Synthesis and Characterization of Large-Core Star Polymers and Polymer Networks: Effects of Arm Length and Composition of the Cross-Linking Mixture

2009 ◽  
Vol 210 (5) ◽  
pp. 367-376 ◽  
Author(s):  
Demetris Kafouris ◽  
Michael Gradzielski ◽  
Costas S. Patrickios
Keyword(s):  
Polymer Networks ◽  
Star Polymers ◽  
Synthesis And Characterization ◽  
Cross Linking ◽  
Large Core ◽  
The Cross

Synthesis and Characterization of Saturated and Unsaturated Poly(alkylene tartrate)s and Further Cross-linking

2000 ◽  
Vol 15 (1) ◽  
pp. 60-71 ◽  
Author(s):  
A. BORZACCHIELLO ◽  
L. AMBROSIO ◽  
L. NICOLAIS ◽  
S. J. HUANG
Keyword(s):  
Synthesis And Characterization ◽  
Cross Linking

scholarly journals Synthesis and Characterization of Clay Polymer Nanocomposites of P(4VP-co-AAm) and Their Application for the Removal of Atrazine

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 721 ◽  
Author(s):  
Jorge A. Ramírez-Gómez ◽  
Javier Illescas ◽  
María del Carmen Díaz-Nava ◽  
Claudia Muro-Urista ◽  
Sonia Martínez-Gallegos ◽  
...  
Keyword(s):  
Polymer Nanocomposites ◽  
Nanocomposite Materials ◽  
Synthesis And Characterization ◽  
Cross Linking ◽  
X Ray Diffraction ◽  
Numerous Species ◽  
X Ray ◽  
Different Types ◽  
Synthesized Materials

Atrazine (ATZ) is an herbicide which is applied to the soil, and its mechanism of action involves the inhibition of photosynthesis. One of its main functions is to control the appearance of weeds in crops, primarily in corn, sorghum, sugar cane, and wheat; however, it is very toxic for numerous species, including humans. Therefore, this work deals with the adsorption of ATZ from aqueous solutions using nanocomposite materials, synthesized with two different types of organo-modified clays. Those were obtained by the free radical polymerization of 4-vinylpyridine (4VP) and acrylamide (AAm) in different stoichiometric ratios, using tetrabutylphosphonium persulfate (TBPPS) as a radical initiator and N,N′-methylenebisacrylamide (BIS) as cross-linking agent. The structural, morphological, and textural characteristics of clays, copolymers, and nanocomposites were determined through different analytical and instrumental techniques, i.e., X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). Adsorption kinetics experiments of ATZ were determined with the modified and synthesized materials, and the effect of the ratio between 4VP and AAm moieties on the removal capacities of the obtained nanocomposites was evaluated. Finally, from these sets of experiments, it was demonstrated that the synthesized nanocomposites with higher molar fractions of 4VP obtained the highest removal percentages of ATZ.

Synthesis and Characterization of Dendrimer-Based Polysarcosine Star Polymers: Well-Defined, Versatile Platforms Designed for Drug-Delivery Applications

2020 ◽  
Vol 21 (8) ◽  
pp. 3332-3341 ◽  
Author(s):  
Richard M. England ◽  
Jennifer I. Moss ◽  
Anders Gunnarsson ◽  
Jeremy S. Parker ◽  
Marianne B. Ashford
Keyword(s):  
Drug Delivery ◽  
Star Polymers ◽  
Synthesis And Characterization ◽  
Drug Delivery Applications

Synthesis and characterization of well-defined star polymers via a controlled sol-gel process

1991 ◽  
Vol 24 (6) ◽  
pp. 1431-1434 ◽  
Author(s):  
Timothy E. Long ◽  
Larry W. Kelts ◽  
S. Richard Turner ◽  
Jeffrey A. Wesson ◽  
Thomas H. Mourey
Keyword(s):  
Sol Gel ◽  
Star Polymers ◽  
Synthesis And Characterization ◽  
Sol Gel Process
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