Showing papers in "European Polymer Journal in 1992"

TL;DR: In this article, a new criterion is proposed based on the classical Huggins equation and the huggins coefficient K(m) in the blends, which is reasonable and suitable to predict polymer-polymer miscibility by the viscometry method.

TL;DR: In this article, the effect of cross-link density on the toughness of modified resins was investigated for modification of epoxy resins with acrylic elastomers with pendant epoxy groups.

TL;DR: In this paper, the authors used high precision density measurements to obtain the partial specific volumes of poly(dl -lactic acid) dissolved in a series of solvents characterized by different solubility parameters.

TL;DR: In this article, thermoplastic elastomers from blends of ethylene-vinyl acetate copolymer and polypropylene have been prepared by melt blending in a Brabender Plasticorder.

TL;DR: In this paper, the authors present a review of the current situation regarding those technologies which involve delivery systems in which the agrochemical is chemically bound to a polymer, and the strategy and chemistry involved in polymeric anti-fouling paints and polymeric wood preservatives are very similar to those adopted with agrochemicals.

TL;DR: In this paper, two furanic dialdehydes with aromatic, aliphatic and furanic diamines gave polymeric Schiff bases containing the heterocycle and the CHN function in each unit.

TL;DR: In this article, the melting behavior of blends of polyvinyl alcohol (PVAI) and poly(acrylic acid) (PAA) has been studied as a function of blend composition and the replacement of H-bonding interactions in pure PAA and PVAI by intermolecular interactions has been proved by analysis of the OH and C�O stretching region in the i.r. spectra.

TL;DR: In this article, the critical stress intensity factor (K 1c ) and critical strain energy release rate (G 1c ), the morphology and glass transition temperatures were examined by a three-point bending test, scanning and transmission electron microscopy and by dynamic mechanical analysis, respectively.

TL;DR: In this paper, the synthesis and applications of graft copolymers prepared from ozonized poly(vinylidene fluoride) (PVDF) are described and the mechanical properties of these products are described.

TL;DR: Sorption and desorption kinetics of water in copolymers of 2-hydroxyethyl methacrylate with ethylene glycol and oligo (ethylene glycol) dimethacrylates are reported and analyzed in terms of Fick's and Frisch's laws.

TL;DR: In this paper, the cationic polymerization of cyclohexene oxide (CHO) is initiated upon u.v. irradiation (λinc > 350 nm) of dichloromethane solutions containing N-ethoxy-2-methyl pyridinium hexafluorophosphate (EMP+PF6−) and poly(methyl phenyl silane) or poly(dimethyl diphenylsilane).

TL;DR: In this paper, a high-resolution analysis of the mechanical γ relaxation of a linear polyethylene has been carried out by means of high resolution mechanical spectrometry, which was completed by quantitative measurements of the morphological parameters governing the characteristics of the β relaxation, such as the crystallinity index and the crystalline lamellar thickness distribution.

TL;DR: In this article, the thermal and photooxidative degradation of low density polyethylene films (100 μm thick) containing nine types of titanium dioxide pigments have been studied by i.r. spectroscopy and hydroperoxide analysis, as a function of temperature; apparent activation energies have been calculated.

TL;DR: In contrast to their monomeric analogue, pyridine N-oxide dichromate, these reagents are quite stable, have easier reaction work-up and can be regenerated as mentioned in this paper.

TL;DR: In this paper, N -Phenylmaleimide (PMI)-styrene (St) alternating copolymers were used to improve the toughness of bisphenol-A diglycidyl ether epoxy resin cured with p, p ′-diaminodiphenyl sulphone (DDS).

TL;DR: In this paper, the effects of photolysis time, photosensitization, initiator concentration and the anion on the rate of polymerization in dichloromethane at 25° were investigated.

TL;DR: In this paper, the effects of toluene/heptane ratio, degree of dilution of the monomers and divinylbenzene(DVB) content on the surface formation of the copolymer beads were examined by scanning electron microscopy.

TL;DR: In this article, the copolymerization of styrene and acrylonitrile has been examined in acetonitrile and toluene and in bulk and the results indicate that the solvents behave as effective analogues of the polymers used in the bulk copolymization.

TL;DR: A series of ethylene-vinyl acetate copolymers has been examined by 13 C-NMR spectroscopy and DSC as discussed by the authors, and the melting temperature of the copolymer is a function of the average sequence length of crystallizable ethylene units, when allowance is made for vinyl acetate units and short branches.

TL;DR: In this article, a model, developed to account for the concentration dependence of the dimensions of dissolved polymers over a wide concentration range, has been combined with very simple hard sphere statistical mechanical relations to predict thermodynamic properties of the polymer solutions.

TL;DR: In this article, the pyrazole-containing ligands 2-(3,5-dimethyl-l-pyrazolyl)ethylamine and bis(3, 5-dimmethyl-l pyrazolyls)ethyl)amine have been anchored to poly(glycidyl methacrylate-co-ethylene glycol dimethacarlate), using ring opening reactions of the pendant epoxy groups with the amines (abbreviations of the modified polymers are GN6/4 and GD6/ 4, respectively).

TL;DR: In this paper, the components of the solubility parameter of some polyurethanes have been determined based on the application of three mixtures of solvents, and total parameters have been obtained.

TL;DR: In this article, real-time dielectric and rheological measurements are reported for mixtures of carboxyl-terminated butadiene acrylonitrile in epoxy resins obtained by curing either with diaminodiphelmethane at 80° or triethylenetetramine at 30° with the diglycidylether of bisphenol-A.

TL;DR: In this paper, some imino sulphonate compounds were synthesized and used as photoacid generators and their thermal stability was strongly dependent on the structure of the imino moieties.

TL;DR: In this article, phase separation of three blends of anhydride-cure bisphenol-A-type epoxy resin with phenolphthalein poly(ether ether ketone) was studied.

TL;DR: In this article, a template-based heterogeneous radical polymerization of methacrylic acid (MAA) in benzene in the presence of poly(ethylene glycol) and poly(N-vinylpyrrolidone) was studied.

TL;DR: In this article, linear copolymers of vinylamine (VA) with vinylpyrrolidone (VP) or methyl methacrylate (MMA) were used for the complexation of copper (II).

TL;DR: In this paper, a model, developed to account for the concentration dependence of the dimensions of dissolved polymers over a wide concentration range, has been combined with very simple hard sphere statistical mechanical relations to predict transport properties of polymer solutions.

TL;DR: In this article, the formation of oligomers by secondary reactions in polymer pyrolysis can be distinguished from their formation as primary products by studying the dependence of product yields and ratios on sample size.

TL;DR: In this paper, the reduced specific viscosities of the polymers decreased with increasing comonomer content, in the order Ala > leucine (Leu), phenylalanine (Phe), and lysine hydrochloride (Lys · HCl) were incorporated in nylon-6 by melt polycondensation.