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Гаврилин, М. В.

doi:10.1023/a:1010402826818

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…As compared with other living radical polymerizations, ATRP is a versatile technology for preparing block copolymers with well-controlled chemical composition and morphology and it is suitable for monomers with a wide range of polarity. − This chemical versatility allows to obtain materials with unique mechanical properties, providing additional modes for regulating the release of therapeutic agents and for producing surfaces that are compatible with the in vivo environment . In this field, polymers based on acrylic acid have become increasingly important in application for coatings and biomaterials . However acrylic acid or methacrylic acid are difficult to be directly polymerized by ATRP because of interactions of the carboxylic acid functionalities with the catalyst.…”

Section: Introductionmentioning

confidence: 99%

New Self-Assembling Polyaspartamide-Based Brush Copolymers Obtained by Atom Transfer Radical Polymerization

et al. 2009

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A simple and efficient method for the synthesis of polyaspartamide-based brush copolymers using Atom Transfer Radical Polymerization (ATRP) is here presented. The syntheses were performed by using two subsequent steps. In the first step the macroinitiator was obtained by the conjugation of a proper number of 2-bromoisobutyryl bromide (BIB) residues to the R,β-poly(N-2-hydroxyethyl)-D,L-aspartamide (PHEA) side chains, obtaining the PHEA-BIB copolymer. PHEA-BIB copolymer was used as "multi-functional macroinitiator" for the polymerization via ATRP of hydrophilic methacrylic monomers, such as methacrylic acid (MA), obtaining PHEA-IB-poly(MA) copolymer, sodium methacrylate (MANa + ), obtaining PHEA-IB-poly(MANa + ) copolymer, or hydrophobic monomer such as butyl methacrylate (BMA), obtaining PHEA-IB-poly(BMA) copolymer. BMA was also homopolymerized subsequently MANa + polymerization, extending the poly(MANa + ) chains by poly(BMA) chains arising PHEA-IB-poly(MANa + )-block-poly(BMA) copolymer. Different solvent and temperature conditions were used in order to obtain the best ATRP conditions for each monomer in term of high polymerization efficiency in PHEA side chain. All the synthesized PHEA-based brush copolymers were widely characterized and copolymer self-assembling properties in aqueous media were evaluated by turbidimetry measurements, light scattering and SEM analyses. PHEA-IB-poly(MANa + ) resulted able to form spherical microparticles at pH 2, with a diameter from 1 -5 µm. PHEA-IB-poly(MANa + )-block-poly(BMA) copolymer formed particles at elliptic shape and an internal hollow architecture with an outer diameter of 1-4 µm. Finally, PHEA-IB-poly(BMA) copolymer resulted able to produce microfibers in aqueous medium, with an homogeneous tube shape and a thickness ranging from 3 to 5 µm.

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Section: Introductionmentioning

confidence: 99%

New Self-Assembling Polyaspartamide-Based Brush Copolymers Obtained by Atom Transfer Radical Polymerization

et al. 2009

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“…as substrates. 64 These compounds provide continuous supply of drugs into an organism so that their concentration is close to a minimum therapeutic level and does not reach a toxic level. The equilibrium distribution of various iodine forms (free iodine, triiodide, polymeric iodine triiodide and triiodide complexes, and iodide ion) in aqueous solutions of povidone-iodine drugs has been analyzed.…”

Section: Organic Iodine Halidesmentioning

confidence: 99%

Organoiodine complexes: Structural and functional variety

Chernov’yants

Бурыкин

2009

Russ Chem Bull

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The present review summarizes the results of structural studies of organoiodine complexes. Particular emphasis is given to the role of intermolecular interactions such as halogenhalogen (I...I), hydrophobic, π-π stacking, and hydrogen bonds (C-H...I) in the formation of supramolecular iodine containing architectures. The molecular formula, size, shape, and stability of the polyhalide ion and the way of its coordination by an outer sphere cation or an organic macromolecule depend on the nature and symmetry of the cationic environment, the ability of a solvating solvent to form complexes with iodine, and the conditions of the synthesis. Efforts have been made to highlight a structural and functional variety of iodine containing complexes and estimate the prospects of using them as organic conductors, magnetic materials, liquid electrolytes, and biologically active compounds.

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“…The bio -adhesive property of PAM is utilized in controlled drug delivery systems (Roy & Prabhakar, 2010). PAM is adopted for a variety of wet end applications; it is utilized for electrophoresis, water clarification (in order to flocculate solids in waste water), oil recovery and biomedical applications (Green et al, 2000;Wever et al, 2013, Gavrilin, 2001. The structure and physical properties of PAM based materials are widely studied.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on Nano Titania - Polyacrylamide Composite Films

Veena¹,

Lobo²

2022

JSR

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TiO2 nanoparticles (titania) filled polyacrylamide (PAM) based composite films were prepared by solution casting technique, with filler levels (FLs) varying from 0.0 up to 19.50 Wt%. Spectroscopic, thermal, and electrical properties of these composite films were experimentally studied. Optical studies revealed a decrease in optical band gap of TiO2 NPs filled PAM composite with increase in titania NP content in the composite, and also showed the formation of intermediate bands due to formation of CTCs. Thermal studies revealed that TiO2 NP filled PAM composite samples exhibited low value of Tg and improved thermal stability at low (0.02 and 0.4 Wt%) and moderate FLs. The samples were subjected to temperature dependent Direct current (DC) electrical measurements in the temperature range of 303K to 340K. Variable Range Hopping (VRH) model was used to analyze the data. Activation energy and mott parameters were determined from VRH model. Results revealed a decrease in activation energy for thermally stimulated mobility of charge carriers, and so the electrical conductivity increases at low FLs. SEM images revealed good dispersion of titania NPs in the polymeric (PAM) host material at low FLs (FL = 0.02 and 0.4 Wt%). EDS spectra indicated the existence of C, N, O, Ti elements as the constituents of the studied polymer composites.

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Untitled

Cited by 12 publications

References 19 publications

New Self-Assembling Polyaspartamide-Based Brush Copolymers Obtained by Atom Transfer Radical Polymerization

New Self-Assembling Polyaspartamide-Based Brush Copolymers Obtained by Atom Transfer Radical Polymerization

Organoiodine complexes: Structural and functional variety

Experimental investigations on Nano Titania - Polyacrylamide Composite Films

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