Polymer Science, Series A
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Absolute molecular mass determination of sodium salt of styrene/methacrylic acid copolymer by gel permeation chromatography coupled with multi angle laser light scattering
Polymer Science, Series A - Tập 57 - Trang 383-388 - 2015
Sodium salt of styrene/methacrylic acid copolymer was synthesized via radical polymerization, and its absolute molecular mass and polydispersity index were measured by aqueous-based GPC coupled with MALLS in a mixed solvent containing 75/25, v/v%, methanol/water, 38.6 mM NaCl and 10.0 mM NaH2PO4 buffer, pH 6.0. Dynamic light scattering verified the absence of aggregation of copolymer in preferred ...... hiện toàn bộ
Thermodynamics of deformation and swelling of crosslinked polymers under small deformations
Polymer Science, Series A - - 2012
Chemical modification of poly(vinyltrimethylsilane) and poly(1-trimethylsilyl-1-propyne) using highly reactive metallating systems
Polymer Science, Series A - Tập 48 - Trang 489-497 - 2006
Poly(vinyltrimethylsilane) and poly(1-trimethylsilyl-1-propyne) are metallated using normal and secondary butyllithium chelate complexes with tetramethylethylenediamine and superbases based on complexes of normal and secondary butyllithium with potassium tert-pentoxide as metallating agents. Optimal conditions ensuring metallation of poly(vinyltrimethylsilane) and poly(1-trimethylsilyl-1-propyne) ...... hiện toàn bộ
Physicochemical Characterization of α-Chitin Whiskers-Reinforced Chitosan Nanocomposite Films
Polymer Science, Series A - Tập 64 - Trang 487-492 - 2022
Chitosan is a chitin-derived biopolymer characterized by excellent bioactive properties, such as biodegradability and biocompatibility. In addition, due to its high film forming capability, chitosan is emerged as a promising natural polymer for tissue engineering. However, its application areas can be further extended by the improvement of its poor mechanical properties. In this context, the curre...... hiện toàn bộ
Interaction of two polyelectrolyte gels in solution of an oppositely charged surfactant
Polymer Science, Series A - Tập 49 - Trang 1129-1136 - 2007
The behavior of two charged polymer networks in a solution of an oppositely charged surfactant was studied. It was shown that such a system (depending on preset parameters) can exist in different modes: without micelles in both networks, with micelles in one of the network, and with micelles in both networks. The dependences of network dimensions and ion concentrations inside the networks on the s...... hiện toàn bộ
Dipole moment and conformational properties of poly(methacrylic acid) in solvents with hydrogen bonding
Polymer Science, Series A - Tập 48 - Trang 428-434 - 2006
Dielectric polarization of solutions of un-ionized linear poly(methacrylic acid) in polar associated liquids is studied in the temperature range 20–50°C. The solutions are in methanol, with the molar fraction of polymer units x
2 = (3 × 10−3)−(1.5 × 10−2), and in water, with x
2 = (4 × 10−5)−(4 × 10−3). The permittivity ε12 of the polyacid solutions in methanol is shown to be lower than the permit...... hiện toàn bộ
Shape memory effect in the epoxy polymer composites with aggregated filler
Polymer Science, Series A - Tập 51 - Trang 416-423 - 2009
The specific features of the stress-induced shape memory effect are studied for composites based on various polymers and fillers, which can form aggregates and are capable of marked compaction. The appropriate deformation schemes make it possible to prepare composites with different structural states, which give various signs and ratios between longitudinal and transversal strains upon shape recov...... hiện toàn bộ
Synthesis and electrochemical properties of ruthenium(II) complexes with biquinoline-containing polyamic acids—Polybenzoxazinone prepolymers
Polymer Science, Series A - Tập 48 - Trang 359-366 - 2006
New polyamic acids with biquinoline units in the backbone, which are prepolymers of polybenzoxazinones, as well as their metal-polymer complexes containing [Ru(bpy)2]2+, were prepared. The electronic structure of these polymers was studied with the use of cyclic voltammetry, electronic absorption spectroscopy, and quantum-chemical calculations, and the location sites of electronic changes upon ele...... hiện toàn bộ
Local mobility and structure of cationic amphiphilic diblock copolymer micelles in aqueous solutions
Polymer Science, Series A - Tập 52 - Trang 235-242 - 2010
The local mobility and organization of micelles formed by the cationic diblock copolymer PS-poly(N-ethyl-4-vinylpyridinium bromide) in dilute aqueous solutions is studied by spin-probe ESR spectroscopy. Micelles composed of a hydrophobic PS core and a lyophilizing polyelectrolyte corona are prepared by two methods: dialysis from a nonselective solvent and direct dispersion of the diblock copolymer...... hiện toàn bộ
Evaluation of Environment Exposure Potential of Atrazine Herbicide and Synthesis of Polymeric Controlled Release Pesticide Formulations
Polymer Science, Series A - - 2024
A thorough understanding of pesticide fate in soil and replacement of traditional pesticide formulations with polymeric controlled release pesticide formulations may provide a preventive approach for safer and more effective application of pesticides in the field. In this direction, the present study discusses the soil adsorption study of atrazine herbicide on Indian soil and synthesis of polymeri...... hiện toàn bộ
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