Synthesis of Heterocycles from the Products of Anionic Arylation of Unsaturated Compounds. Part 7. Products of Haloarylation of Acrylic Acid and Its Esters in the Synthesis of Benzo[b]thiophene Derivatives.

ChemInform ◽  
2004 ◽  
Vol 35 (16) ◽  
Author(s):  
N. D. Obushak ◽  
V. S. Matiichuk ◽  
R. L. Martyak
Keyword(s):  
Acrylic Acid ◽  
Unsaturated Compounds ◽  
Thiophene Derivatives

The Combined Action of Maleic N-Methylimide and p-Bromobenzoyl Peroxide on Natural Rubber

1948 ◽  
Vol 21 (2) ◽  
pp. 344-346
Author(s):  
André Delalande
Keyword(s):  
Maleic Anhydride ◽  
Acrylic Acid ◽  
Natural Rubber ◽  
Benzoyl Peroxide ◽  
Present Author ◽  
Atmospheric Oxygen ◽  
Bromine Atom ◽  
Unsaturated Compounds ◽  
Combined Action ◽  
In Virtue Of

Abstract It is already known that natural rubber is capable of combining, under certain conditions, with various unsaturated compounds. Bacon and Farmer, for example, have fixed maleic anhydride on rubber in solution in the presence of benzoyl peroxide. This reaction has been applied likewise to acrylic acid, to acrylonitrile and to methacrylonitrile. Bacon and Farmer carried out the reaction with solutions of rubber which were refluxed for 18 hours, without, however, attempting to avoid the extraneous effect of atmospheric oxygen. The present author was, therefore, prompted to carry out the reaction protected from air in sealed tubes into which the solvent was introduced by distillation in a vacuum according to a technique based on that employed by Moureu and Dufraisse in their studies of autoxidation. In an effort to explain the mechanism of the reactions, maleic N-methylimide was chosen as the unsaturated reagent in the reaction and p-bromobenzoyl peroxide as the catalyst. These two compounds, in virtue of the nitrogen atoms and bromine atom in their respective molecules, made it possible to determine by analysis what became of them as a result of the reaction.

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

The Role of the Initiator System in the Synthesis of Acidic Multifunctional Nanoparticles Designed for Molecular Imprinting of Proteins

2020 ◽  
Vol 65 (1) ◽  
pp. 28-41
Author(s):  
Marwa Aly Ahmed ◽  
Júlia Erdőssy ◽  
Viola Horváth
Keyword(s):  
Acrylic Acid ◽  
Binding Affinity ◽  
Molecular Imprinting ◽  
Low Temperatures ◽  
Ammonium Persulfate ◽  
Sodium Bisulfite ◽  
Multifunctional Nanoparticles ◽  
High Affinity ◽  
Initiator System

Multifunctional nanoparticles have been shown earlier to bind certain proteins with high affinity and the binding affinity could be enhanced by molecular imprinting of the target protein. In this work different initiator systems were used and compared during the synthesis of poly (N-isopropylacrylamide-co-acrylic acid-co-N-tert-butylacrylamide) nanoparticles with respect to their future applicability in molecular imprinting of lysozyme. The decomposition of ammonium persulfate initiator was initiated either thermally at 60 °C or by using redox activators, namely tetramethylethylenediamine or sodium bisulfite at low temperatures. Morphology differences in the resulting nanoparticles have been revealed using scanning electron microscopy and dynamic light scattering. During polymerization the conversion of each monomer was followed in time. Striking differences were demonstrated in the incorporation rate of acrylic acid between the tetramethylethylenediamine catalyzed initiation and the other systems. This led to a completely different nanoparticle microstructure the consequence of which was the distinctly lower lysozyme binding affinity. On the contrary, the use of sodium bisulfite activation resulted in similar nanoparticle structural homogeneity and protein binding affinity as the thermal initiation.

Sign in / Sign up

Export Citation Format

Share Document