Showing papers in "European Polymer Journal in 1993"

TL;DR: In this article, a comprehensive study of the ultrasonic degradation of polystyrene solutions is presented, where the efficiency of the process with changing concentration was studied in toluene and methyl butyrate and was found to decrease at higher concentration.

TL;DR: In this paper, the effect of cross-link density on the toughening of modified resins was investigated for the modification of epoxy resins with N-phenylmaleimide-styrene alternating copolymers (PMS).

TL;DR: In this article, the reaction ratios for free-radical copolymerization of allyl methacrylate with methacrylic and allylic C-C bonds were evaluated using 1H and 13C-NMR spectroscopy.

TL;DR: In this paper, the synthesis of block copolymers of n-butyl methacrylate with methacrylic acid, using group-transfer polymerization with three protected monomers, was investigated.

TL;DR: In this paper, the kinetics of photopolymerization of glycidyl acrylate (GA) and GMA sensitized by radical and cationic initiators have been studied using a combination of photodifferential scanning calorimetry (PDSC) and Fourier Transform i.r. spectroscopy (FT-i.r.).

TL;DR: In this paper, a variety of diurethanes mostly based on at least one furanic reagent were prepared using either aliphatic, benzylic or furfurylic diols in conjunction with various monoisocyanates and alcohols.

TL;DR: In this article, stable aqueous dispersions of polyaniline (PANI) have been prepared using an underivatized poly(vinyl alcohol-coacetate) (PVAL) as a steric stabilizer.

TL;DR: In this paper, a cow liver catalase was entrapped in polyacrylamide (G1), poly(sodium acrylate) (G2), and poly(acryl-lamide-co-sodium-acrylate (G3) gels crosslinked with N, N ′-methylenebisacryamide.

TL;DR: In this paper, the mixture of poly-d (−)(3-hydroxybutyrate) (PHB)/poly(ethylene oxide) (PEO) and PHB/poly(methyl methacrylate) (PMMA) blends were studied using differential scanning calorimetry and the vapour sorption technique.

TL;DR: In this article, a novel diol was used as a monomer; benzene 1,4-di(4-imidophenoxy-nhexanol), was prepared from 6-chlorohexanol with 1, 4-di (4-IMidohydroxyphenyl) benzene.

TL;DR: In this article, the chemical modification of hydroxylic group-containing cyclo-and polyphosphazenes to introduce ethylenic and epoxide functionalities is reported, and possible practical exploitation of these new derivatives is discussed.

TL;DR: In this article, the authors investigated the polymerization behavior of dialkyl itaconates (DRI) with diisopropyl, dicyclohexyl and di-tert-butyl esters.

TL;DR: In this paper, the mechanism and site of addition of maleic anhydride to styrene-isoprene block copolymers have been investigated and conditions have been found for modification of the olefinic unsaturation up to 15-20% without crosslinking.

TL;DR: In this article, the plasticization of aqueous hydroxypropyl methylcellulose (HPMC) and polyvinyl alcohol (PVA) with poly(ethylene glycols) (PEGs) with various molecular weights and with glycerol has been investigated.

TL;DR: The rheological behavior of synthesized vinyl ester resin (VER) based on epoxy novolaks containing methyl, ethyl and butyl acrylates as reactive diluent (40% w/w) was studied using a Haake Rotovisco RV 20 viscometer.

TL;DR: In this article, a mixture of poly(ethylene terephthalate) (PET) and two different types of liquid crystalline polymers (LCP) have been prepared with different processing operations and characterized.

TL;DR: In this article, N -Phenylmaleimide-styrene alternating copolymers were used to improve the toughness of the bismaleimide resin composed of bis(4-maleimidediphenyl) methane and o, o ′-diallyl bisphenol A. The modified resins had different phase separation morphologies, depending on the copolymer molecular weight and concentration.

TL;DR: In this article, the products formed during thermal decomposition of AIBN-α-13C at 60° in benzene and dimethyl sulphoxide have been identified and quantified by 13C-NMR.

TL;DR: In this article, a novel approach to the study of the conformational behavior of water-soluble polymers is reported, based upon the generation of stabilized, room temperature phosphorescence using mobile "heavy-atom" promoters (Tl+).

TL;DR: In this article, a pyrolysis-gas-chromatographic study of polystyrene samples with sizes in the microgram range was carried out, and the dependence of the yields of all the products on sample thickness was investigated.

TL;DR: In this paper, the electrochemical n-doping processes of poly(p-phenylene-1,3,4-oxadiazole) and poly(mphenylene1, 3, 4-oxamide) in acetonitrile with LiClO4 and Bu4NClO 4 salts have been studied.

TL;DR: The presence and behaviour of free radicals in the composite lignin/polypropylene films upon heating were studied by electron spin resonance spectroscopy as mentioned in this paper, which indicated the radical character of the interaction between paramagnetic sites of the Lignin and polypropylene.

TL;DR: Chiral liquid crystalline spin molecules and their precursors have been prepared and their properties were examined in this article, where they were treated with oxidizing reagents and two types of polymers with unpaired electrons, phenoxy and amino spin polymers.

TL;DR: In this paper, the synthesis of various model compounds for the initial and post thermal oxidative fluorescence of PE and PP are described, and it is shown that the initial fluorescence is caused by the presence of α, β-unsaturated carbonyl compounds.

TL;DR: In this article, a polymer-anchored molybdenum acetylacetonate has been prepared in two steps, the first consisted of the functionalization of chloromethylated styrene-divinylbenzene copolymers to introduce acetylacetate groups.

TL;DR: In this article, a new method for the study of micellar solutions of block copolymers by gel permeation chromatography was described for the micellization in aqueous media of a poly(oxyethylene/oxypropylene/oxyethylenes) triblock copolymer (Synperonic F127) which has been well studied by other methods.

TL;DR: In this paper, four new chelating ion-exchangers have been obtained by ring-opening reaction of the epoxy groups on poly(glycidyl methacrylate-co-ethylene glycol dimethacrylated) (GMA-EDMA) and on two types of epoxy-modified silica with the primary amine group of histamine and the primary group of 4-(5-methyl-4-imidazolyl)-1-amino-3-thiabutane (memia).

TL;DR: In this paper, the initiation of polystyrene photo-oxidation has been studied and the quantum yield of initiation (ϕR·) for u.v.-irradiation at 315 K in the presence of atmospheric oxygen has been found to be 10−3.

TL;DR: A group of polymeric herbicides has been synthesized by polycondensation of reactions of 2,4-D derivatized dihydrazides either with HMDI to form polyureas or terephthaldehyde to form a poly(Schiff base)s as mentioned in this paper.

TL;DR: In this article, the binary interaction parameter was found to be −0.094 for the mixture of polyvinyl chloride, PVC, and polyethylene oxide (PEO).