Versatile and controlled synthesis of star and branched macromolecules by dentritic initiation

Trollsas, Michaël; Hedrick, James L.; Mecerreyes, David; Dubois, Philippe; Jérôme, Robert; Ihre, H.; Hult, A.

doi:10.1021/ma970798f

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Article (Scientific journals)

Versatile and controlled synthesis of star and branched macromolecules by dentritic initiation

Trollsas, Michaël; Hedrick, James L.; Mecerreyes, David et al.

1997 • In Macromolecules, 30 (26), p. 8508-8511

Peer Reviewed verified by ORBi

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https://hdl.handle.net/2268/4127

DOI
10.1021/ma970798f

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Keywords :

ring-opening polymerization (ROP); lactone; star-shaped polymer

Research center :

Center for Education and Research on Macromolecules (CERM)

Disciplines :

Chemistry
Materials science & engineering

Author, co-author :

Trollsas, Michaël; Almaden Research Center, IBM Research Division, San Jose, California > NSF Center for Polymeric Interfaces and Macromolecular (CPIMA)

Hedrick, James L.; Almaden Research Center, IBM Research Division, San Jose, California > NSF Center for Polymeric Interfaces and Macromolecular (CPIMA)

Mecerreyes, David; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Dubois, Philippe ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Jérôme, Robert ; Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)

Ihre, H.; Royal Institute of technology, Stockholm, Sweden > Department of Polymer Technology

Hult, A.; Royal Institute of technology, Stockholm, Sweden > Department of Polymer Technology

Language :

English

Title :

Versatile and controlled synthesis of star and branched macromolecules by dentritic initiation

Publication date :

29 December 1997

Journal title :

Macromolecules

ISSN :

0024-9297

eISSN :

1520-5835

Publisher :

Amer Chemical Soc, Washington, United States - Washington

Volume :

Issue :

Pages :

8508-8511

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

http://pubs.acs.org/doi/pdf/10.1021/ma970798f

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
NSF-funded Center on Polymer Interfaces and Macromolecular Assemblies (CPIMA) under Award No. DMR-9400354
Swedish Institute
Axel Wenner-Gren Foundation

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Bibliography

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1H-NMR (CDCl3): (1) δ 1.00 (s, 3H, CH3), 2.97 (s, 2H, -OH), 3.62-3.87 (m, 4H, -CH2OH), 5.12 (s, 2H, ArCH2-), 7.24 (s, 5H, Ar); (2) δ 0.95 (s, 6H, -CH3), 1.29 (s, 3H, -CH3), 3.20 (s, 4H, -OH), 3.59-3.78 (m, 8H, -CH2OCO-), 5.16 (s, 2H, ArCH2-), 7.33 (s, 5H, Ar-); (3) δ 1.24 (s, 9H, -CH3), 2.15 (s, 3H, -CH3), 3.78 (s, 12H, -CH2OH), 6.98-7.10 (m, 12H, -Ar)-).
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1H-NMR spectra were recorded in solution with a Bruker AM 250 (250 MHz) spectrometer, with the TMS proton signal as an internal standard. The number average molecular weight of the polymers were calculated from the ratio of the OCH2 methylene proton signals (δ = 4.05) and the HOCH2 methylene proton signals (δ = 3.65) in the 1H-NMR spectra. 13C-NMR spectra were recorded at 62.9 MHz on a Bruker AM 250 spectrometer with the solvent carbon signal as an internal standard. Analytical TLC was performed on commercial Merck plates coated with silica gel GF254 (0.25 mm thick). The silica gel for flash chromatography was Merck Kieselgel 60 (230-400 mesh). Size exclusion chromatography was carried out on a Waters chromatograph connected to a Waters 410 differential refractometer. Four 5 μm Waters columns (300 × 7.7 mm) connected in series in order of increasing pore size (100, 1000, 105, and 106 A) were used with THF as solvent.
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