Showing papers in "European Polymer Journal in 2003"

TL;DR: In this paper, a review of recent notable advances in the application of hyperbranched dendrimers in terms of the development of new polymeric delivery systems is presented.

TL;DR: In this paper, a fast-swelling highly porous superabsorbent hydrogels were synthesized through a rapid solution polymerization of concentrated partially neutralized acrylic acid under normal atmospheric conditions.

TL;DR: In this article, the percolation threshold of PMMA/NanoG conducting films at room temperature was as low as 0.31 vol%, much lower than that of the composites filled with conventional graphite particles.

TL;DR: In this article, polypropylene-clay nanocomposites are obtained and studied by using two different coupling agents, diethyl maleate and maleic anhydride.

TL;DR: In this paper, the effects of preparation parameters such as PVP content in the hydrogel and irradiation dose on the swelling behavior of the PVP/AAc copolymer hydrogels were studied.

TL;DR: In this article, room temperature ionic liquids (ILs) based on imidazolium salts, were found to be excellent plasticizers for poly(methyl methacrylate), with improved thermal stability, and the ability to reduce glass transition temperatures to near 0 °C.

TL;DR: In this paper, aqueous emulsion of polyurethane ionomers, based on poly(tetramethylene glycol) or poly(butylene adipate) as soft segment, isophorone diisocyanate as diiscyanate, 1,4-butandiol as chain extender, dimethyl propionic acid as potential ionic center, triethylene tetramine as crosslinker, and triethyl amine as neutralizer, were reinforced with organoclay to give nanocomposites.

TL;DR: In this article, the physical properties of nylon 6 nonwoven mat produced from solutions with formic acid were examined regarding their morphology, pore size, surface area, and gas transport properties.

TL;DR: In this paper, the graft copolymerization of methacrylic acid (MAA) onto carboxymethyl chitosan (CMCTS) using ammonium persulfate (APS) as an initiator was carried out in an aqueous solution.

TL;DR: In this article, the enthalpy of fusion and fractional crystallinity have been measured as a function of temperature for metallocene polyethylene and polyethylenes terephthalate during heating, which is in good agreement with that determined by density and wide angle X-ray diffraction.

TL;DR: In this article, a water-soluble O-succinyl-chitosan was established by using one three-step reaction, and the protection group was removed by using hydrazine hydrate.

TL;DR: In this paper, the melting behavior of polyvinylidene fluoride (PVDF) was investigated by differential scanning calorimetry (DSC) and small-and wide-angle X-ray scattering in order to study the influence of the chain defects content and of the temperature of annealing on the crystallization and melting behaviour.

TL;DR: In this paper, the conductivity of chitosan-LiOAc-doped polymers was investigated as a function of temperature between 300 and 363 K. XRD and FTIR spectroscopy techniques have been used for the structural studies.

TL;DR: In this paper, a step-by-step synthesis/purification of poly(amidoamine) PAMAMAM dendrimers was performed using MALDI-TOF MS in the linear and reflectron mode.

TL;DR: In this paper, the melt-direct intercalation method was employed to prepare polypropylene (PP)/maleic anhydride grafted polypropane (PP-g-MAH)/organic-montmorillonite (Org-MMT) composites and X-ray diffractometer was used to investigate the intercalator effect and crystallite size in composites.

TL;DR: In this paper, the synthesis of linear-dendritic thermoreversible hydrogel copolymers was achieved via two procedures: an esterification step using thionylchloride and pyridine, and a second procedure using dicyclohexyl carbodiimide (DHCD) and Pyridine.

TL;DR: Using gamma-radiation as initiation source at ambient temperatures (i.e. T approximate to 20 degreesC) for reversible addition-fragmentation chain transfer (RAFT) polymerizations allows for the generation of narrowly distributed polymeric material with living characteristics as mentioned in this paper.

TL;DR: In this article, a series of conducting interpenetrating polymer networks (IPNs) are prepared by sequential polymerization of castor oil based polyurethane (PU) with poly(methyl methacrylate) (PMMA) and polyaniline doped with camphor sulphonic acid (PAni)CSA.

TL;DR: In this paper, a rechargeable battery of the type Zn/ZnCl2, NH4Cl/polyaniline (PAn)-reticulated vitreous carbon was successfully prepared based on a PAn modified electrode.

TL;DR: In this article, a polyurethane network containing allophanate groups, based on hydroxyl terminated polybutadiene and various diisocyanates, was synthesized at various NCO/OH equivalence ratios (r-values) ranging from 1.0 to 1.5.

TL;DR: In this article, expandable graphite (EG) has been used in polyisocyanurate polyurethane (PIR-PUR) foams in order to improve fire behavior of such foams.

TL;DR: In this paper, the authors investigated the biomaterial and pharmaceutical utility of pure silk fibroin (SF) protein as a possible for separation, using Sephadex G-25 gel filtration chromatography and simply preparing SF microsphere particles (SFMP) by spray dryer.

TL;DR: In this article, high amylose corn starch (HACS) was etherified with 1-bromopropane in dimethyl sulfoxide, and the structure of the products was characterized by infra-red and 1H-NMR spectroscopy.

TL;DR: In this article, a polytrimethylene terephthalate (PTT)/clay nanocomposite has been successfully prepared via melt intercalation using a co-rotating twin screw extruder.

TL;DR: Analysis by gas chromatography and nuclear magnetic resonance of the elastomeric material revealed that PHAmcl is composed from essentially hydroxydecanoate and hydroxyoctanoate sequence units with a non-terminal double bond in about 6% of the side chains.

TL;DR: In this paper, the effects of different ratios of chemical structure of end groups were studied by evaluating various properties of WBHP such as solubility in water, dynamic viscosity, UV curing rate and final unsaturation conversion.

TL;DR: In this paper, the degree of compatibility of three water-soluble polymer mixtures has been estimated on the basis of five criteria: (i) the sign of Δbm, (ii) Δbm′, (iii) Δ[η]m, (iv) sign of thermodynamic parameter α, and (v) modified thermodynamic parameters β based on the sign convention involved in these criteria, compatibility/miscibility was observed in CMC/PAM and MC/CMC systems and incompatibility/immiscibility in PVP/MC system.

TL;DR: In this article, polysulfone films were modified by ammonia, n-butylamine and allylamine remote plasma using various sample-toplasma distances and contact angle measurements, FTIR-ATR and XPS spectroscopy proved the presence of polar groups on the modified surface.

TL;DR: In this article, the kinetics of the thermal degradation and thermal oxidative degradation of poly(p-dioxanone) (PPDO) were investigated by thermogravimetric analysis Kissinger method, Friedman method, Flynn-Wall-Ozawa method and Coats-Redfern method.

TL;DR: The interaction between collagen and polyvinyl pyrrolidone (PVP) in blends has been studied by viscometry, differential scanning calorimetry (DSC) and by Fourier transform infrared spectroscopy (FTIR).