Water-soluble copolymers. 49. Effect of the distribution of the hydrophobic cationic monomer dimethyldodecyl(2-acrylamidoethyl)ammonium bromide on the solution behavior of associating acrylamide copolymers

A new approach to the synthesis of hydrophobically associating polyacrylamide via the inverse miniemulsion polymerization in the presence of template

“…Synthesis of N,N′ ′-dimethylpropylacrylamide N,N′-dimethylpropylacrylamide was synthesized according to the literature [22]. Dichloromethane solution (20 ml) with predissolved N,N′-dimethyl-1,3-propanediamine (4.17 g, 0.04 mol) and sodium hydroxide solution (7 ml, 6 mol/l) were added to a round bottom flask, cooled by ice-water bath and purged with nitrogen for 30 min at the same time.…”

“…DOAB was prepared via quaternization reaction [22,30] of N,N′-dimethylpropylacrylamide and 1-Bromooctane according to the following method:…”

“…As a result, the polymers exhibit higher thickening abilities than those with random distribution structure at the similar molar mass. However, the major disadvantages for this method are obvious: the initial concentration of the reaction mixture is relatively low because of gel effect during the course of poly-merization, and the water solubility of the HAPAM is often poor [10,21,22], which makes difficult its practical application. A variety of techniques have been suggested to overcome the problems mentioned above, such as inverse emulsion polymerization and inverse microemulsion polymerization, which can also be used to obtain HAPAM with higher solid content and better water solubility [23][24][25].…”

For Stimul-Responsive Polymers with Enhanced Efficiency in Reservoir Recovery Processes

“…[32][33][34][35] From the work of many researchers, the nature of hydrophobic associations has been shown to be dictated by many factors including, but not limited to polymer microstructure, [36][37][38][39][40][41] the 'bulkiness' of the hydrophobe, [42][43][44][45] and the chemical composition of the hydrophobe, i.e. (hydrocarbon vs. fluorocarbon).…”

Synthesis and characterization of a pressure-sensitive adhesive based on an isobutyl acrylate / 2-ethylhexyl acrylate copolymer

“…The microstructure of the copolymer is influenced by the amount of surfactant micelles present during the synthesis. It has been shown that the properties of emulsion-polymerized amphiphilic copolymers can be related directly to the ratio ([H]/[S]) of the concentration of hydrophobic monomer (H) and surfactant (S) [10]. The high local concentration of the hydrophobic monomers in the micelles favours their incorporation in the copolymers as blocks rather than isolated units.…”