Radical Crossover in Nitroxide Mediated “Living” Free Radical Polymerizations
1
Contribution from the IBM Research Division, Almaden Research Center, Center for Polymeric Interfaces and Macromolecular Assemblies, 650 Harry Road, San Jose, California 95120-6099, and Shipley Company, 455 Forest Street, Marlborough, Massachusetts 01752-3092
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Publication type: Journal Article
Publication date: 1996-01-01
scimago Q1
wos Q1
SJR: 5.554
CiteScore: 22.5
Impact factor: 15.6
ISSN: 00027863, 15205126
General Chemistry
Catalysis
Biochemistry
Colloid and Surface Chemistry
Abstract
The efficiency of exchange between the mediating nitroxide moieties at the termini of growing polymer chains during “living” free radical polymerizations has been probed by a series of crossover experiments using functionalized unimolecular initiators. The design of appropriately substituted initiators permitted the synthesis of specifically functionalized model polymers which could be readily distinguished using high-performance liquid chromatography (HPLC). Using these models, the mixture of macromolecules obtained from a 1:1 combination of disparate initiators was separated and identified. The results reveal that exchange of the mediating nitroxide free radicals is a facile process and at essentially all stages of the polymerization a nearly statistical mixture of crossover products is obtained. The HPLC techniques developed are also useful in evaluating the extent of chain termination in nitroxide mediated “living” free radical polymerizations.
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174
Total citations:
174
Citations from 2024:
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(1.15%)
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GOST
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Hawker C. J., Barclay G. G., Dao J. Radical Crossover in Nitroxide Mediated “Living” Free Radical Polymerizations // Journal of the American Chemical Society. 1996. Vol. 118. No. 46. pp. 11467-11471.
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Hawker C. J., Barclay G. G., Dao J. Radical Crossover in Nitroxide Mediated “Living” Free Radical Polymerizations // Journal of the American Chemical Society. 1996. Vol. 118. No. 46. pp. 11467-11471.
Cite this
RIS
Copy
TY - JOUR
DO - 10.1021/ja9624228
UR - https://doi.org/10.1021/ja9624228
TI - Radical Crossover in Nitroxide Mediated “Living” Free Radical Polymerizations
T2 - Journal of the American Chemical Society
AU - Hawker, C. J.
AU - Barclay, George G.
AU - Dao, Julian
PY - 1996
DA - 1996/01/01
PB - American Chemical Society (ACS)
SP - 11467-11471
IS - 46
VL - 118
SN - 0002-7863
SN - 1520-5126
ER -
Cite this
BibTex (up to 50 authors)
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@article{1996_Hawker,
author = {C. J. Hawker and George G. Barclay and Julian Dao},
title = {Radical Crossover in Nitroxide Mediated “Living” Free Radical Polymerizations},
journal = {Journal of the American Chemical Society},
year = {1996},
volume = {118},
publisher = {American Chemical Society (ACS)},
month = {jan},
url = {https://doi.org/10.1021/ja9624228},
number = {46},
pages = {11467--11471},
doi = {10.1021/ja9624228}
}
Cite this
MLA
Copy
Hawker, C. J., et al. “Radical Crossover in Nitroxide Mediated “Living” Free Radical Polymerizations.” Journal of the American Chemical Society, vol. 118, no. 46, Jan. 1996, pp. 11467-11471. https://doi.org/10.1021/ja9624228.