Conventional Oxyanionic versus Monomer-Activated Anionic Copolymerization of Ethylene Oxide with Glycidyl Ethers: Striking Differences in Reactivity Ratios

2016 ◽  
Vol 5 (11) ◽  
pp. 1206-1211 ◽  
Author(s):  
Jana Herzberger ◽  
Daniel Leibig ◽  
Johannes C. Liermann ◽  
Holger Frey
Keyword(s):  
Ethylene Oxide ◽  
Reactivity Ratios ◽  
Glycidyl Ethers ◽  
Anionic Copolymerization

Reactivity ratios for the anionic copolymerization of ethylene oxide and butylene oxide in bulk

1993 ◽  
Vol 29 (2-3) ◽  
pp. 281-286 ◽  
Author(s):  
Stewart Dickson ◽  
Ga-Er Yu ◽  
Frank Heatley ◽  
Colin Booth
Keyword(s):  
Ethylene Oxide ◽  
Reactivity Ratios ◽  
Anionic Copolymerization

Determination of reactivity ratios for the anionic copolymerization of ethylene oxide and propylene oxide in bulk

1991 ◽  
Vol 27 (7) ◽  
pp. 573-579 ◽  
Author(s):  
Frank Heatley ◽  
Ga-er Yu ◽  
Colin Booth ◽  
Trevor G. Blease
Keyword(s):  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Reactivity Ratios ◽  
Anionic Copolymerization

scholarly journals Sustainable Myrcene-Based Elastomers via a Convenient Anionic Polymerization

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 838
Author(s):  
David Hermann Lamparelli ◽  
Magdalena Maria Kleybolte ◽  
Malte Winnacker ◽  
Carmine Capacchione
Keyword(s):  
Anionic Polymerization ◽  
Sodium Hydride ◽  
Reactivity Ratios ◽  
Molecular Weights ◽  
Styrene Copolymers ◽  
Wide Range ◽  
Elastomeric Materials ◽  
Complete Study ◽  
Anionic Copolymerization ◽  
Trialkylaluminum Derivatives

Soluble heterocomplexes consisting of sodium hydride in combination with trialkylaluminum derivatives have been used as anionic initiating systems at 100 °C in toluene for convenient homo-, co- and ter-polymerization of myrcene with styrene and isoprene. In this way it has been possible to obtain elastomeric materials in a wide range of compositions with interesting thermal profiles and different polymeric architectures by simply modulating the alimentation feed and the (monomers)/(initiator systems) ratio. Especially, a complete study of the myrcene-styrene copolymers (PMS) was carried out, highlighting their tapered microstructures with high molecular weights (up to 159.8 KDa) and a single glass transition temperature. For PMS copolymer reactivity ratios, rmyr = 0.12 ± 0.003 and rsty = 3.18 ± 0.65 and rmyr = 0.10 ± 0.004 and rsty = 3.32 ± 0.68 were determined according to the Kelen–Tudos (KT) and extended Kelen–Tudos (exKT) methods, respectively. Finally, this study showed an easy accessible approach for the production of various elastomers by anionic copolymerization of renewable terpenes, such as myrcene, with commodities.

Fast Access to Amphiphilic Multiblock Architectures by the Anionic Copolymerization of Aziridines and Ethylene Oxide

2018 ◽  
Vol 140 (41) ◽  
pp. 13407-13412 ◽  
Author(s):  
Tassilo Gleede ◽  
Elisabeth Rieger ◽  
Jan Blankenburg ◽  
Katja Klein ◽  
Frederik R. Wurm
Keyword(s):  
Ethylene Oxide ◽  
Anionic Copolymerization ◽  
Fast Access

“Dumb” pH-Independent and Biocompatible Hydrogels Formed by Copolymers of Long-Chain Alkyl Glycidyl Ethers and Ethylene Oxide

2020 ◽  
Vol 21 (8) ◽  
pp. 3152-3162
Author(s):  
Patrick Verkoyen ◽  
Philip Dreier ◽  
Matthias Bros ◽  
Christian Hils ◽  
Holger Schmalz ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Glycidyl Ethers ◽  
Long Chain

Anionic Copolymerization of Acrylonitrile with Methyl Acrylate under the Action of a Novel Initiating System Based on a Bicyclic Tertiary Amine and Ethylene Oxide

2020 ◽  
Vol 93 (7) ◽  
pp. 1009-1018
Author(s):  
A. E. Tarasov ◽  
A. A. Grishchuk ◽  
S. V. Karpov ◽  
Yu. V. Podval’naya ◽  
A. V. Chernyak ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Tertiary Amine ◽  
Methyl Acrylate ◽  
Anionic Copolymerization

Anionic Copolymerization of Acrylonitrile with Ethyl Acrylate under the Action of the Initiating System of 1,4-Diazabicyclo[2.2.2]Octane – Ethylene Oxide

2021 ◽  
Vol 899 ◽  
pp. 226-231
Author(s):  
Yulia V. Podvalnaya ◽  
Aleksandr E. Tarasov ◽  
Alexander A. Grishchuk ◽  
Dmitry A. Chernyayev ◽  
Elmira R. Badamshina
Keyword(s):  
Heat Treatment ◽  
Ethylene Oxide ◽  
Thermal Behavior ◽  
Thermal Effects ◽  
Initial Rate ◽  
Molar Fraction ◽  
Reaction Medium ◽  
Ethyl Acrylate ◽  
Branched Structure ◽  
Anionic Copolymerization

It was found, studying acrylonitrile copolymerization with ethyl acrylate in dimethyl sulfoxide under the action of anionic initiating system of 1,4-diazabicyclo [2.2.2] octane – ethylene oxide, that the obtained copolymers have a branched structure. An increase in the molar fraction of ethyl acrylate in the reaction medium leads to a decrease in the initial rate of acrylonitrile polymerization. Thermal behavior of copolymer samples was investigated; it was found that ethyl acrylate, being introduced into the polyacrylonitrile structure, both reduces thermal effects related to the reactions taking place during heat treatment of copolymers, and increases the half-width of the heat release peak.

“Clickable PEG” via anionic copolymerization of ethylene oxide and glycidyl propargyl ether

2017 ◽  
Vol 8 (12) ◽  
pp. 1882-1887 ◽  
Author(s):  
Jana Herzberger ◽  
Daniel Leibig ◽  
Jens Langhanki ◽  
Christian Moers ◽  
Till Opatz ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Ethylene Glycol ◽  
Subsequent Generation ◽  
Poly Ethylene Glycol ◽  
Propargyl Ether ◽  
One Step ◽  
Poly Ethylene ◽  
Anionic Copolymerization

First one-step synthesis of poly(ethylene glycol) bearing multiple alkyne-groups along the polyether backbone and subsequent generation of PEG-glycopolymers by CuAAC.

The poly(propylene oxide-co-ethylene oxide) gradient is controlled by the polymerization method: determination of reactivity ratios by direct comparison of different copolymerization models

2019 ◽  
Vol 10 (22) ◽  
pp. 2863-2871 ◽  
Author(s):  
Jan Blankenburg ◽  
Erik Kersten ◽  
Kamil Maciol ◽  
Manfred Wagner ◽  
Sirus Zarbakhsh ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Reactivity Ratios ◽  
H Nmr ◽  
Poly Propylene ◽  
Polymerization Method

An investigation of the copolymerization of EO and PO by in situ1H NMR spectroscopy reveals striking differences in the monomer gradient, depending on the polymerization method.

Determination of Monomer Reactivity Ratios in the Copolymerization of Ethylene Oxide and Propylene Oxide

1994 ◽  
Vol 31 (1) ◽  
pp. 9-11
Author(s):  
M. Adal ◽  
P. Flodin ◽  
E. Gottberg-Klingskog ◽  
K. Holmberg
Keyword(s):  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Reactivity Ratios ◽  
Monomer Reactivity Ratios
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