Living Polymerization of Phenylacetylene with Tetrafluorobenzobarrelene Ligand-Containing Rhodium Catalyst Systems Featuring the Synthesis of High Molecular Weight Polymer

2006 ◽  
Vol 39 (25) ◽  
pp. 8567-8573 ◽  
Author(s):  
Irfan Saeed ◽  
Masashi Shiotsuki ◽  
Toshio Masuda
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Living Polymerization ◽  
Rhodium Catalyst ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Catalyst Systems

scholarly journals Iron-Based Catalytically Active Complexes in Preparation of Functional Materials

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1683
Author(s):  
Katarzyna Rydel-Ciszek ◽  
Tomasz Pacześniak ◽  
Izabela Zaborniak ◽  
Paweł Błoniarz ◽  
Karolina Surmacz ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Noble Metals ◽  
Functional Materials ◽  
Cost Effective ◽  
Polymer Materials ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Iron Based ◽  
Catalyst Systems

Iron complexes are particularly interesting as catalyst systems over the other transition metals (including noble metals) due to iron’s high natural abundance and mediation in important biological processes, therefore making them non-toxic, cost-effective, and biocompatible. Both homogeneous and heterogeneous catalysis mediated by iron as a transition metal have found applications in many industries, including oxidation, C-C bond formation, hydrocarboxylation and dehydration, hydrogenation and reduction reactions of low molecular weight molecules. These processes provided substrates for industrial-scale use, e.g., switchable materials, sustainable and scalable energy storage technologies, drugs for the treatment of cancer, and high molecular weight polymer materials with a predetermined structure through controlled radical polymerization techniques. This review provides a detailed statement of the utilization of homogeneous and heterogeneous iron-based catalysts for the synthesis of both low and high molecular weight molecules with versatile use, focusing on receiving functional materials with high potential for industrial application.

Intrinsic viscoelasticity in thin high-molecular-weight polymer films

2014 ◽  
Vol 89 (6) ◽  
Author(s):  
Xiaoyuan Sheng ◽  
Frédéric Wintzenrieth ◽  
Katherine R. Thomas ◽  
Ullrich Steiner
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Polymer Films ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer

Structural studies of the capsular polysaccharide from Haemophilus pleuropneumoniae serotype 2

1987 ◽  
Vol 65 (5) ◽  
pp. 414-422 ◽  
Author(s):  
Eleonora Altman ◽  
Jean-Robert Brisson ◽  
Malcolm B. Perry
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
High Molecular Weight ◽  
Capsular Polysaccharide ◽  
Structural Studies ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Structure Formula ◽  
Nuclear Magnetic

The capsular polysaccharide of Haemophilus pleuropneumoniae serotype 2 (ATCC 27089) is composed of D-glucose (two parts), D-galactose (one part), glycerol (one part), and phosphate (one part). Hydrolysis, dephosphorylation, methylation, enzymic studies, and 1H and 13C nuclear magnetic resonance experiments showed that the polysaccharide is a high molecular weight polymer of a tetrasaccharide repeating units, linked by monophosphate diester and having the following structure:[Formula: see text]

scholarly journals Antigen valence determines the binding of nominal antigen to cytolytic T cell clones.

1985 ◽  
Vol 162 (2) ◽  
pp. 768-773 ◽  
Author(s):  
R F Siliciano ◽  
R M Colello ◽  
A D Keegan ◽  
R Z Dintzis ◽  
H M Dintzis ◽  
...  
Keyword(s):  
Molecular Weight ◽  
T Cell ◽  
High Molecular Weight ◽  
Cytotoxic T Cell ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
T Cell Clones ◽  
Cell Clones ◽  
Nominal Antigen ◽  
Epitope Density

We have shown that cytotoxic T cell clones specific for the nominal antigen FL will bind high molecular weight (600,000 to 2,000,000) polyacrylamide and Ficoll polymers conjugated with 200-600 FL groups per molecule. Low molecular weight polymers (40,000) with the same epitope density did not give stable binding. A high molecular weight polymer with a lower epitope density also failed to bind. Taken together, these results suggest that a substantial degree of multivalence is a necessary factor in the stable binding of nominal antigen to T cell clones.

Rheological properties of high molecular weight polymer solutions

1973 ◽  
Vol 25 (6) ◽  
pp. 1554-1558
Author(s):  
Z. R. Gorbis ◽  
T. A. Rogovskii ◽  
S. P. Shul'gin
Keyword(s):  
Molecular Weight ◽  
Rheological Properties ◽  
High Molecular Weight ◽  
Polymer Solutions ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer
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