Showing papers in "European Polymer Journal in 1994"

TL;DR: In this paper, the influence of initiator concentration, ionic strength of the aqueous phase and styrene sulfonic acid sodium salt comonomer on the average particle size and particle uniformity of latexes generated via emulsifier-free emulsion polymerization of styrene has been studied.

TL;DR: In this paper, the effects of Tol/Hep ratio, dilution of the monomers and divinylbenzene content on the porous structure formation and swelling properties of the copolymers were investigated.

TL;DR: In this article, a rheological model for concentrated emulsions of viscoelastic liquids is presented, where the linear visco-elastic behavior of three kinds of polymer blends in the melt could be accounted for quantitatively.

TL;DR: In this paper, the effects of formation parameters (e.g. electrolyte recycling, current density, temperature, solvent, the amount of water in the reaction mixture and film thickness) on the conductivity and morphology of the prepared polypyrrole (PPy) films were studied.

TL;DR: In this paper, thermal oxidation of two grades of purified epoxidized natural rubber (ENR 25 and ENR 50) and one grade of unmodified SMR L grade were studied using Fourier Transform Infrared Spectroscopy (FTIR).

TL;DR: The effect of the molar mass of polyoxyethylene, POE, upon the mechanism of complexation with polymethacrylic acid, PMAA, has been examined, using pH, density, calorimetric and cloud point studies as discussed by the authors.

TL;DR: In this article, the main degradation process of polyethylene oxide is determined to be due to CO and CC scissions yielding fragments characteristic of the polymer, and an evolved gas analysis indicates formation of small molecular stable compounds such as C 2H 5 OC 2 H 5, CH 3 CHO, CO 2, CO and C 2 H 4.

TL;DR: In this article, a nouvelle famille de polyethers multifonctionnels a ete synthetisee avec des rendements convenables (50 a 80%) par polycondensation de l'isosorbide, with des derives dihalogenes aliphatiques et aromatiques en milieu heterogene solide liquide constitue de KOH solide dans le DMSO.

TL;DR: In this paper, the effects of epoxy amine ratio and accelerator concentration on the chemical structure of networks based on the diglycidylether of bisphenol A cured with 4,4′-diaminodiphenylmethane using imidazole as accelerator were investigated.

TL;DR: In this article, a conformational and packing energy analysis of syndiotactic polystyrene has been carried out, where the conformational energy has been optimized as a function of the internal parameters of the chain.

TL;DR: In this paper, the interacting blends of poly(acrylic acid) with poly(vinyl pyrrolidone) or poly (vinyl alcohol) in aqueous solutions have been studied by ultrasonic, rheological and viscometric techniques.

TL;DR: In this paper, the effect of moisture on the poly(ethylene terephtalate) (PET) thermal properties has been investigated using differential scanning calorimetry.

TL;DR: In this paper, the maleinisation of LDPE in various aromatic solvents in the presence of radical initiators was studied and a strong influence of the solvent on the reaction was observed and attributed mainly to presence of benzylic hydrogens in the solvent molecule.

TL;DR: In this paper, the effect of different cocatalysts in slurry phase polyethylene production using a high active Ziegler/Natta catalyst precursor was studied under different polymerization start-up methods.

TL;DR: In this article, a series of poly(styrene-b-ethylene oxide) copolymers were investigated as stabilizers for the dispersion polymerization of styrene in methanol.

TL;DR: In this paper, the compatibility behavior of melt-mixed blends of poly(ethylene terephthalate) (PET) with the sodium ionomer of poly (ethylene-co-methacrylic acid) were investigated in the complete composition range.

TL;DR: Positron annihilation lifetime (PAL) measurements are reported on a series of chemically different cured epoxy resin systems in this paper, which indicates the effects of changes in the cure temperature and chemical structure on the average molecular free volume size.

TL;DR: In this paper, a mixture of polystyrene and polyethylene was copolymerized in the presence of a catalytic system based on CpTiCl3 and methylaluminoxane.

TL;DR: In this paper, it was shown that polyamides with carboxylic end-groups do not lead to colour changes of the material and that the higher the content of carboxyl groups, the faster the polymers are oxidized.

TL;DR: In this paper, the metal complexing ability of the resulting insoluble polystyrene-dithiocarbamates was investigated towards Fe(III), Ni(II), Cu(II) and Zn(II).

TL;DR: In this article, the decrease of electrical conductivity in air of both electrochemically and chemically synthesized polypyrroles is studied and it appears to follow a first-order kinetics.

TL;DR: In this paper, samples of PVC plasticized by di-isobutylphthalate and di-2-ethylhexylphthalates, with plasti-cizer content varying up to 180 parts per hundred, have been examined using solid-state tH- and t3C-NMR.

TL;DR: A-B-A type block copolymers (GIG) composed of poly(γ-bezyl l -glutamate) (PBLG) as the A component and polyisoprene (PI) as B component were prepared in this paper.

TL;DR: In this article, the effect of CS 2 on the catalytic system TiCl 4 /MgCl 2 /DBPH-AlEt 3 /TEPS in propylene polymerization in the presence and absence of hydrogen was studied.

TL;DR: Positron annihilation lifetime spectroscopy (PALS) and Doppler broadening spectroscopic (DBS) measurements were reported on poly(2,2-bis trifluoro 4,5 difluor 1,3-dioxole) over the temperature range 303-423 K as discussed by the authors.

TL;DR: In this paper, the effects of the structure and content of phosphorus-and nitrogen-containing polyols on properties of rigid polyurethane foams, especially on their resistance to combustion, have been investigated.

TL;DR: In this article, the conductivity of PANI particles in a pressed pellet form ranged between 0.03 and 5 S cm−1 depending on the synthesis condition and was best effected in aqueous alcohol media.

TL;DR: The tendency of aggregation of 3-alkyl-1-vinylimidazolium bromides was studied by viscosity measurements and fluorescence probes which revealed the formation of hydrophobic microdomains.

TL;DR: In this article, the solubility and diffusion coefficient of random copolymers of ethylene/α-olefin were determined and the mixing effect became more pronounced as the partial pressure of the more soluble gas in the gas phase increased.

TL;DR: In this paper, the kinetics of ceric ion-poly(ethylene glycol) (PEG, mol. wt 6000) redox-coupled-initiated polymerization of acrylonitrile (M), yielding a block copolymer of PEG and poly(acryylonitrile)(PAN) in aqueous sulphuric acid medium, has been investigated.