Interpolyelectrolyte complexes based on hydrolyzed polyacrylonitrile for. anti‐erosion stabilization of soils and grounds.

2021 ◽  
Author(s):  
Olga A Novoskoltseva ◽  
Natalia G Loiko ◽  
Yury A Nikolaev ◽  
Andrey O Lisin ◽  
Irina G Panova ◽  
...  
Keyword(s):  
Interpolyelectrolyte Complexes

Morphology of Water-Soluble Interpolyelectrolyte Complexes Formed by Poly(2-vinylpyridinium)-block-poly(ethylene oxide) Diblocks and Poly(4-styrenesulfonate) Polyanions

2001 ◽  
Vol 34 (9) ◽  
pp. 2745-2747 ◽  
Author(s):  
Jean-François Gohy ◽  
Sunil K. Varshney ◽  
Robert Jérôme
Keyword(s):  
Ethylene Oxide ◽  
Water Soluble ◽  
Interpolyelectrolyte Complexes ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Equilibria in interpolyelectrolyte reactions and the phenomenon of molecular "recognition" in solutions of interpolyelectrolyte complexes

1991 ◽  
Vol 60 (7) ◽  
pp. 792-806 ◽  
Author(s):  
V A Izumrudov ◽  
Aleksandr B Zezin ◽  
Viktor A Kabanov
Keyword(s):  
Molecular Recognition ◽  
Interpolyelectrolyte Complexes

scholarly journals Effect of chemical structure and linear density charge of sulfonate-containing aromatic polyamides on interaction with polycations in organic and water-organic media

2019 ◽  
Vol 60 (11) ◽  
pp. 40-47
Author(s):  
Natalya N. Smirnova ◽  
Keyword(s):  
Chemical Structure ◽  
Phase State ◽  
Linear Charge ◽  
Linear Charge Density ◽  
Sodium Sulfonate ◽  
Interpolyelectrolyte Complexes ◽  
Composition And Structure ◽  
Average Size ◽  
Organic Solutions ◽  
Acrylonitrile Copolymers

The interaction of sulfonate-containing aromatic poly- and copolyamides with acrylonitrile copolymers with N,N-dimethyl-N,N-diallylammonium chloride (DMDAAC) and N,N-diethylaminoethylmethacrylate (DEAEM) in organic and water-organic solutions was studied. It was shown that as a result of macromolecular reactions interpolyelectrolyte complexes (IPEC) forms. They are stabilized mainly by electrostatic forces. To characterize the interpolyelectrolyte complexes composition the φ parameter was used, that defines as the ratio of corresponding functional groups molar concentrations of interacting polyelectrolytes. The transformation degree in interpolymer reactions θ was calculated as the ratio of the salt bonds number between polyions to their maximum possible number. It was shown that the main factors determining the composition and structure of forming interpolyelectrolyte complexes are linear charge density of polyelectrolytes, the nature and composition of the solvent in which interpolymer reactions occurs. It is possible to obtain IPEC, the composition of which for the same polycation will vary from φ = 2.5 to φ = 1.0, changing these factors. It was found that at the complexation process is not accompanied by a change in the phase state of the interpolymer system, when the concentration of units with sulfonate groups in the macromolecular polyamide chain 5 mol.%. It was found that the introduction of polycation leads to the formation of IPEC structures in the form of particles with an average size of ~217.7 nm for poly-4,4'-(2-sodium sulfonate) – diphenylaminisophthalamide and ~248.1 nm in the case of poly-4,4'-(2-sodium sulfonate) -diphenylaminterephthalamide. It was shown that the decrease in the polymer content of units with sulfonate groups is accompanied by a decrease in the transformation degree from 0.65-0.66 to 0.18. It was found that the studied complexes can be transferred to the solution by increasing its ionic strength. The result obtained during this work can serve as a base for the development of for the manufacturing technology of film and membrane materials based on sulfonate-containing aromatic poly- and copolyamides.

scholarly journals Formulation Development and Evaluation of Drug Release Kinetics from Colon-Targeted Ibuprofen Tablets Based on Eudragit RL 100-Chitosan Interpolyelectrolyte Complexes

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Kenneth Chibuzor Ofokansi ◽  
Franklin Chimaobi Kenechukwu
Keyword(s):  
Drug Release ◽  
Targeted Delivery ◽  
Release Kinetics ◽  
Local Treatment ◽  
Wet Granulation ◽  
Formulation Development ◽  
Swelling Properties ◽  
Interpolyelectrolyte Complexes ◽  
Bowel Diseases

Colon-targeted drug delivery systems (CTDDSs) could be useful for local treatment of inflammatory bowel diseases (IBDs). In this study, various interpolyelectrolyte complexes (IPECs), formed between Eudragit RL100 (EL) and chitosan (CS), by nonstoichiometric method, and tablets based on the IPECs, prepared by wet granulation, were evaluated as potential oral CTDDSs for ibuprofen (IBF). Results obtained showed that the tablets conformed to compendial requirements for acceptance and that CS and EL formed IPECs that showed pH-dependent swelling properties and prolonged the in vitro release of IBF from the tablets in the following descending order: 3 : 2 > 2 : 3 > 1 : 1 ratios of CS and EL. An electrostatic interaction between the carbonyl (–CO–) group of EL and amino (–) group of CS of the tablets formulated with the IPECs was capable of preventing drug release in the stomach and small intestine and helped in delivering the drug to the colon. Kinetic analysis of drug release profiles showed that the systems predominantly released IBF in a zero-order manner. IPECs based on CS and EL could be exploited successfully for colon-targeted delivery of IBF in the treatment of IBDs.

scholarly journals Micellar interpolyelectrolyte complexes

2012 ◽  
Vol 41 (21) ◽  
pp. 6888 ◽  
Author(s):  
Dmitry V. Pergushov ◽  
Axel H. E. Müller ◽  
Felix H. Schacher
Keyword(s):  
Interpolyelectrolyte Complexes

Interpolyelectrolyte complexes of maleic acid copolymers and chitosan for stabilization and functionalization of magnetite nano- and microparticles

2013 ◽  
Vol 131 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Nadezhda Samoilova ◽  
Vladimir Tikhonov ◽  
Maria Krayukhina ◽  
Igor Yamskov
Keyword(s):  
Maleic Acid ◽  
Interpolyelectrolyte Complexes

Interpolyelectrolyte complexes as effective structure‐forming agents for Chernozem soil

2020 ◽  
Author(s):  
Irina G. Panova ◽  
Valeriy V. Demidov ◽  
Pavel S. Shulga ◽  
Leonid O. Ilyasov ◽  
Marina А. Butilkina ◽  
...  
Keyword(s):  
Chernozem Soil ◽  
Interpolyelectrolyte Complexes

Corona-Stabilized Interpolyelectrolyte Complexes of SiRNA with Nonimmunogenic, Hydrophilic/Cationic Block Copolymers Prepared by Aqueous RAFT Polymerization†

2006 ◽  
Vol 39 (20) ◽  
pp. 6871-6881 ◽  
Author(s):  
Charles W. Scales ◽  
Faqing Huang ◽  
Na Li ◽  
Yulia A. Vasilieva ◽  
Jacob Ray ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Raft Polymerization ◽  
Interpolyelectrolyte Complexes

Soluble and highly ionically conducting interpolyelectrolyte complexes prepared via chemical template polymerization of aniline in the presence of perfluorinated polysulfonic acid

RSC Advances ◽  
2014 ◽  
Vol 4 (100) ◽  
pp. 56677-56681 ◽  
Author(s):  
Zhanna A. Boeva ◽  
Vladimir Sergeyev
Keyword(s):  
Proton Conductivity ◽  
High Proton Conductivity ◽  
Template Polymerization ◽  
Interpolyelectrolyte Complexes ◽  
High Proton

Proton conductivity of the PANI–MF-4SC composites vs. [ANI]:[MF-4SC] ratio. Template polymerization of aniline in the presence of MF-4SC is carried out in water/2-propanol and results in the formation of the complexes with high proton conductivity.

Potential carriers for controlled drug release based on interpolyelectrolyte complexes using Eudragit® types EPO and L100-55. I. Synthesis and comparative physicochemical evaluation

2010 ◽  
Vol 44 (6) ◽  
pp. 319-323 ◽  
Author(s):  
R. I. Mustafin ◽  
O. L. Bobyleva ◽  
V. L. Bobyleva ◽  
G. Van den Mooter ◽  
V. A. Kemenova
Keyword(s):  
Drug Release ◽  
Controlled Drug Release ◽  
Interpolyelectrolyte Complexes ◽  
Physicochemical Evaluation
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