Highly cis-1,4-selective coordination polymerization of polar 2-(4-methoxyphenyl)-1,3-butadiene and copolymerization with isoprene using a β-diketiminato yttrium bis(alkyl) complex

Changguang Yao; Na Liu; Shiyu Long; Chunji Wu; Dongmei Cui

doi:10.1039/c5py01801c

Highly cis-1,4-selective coordination polymerization of polar 2-(4-methoxyphenyl)-1,3-butadiene and copolymerization with isoprene using a β-diketiminato yttrium bis(alkyl) complex

Polymer Chemistry ◽

10.1039/c5py01801c ◽

2016 ◽

Vol 7 (6) ◽

pp. 1264-1270 ◽

Cited By ~ 35

Author(s):

Changguang Yao ◽

Na Liu ◽

Shiyu Long ◽

Chunji Wu ◽

Dongmei Cui

Keyword(s):

Coordination Polymerization ◽

Polar Monomer

A novel polar monomer 2-MOPB has been (co)polymerized to afford the highly cis-1,4 regulated P(2-MOPB) and P(2-MOPB-co-IP) of new plastics and rubber depending on the compositions.

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cis-1,4 Selective Coordination Polymerization of 1,3-Butadiene and Copolymerization with Polar 2-(4-Methoxyphenyl)-1,3-butadiene by Acenaphthene-Based α-Diimine Cobalt Complexes Featuring Intra-Ligand π-π Stacking Interactions

Polymers ◽

10.3390/polym13193329 ◽

2021 ◽

Vol 13 (19) ◽

pp. 3329

Author(s):

Beibei Wang ◽

Heng Liu ◽

Tao Tang ◽

Xuequan Zhang

Keyword(s):

Molecular Weight ◽

Cobalt Complexes ◽

Stacking Interactions ◽

Water Contact ◽

Coordination Polymerization ◽

Molecular Weights ◽

Angle Measurements ◽

Π Stacking ◽

High Yields ◽

Polar Monomer

Highly cis-1,4 selective (up to 98%) coordination–insertion polymerization of 1,3-butadiene (BD) has been achieved herein using acenaphthene-based α-diimine cobalt complexes. Due to the presence of intra-ligand π-π stacking interactions, the complexes revealed high thermostability, affording polybutadiene products in high yields. Moreover, all of the obtained polymers possessed a relatively narrow molecular weight distribution as well as high molecular weight (up to 92.2 × 104 Dalton). The molecular weights of the resultant polybutadienes could be finely tuned by varying polymerization parameters, including temperature, Al/Co ratio, etc. Moreover, the copolymerization of butadiene with polar monomer 2-(4-methoxyphenyl)-1,3-butadiene (2-MOPB) was also successfully realized to produce a type of polar cis-1,4 polybutadiene (cis-1,4 content: up to 98.1%) with a range of 2-MOPB content (0.46–1.83%). Water contact angle measurements indicated that the insertion of a polar monomer into a polymer chain could significantly improve the polymer’s surface property.

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Mechanism of the propagation step in the anionic polymerization of styrene

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19801047 ◽

1980 ◽

Vol 45 (4) ◽

pp. 1047-1055 ◽

Cited By ~ 2

Author(s):

Miroslav Kašpar ◽

Jiří Trekoval

Keyword(s):

Experimental Data ◽

Induction Period ◽

Anionic Polymerization ◽

Reactive Intermediate ◽

Coordination Polymerization ◽

Kinetic Dependence ◽

Mathematical Solution ◽

Slow Reaction

The paper is dealing with an investigation of the kinetic dependence of the propagation step in the anionic coordination polymerization of styrene in benzene at 303 K with "living" oligostyryllithium as initiator at the onset of the reaction. A short but distinct induction period was found, indicating a preceding slow reaction leading to the formation of a reactive intermediate, which behaves as the initiator of the reaction. Using results obtained in the first paper of this series, a new mechanism of propagation has been suggested, the mathematical solution of which is correlated with experimental data.

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The mechanism of the anionic coordination polymerization of isoprene

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19802391 ◽

1980 ◽

Vol 45 (9) ◽

pp. 2391-2399 ◽

Cited By ~ 1

Author(s):

Miroslav Kašpar ◽

Jiří Trekoval

Keyword(s):

Chromatographic Method ◽

Initial Period ◽

Reaction Scheme ◽

Polymerization Kinetics ◽

Coordination Polymerization ◽

Initial Concentration ◽

The Cross ◽

Gas Chromatographic Method ◽

Kinetics Of

The polymerization kinetics of isoprene (2-methyl-1,3-butadiene) in benzene with butyllithium as the initiator was investigated by the gas chromatographic method. After completion of the initial period of the reaction, its order with respect to the initial concentration of initiator is negative at the concentrations of the latter between 0.01 and 0.25 mol/l, and positive at higher concentrations. A reaction scheme has been suggested with respect to the "cross" association of butyllithium and of the "living" oligoisoprene.

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