556 |
| Deposited On: | 14 Jul 2011 14:22 |
| Last Modified: | 14 Jul 2011 14:22 |
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