Macromolecules
Article
(10) Leicht, H.; Gottker-Schnetmann, I.; Mecking, S. Stereoselective
Copolymerization of Butadiene and Functionalized 1,3-Dienes. ACS
Macro Lett. 2016, 5 (6), 777−780.
(11) Yao, C.; Liu, N.; Long, S.; Wu, C.; Cui, D. Highly cis-1,4-
selective coordination polymerization of polar 2-(4-methoxyphenyl)-
1,3-butadiene and copolymerization with isoprene using a [small
beta]-diketiminato yttrium bis(alkyl) complex. Polym. Chem. 2016, 7
(6), 1264−1270.
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and sulfur. A shielding of the functional groups by an excess of
aluminum alkyls is not required to observe productive
copolymerization. The obtained copolymers are stereoregular
and exhibit a high content of 1,4-cis units. Even stereoregular
homopolymerizations of the functionalized dienes are feasible.
In contrast, we observed no polymerization activity in the
presence of several oxygen functionalized dienes studied.
(12) Dong, W.; Masuda, T. Novel neodymium (III) isopropoxide-
methylaluminoxane catalyst for isoprene polymerization. J. Polym. Sci.,
Part A: Polym. Chem. 2002, 40 (11), 1838−1844.
ASSOCIATED CONTENT
* Supporting Information
The Supporting Information is available free of charge on the
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S
(13) Hu, Y.; Dong, W.; Masuda, T. Novel Methylaluminoxane-
Activated Neodymium Isopropoxide Catalysts for 1,3-Butadiene
Polymerization and 1,3-Butadiene/Isoprene Copolymerization. Macro-
mol. Chem. Phys. 2013, 214 (19), 2172−2180.
NMR spectra, GPC and DSC data, kinetic experiments,
and synthetic procedures (PDF)
(14) Maiwald, S.; Weißenborn, H.; Windisch, H.; Sommer, C.;
Muller, G.; Taube, R. Zur Katalyse der stereospezifischen
̈
Butadienpolymerisation mit den Katalysatorsystemen aus Nd(η3-
C3H5)3 · dioxan und methylaluminoxan (MAO) sowie Hexaisobu-
tylaluminoxan (HIBAO). Macromol. Chem. Phys. 1997, 198 (10),
3305−3315.
AUTHOR INFORMATION
Corresponding Author
ORCID
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(15) Kesti, M. R.; Coates, G. W.; Waymouth, R. M. Homogeneous
Ziegler-Natta polymerization of functionalized monomers catalyzed by
cationic Group IV metallocenes. J. Am. Chem. Soc. 1992, 114 (24),
9679−9680.
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(16) Goretzki, R.; Fink, G. Homogeneous and heterogeneous
metallocene/MAO-catalyzed polymerization of trialkylsilyl-protected
alcohols. Macromol. Rapid Commun. 1998, 19 (10), 511−515.
Notes
(17) Schneider, M. J.; Schafer, R.; Mulhaupt, R. Aminofunctional
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The authors declare no competing financial interest.
linear low density polyethylene via metallocene-catalysed ethene
copolymerization with N,N-bis(trimethylsilyl)-1-amino-10-undecene.
Polymer 1997, 38 (10), 2455−2459.
ACKNOWLEDGMENTS
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We enjoyed fruitful discussions with Karen Burke, Maggie
Vielhaber, and Stephan Rodewald. We thank Lars Bolk for DSC
and GPC measurements.
(18) The addition of defined amounts of MeOH to a copolymer
solution followed by stirring for a sufficient amount of times ensures
the complete deprotection of the amine groups. Precipitation in
MeOH of the copolymer can lead to only partially deprotected amine
groups.
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