scholarly journals Coordination Polymerization of α,ω-Diolefin: the Regulation of Polymer Microstructure by Catalyst

2021 ◽  
Vol 79 (11) ◽  
pp. 1320
Author(s):  
Yong Li ◽  
Xiao-Yan Wang ◽  
Yong Tang
Keyword(s):  
Coordination Polymerization ◽  
Polymer Microstructure

Energy-filtered imaging of polymer microstructure

1996 ◽  
Vol 54 ◽  
pp. 162-163
Author(s):  
K. Siangchaew ◽  
J. Bentley ◽  
M. Libera
Keyword(s):  
Energy Loss ◽  
Heavy Element ◽  
Spectroscopic Imaging ◽  
Data Set ◽  
Polymer Microstructure ◽  
Entire Energy ◽  
Staining Methods ◽  
Spectrum Imaging ◽  
Resolution Data

Energy-filtered electron-spectroscopic TEM imaging provides a new way to study the microstructure of polymers without heavy-element stains. Since spectroscopic imaging exploits the signal generated directly by the electron-specimen interaction, it can produce richer and higher resolution data than possible with most staining methods. There are basically two ways to collect filtered images (fig. 1). Spectrum imaging uses a focused probe that is digitally rastered across a specimen with an entire energy-loss spectrum collected at each x-y pixel to produce a 3-D data set. Alternatively, filtering schemes such as the Zeiss Omega filter and the Gatan Imaging Filter (GIF) acquire individual 2-D images with electrons of a defined range of energy loss (δE) that typically is 5-20 eV.

Transmission Electron Holography of Polymer Microstructure

1998 ◽  
Author(s):  
Matthew R. Libera
Keyword(s):  
Electron Holography ◽  
Polymer Microstructure ◽  
Transmission Electron

Mechanism of the propagation step in the anionic polymerization of styrene

1980 ◽  
Vol 45 (4) ◽  
pp. 1047-1055 ◽  
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.

The mechanism of the anionic coordination polymerization of isoprene

1980 ◽  
Vol 45 (9) ◽  
pp. 2391-2399 ◽  
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.

Synthesis of 4-arms hydroxy-functionalized PMMA-b-PE through combining free radical polymerization with coordination polymerization

2014 ◽  
Vol 20 (2) ◽  
pp. 419-425 ◽  
Author(s):  
Yaping Sheng ◽  
Haibing Huang ◽  
Mengshan Yu ◽  
Xinli Zhang ◽  
Lu Cheng ◽  
...  
Keyword(s):  
Free Radical ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Coordination Polymerization

Optical interconnection using polymer microstructure waveguides

1991 ◽  
Vol 30 (5) ◽  
pp. 622 ◽  
Author(s):  
Ray T. Chen
Keyword(s):  
Optical Interconnection ◽  
Polymer Microstructure

Elastomeric Poly(propylene) from “Dual-side” Metallocenes: Reversible Chain Transfer and its Influence on Polymer Microstructure

2006 ◽  
Vol 207 (7) ◽  
pp. 665-683 ◽  
Author(s):  
Sabine Hild ◽  
Cecilia Cobzaru ◽  
Carsten Troll ◽  
Bernhard Rieger
Keyword(s):  
Chain Transfer ◽  
Polymer Microstructure ◽  
Reversible Chain Transfer ◽  
Poly Propylene

Synthesis of Well-Defined Glycopolymers by π-Allylnickel-Catalyzed Living Coordination Polymerization

2001 ◽  
Vol 34 (13) ◽  
pp. 4294-4295 ◽  
Author(s):  
Jia Wang ◽  
Ikuyoshi Tomita ◽  
Takeshi Endo
Keyword(s):  
Coordination Polymerization

Coordination Polymerization of Metal Azides and Powerful Nitrogen-Rich Ligand toward Primary Explosives with Excellent Energetic Performances

2017 ◽  
Vol 29 (22) ◽  
pp. 9725-9733 ◽  
Author(s):  
Jian-Gang Xu ◽  
Cai Sun ◽  
Ming-Jian Zhang ◽  
Bin-Wen Liu ◽  
Xiao-Zhen Li ◽  
...  
Keyword(s):  
Coordination Polymerization ◽  
Powerful Nitrogen
Sign in / Sign up

Export Citation Format

Share Document