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Multi-block polyurethanes via RAFT end-group switching and their characterization by advanced hyphenated techniques

Christina Schmid, Jana Falkenhagen, Timo F Beskers, Le-Thu T Nguyen, Manfred Wilhelm, Filip Du Prez UGent and Christopher Barner-Kowollik (2012) MACROMOLECULES. 45(16). p.6353-6362
abstract
The detailed characterization of poly(styrene)-b-poly(tetrahydrofuran) (pS-b-pTHF) multiblock copolymers (17800 g mol(-1) <= M-n <= 46800 g mol(-1)) generated via urethane linkages is presented. The synthesis of the block copolymers is enabled via a mechanistic switch of the thiocarbonyl thio end group of a poly(styrene) to dihydroxyl terminated polymers that subsequently react with a diisocyanate terminated polytetrahydrofuran based prepolymer to form multiblock copolymer structures. The characterization of the multiblock copolymers and their substructures includes size exclusion chromatography (SEC), liquid chromatography at critical conditions (LCCC), nuclear magnetic resonance (NMR), and infrared (IR) spectroscopy as well as matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. To obtain even further details of the polymer size and its composition, SEC with triple detection as well as newly developed SEC coupled online to IR spectroscopy was carried out. The quantification of the average block fractions via online SEC-IR (41-61 mol % pTHF) is in very good agreement with the results obtained via NMR spectroscopy (39-66 mol % pTHF).
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
SIZE-EXCLUSION CHROMATOGRAPHY, RADICAL POLYMERIZATION, BLOCK-COPOLYMERS, LINEAR POLYURETHANES, MOLECULAR-WEIGHT, CLICK CHEMISTRY, POLYMERS, FUNCTIONALIZATION, ARCHITECTURES, SPECTROSCOPY
journal title
MACROMOLECULES
Macromolecules
volume
45
issue
16
pages
6353 - 6362
Web of Science type
Article
Web of Science id
000307988500005
JCR category
POLYMER SCIENCE
JCR impact factor
5.521 (2012)
JCR rank
3/82 (2012)
JCR quartile
1 (2012)
ISSN
0024-9297
DOI
10.1021/ma301117k
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
3064949
handle
http://hdl.handle.net/1854/LU-3064949
date created
2012-12-04 15:57:54
date last changed
2013-09-01 00:30:40
@article{3064949,
  abstract     = {The detailed characterization of poly(styrene)-b-poly(tetrahydrofuran) (pS-b-pTHF) multiblock copolymers (17800 g mol(-1) {\textlangle}= M-n {\textlangle}= 46800 g mol(-1)) generated via urethane linkages is presented. The synthesis of the block copolymers is enabled via a mechanistic switch of the thiocarbonyl thio end group of a poly(styrene) to dihydroxyl terminated polymers that subsequently react with a diisocyanate terminated polytetrahydrofuran based prepolymer to form multiblock copolymer structures. The characterization of the multiblock copolymers and their substructures includes size exclusion chromatography (SEC), liquid chromatography at critical conditions (LCCC), nuclear magnetic resonance (NMR), and infrared (IR) spectroscopy as well as matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. To obtain even further details of the polymer size and its composition, SEC with triple detection as well as newly developed SEC coupled online to IR spectroscopy was carried out. The quantification of the average block fractions via online SEC-IR (41-61 mol \% pTHF) is in very good agreement with the results obtained via NMR spectroscopy (39-66 mol \% pTHF).},
  author       = {Schmid, Christina and Falkenhagen, Jana and Beskers, Timo F and Nguyen, Le-Thu T and Wilhelm, Manfred and Du Prez, Filip and Barner-Kowollik, Christopher},
  issn         = {0024-9297},
  journal      = {MACROMOLECULES},
  keyword      = {SIZE-EXCLUSION CHROMATOGRAPHY,RADICAL POLYMERIZATION,BLOCK-COPOLYMERS,LINEAR POLYURETHANES,MOLECULAR-WEIGHT,CLICK CHEMISTRY,POLYMERS,FUNCTIONALIZATION,ARCHITECTURES,SPECTROSCOPY},
  language     = {eng},
  number       = {16},
  pages        = {6353--6362},
  title        = {Multi-block polyurethanes via RAFT end-group switching and their characterization by advanced hyphenated techniques},
  url          = {http://dx.doi.org/10.1021/ma301117k},
  volume       = {45},
  year         = {2012},
}

Chicago
Schmid, Christina, Jana Falkenhagen, Timo F Beskers, Le-Thu T Nguyen, Manfred Wilhelm, Filip Du Prez, and Christopher Barner-Kowollik. 2012. “Multi-block Polyurethanes via RAFT End-group Switching and Their Characterization by Advanced Hyphenated Techniques.” Macromolecules 45 (16): 6353–6362.
APA
Schmid, C., Falkenhagen, J., Beskers, T. F., Nguyen, L.-T. T., Wilhelm, M., Du Prez, F., & Barner-Kowollik, C. (2012). Multi-block polyurethanes via RAFT end-group switching and their characterization by advanced hyphenated techniques. MACROMOLECULES, 45(16), 6353–6362.
Vancouver
1.
Schmid C, Falkenhagen J, Beskers TF, Nguyen L-TT, Wilhelm M, Du Prez F, et al. Multi-block polyurethanes via RAFT end-group switching and their characterization by advanced hyphenated techniques. MACROMOLECULES. 2012;45(16):6353–62.
MLA
Schmid, Christina, Jana Falkenhagen, Timo F Beskers, et al. “Multi-block Polyurethanes via RAFT End-group Switching and Their Characterization by Advanced Hyphenated Techniques.” MACROMOLECULES 45.16 (2012): 6353–6362. Print.