Showing papers in "European Polymer Journal in 1984"

TL;DR: In this paper, a tracer (tritium) method was used to establish the chemisorption isotherm of stearic acid on a CaCO3 filler and the induced changes in surface properties have been studied.

TL;DR: The phase transition of water bound in polyvinyl alcohol (PVA) hydrogel was measured by differential scanning calorimetry as discussed by the authors, and it was found that water in PVA gel can be classified into at least three groups; ca. 1.5 mol non-freezing water, 5−6 mol freezing bound water, and the rest free water, corresponding to each hydroxyl group of PVA.

TL;DR: The N -sodiocaprolactam-catalysed anionic polymerization of e -caprolactams is activated by e -Caprolactone which itself acts as a comonomer, yielding copolyesteramides.

TL;DR: In this article, the compatibility of various PVC blends with chlororubber-20 and its graft polyblends have been studied on the basis of their previous findings and the behavior of these blends at the molecular level is reflected in the changes of ultrasonic velocity and absolute viscosity with composition.

TL;DR: In this article, aqueous solutions of acrylamide were dispersed with non-ionic surfactants within isoparafinic hydrocarbons to particles of approx. 1 μm and polymerized in a batch reactor by water-soluble and oil-ssoluble azo-initiators at 42 to 57°C.

TL;DR: In this article, the authors studied the transition between structural modifications of isotactic polypropylene, characterized by increasing degrees of order in respect to the up and down positioning of the chains, for samples having different previous thermomechanical histories or containing small amounts of ethylenic units.

TL;DR: In this article, simultaneous thermal analysis (STA) and flammability measurements of polypropylene were used to investigate the role of an additive on oxygen uptake and char formation.

TL;DR: In this article, the mechanisms of thermal and photo-oxidative degradation of unstabilized samples of ABS have been discussed in terms of the known chemistry of the unsaturated isomeric units of PB and the chemical species identified by either i.r. spectroscopy or chemical studies.

TL;DR: In this paper, structural properties of LDPE samples were investigated for various periods both in the absence and the presence of a light stabilizer system, taking into account previous structural results for the same samples.

TL;DR: In this article, the authors investigated the photo-stability of ABS and concluded that the degradation characteristics of ABS are essentially those of the polybutadiene component, and that the insolubility of degraded samples of ABS is associated with the formation of cross-linked structures and occurs mainly in the PB segment.

TL;DR: In this paper, the dynamic structure of micelles formed by a polystyrene-b-poly(ethylene/propylene) block copolymer in paraffinic solvents has been studied by electron microscopy, photon correlation spectroscopy and 1H and 13C-nuclear magnetic resonance.

TL;DR: In this paper, van Luyen and Strzelecki described the transesterification procedure of 4′-acetoxyphenyl-4-acetoxybenzoate and dibasic acids having 6-12 methylene units.

TL;DR: The mechanism of light-induced degradation of solid polyvinyl chloride (PVC) has been investigated, and an overall reaction scheme has been developed, based on values of the quantum yields for the primary photoproducts as discussed by the authors.

TL;DR: In this article, the authors investigated the structure of copolyesteramides formed by anionic ring-opening copolymerisation of e-caprolactam with e-Caprolactone and proposed a mechanism to explain the formation of the multiblock structures.

TL;DR: The crystalline character of anionic copolymers of e-caprolactam with e-Caprolactone and of some alternatingly-sequenced analogues has been studied and investigations made of the mechanical and dynamic mechanical properties of the anioniccopolymers.

TL;DR: In this article, the reaction of monofunctional oligoisobutylene with maleic anhydride is described, and the double bond of the resulting olefin can be endo or exo.

TL;DR: In this paper, copolymers have been synthesised by processing polyethylene/polystyrene (PE/PS) and polyethylenes/poly(vinylchloride)(PE/PVC) blends in an internal mixer in the presence of radical generators.

TL;DR: In this article, the structure of the bisphenolic components on the breadth of the mesomorphic interval has been indicated, characterized by the presence along the polymer chain of azomethine groups between aromatic rings and linear flexible spacers based on sebacic acid.

TL;DR: In this article, the authors showed that polyester micro-single crystals, grown from nitrobenzene-hexane or nitrogen-decane solutions, exist in three crystal structures.

TL;DR: Anionic copolymerisation of ω-laurolactam with e-caprolactone yields copolyesteramides with NH(CH 2 ) 11 CO and O( CH 2 ) 5 CO unit contents similar to those in the feeds as mentioned in this paper.

TL;DR: In this article, the authors propose a variation lineaire de R p avec l'intensite lumineuse implique l'intervention d'un mecanisme de polymerisation base sur des reactions de terminaison monomoleculaires.

TL;DR: In this paper, the thermal degradation at subvolatilisation temperatures of polystyrenes prepared with the radical initiators benzoyl peroxide and azoisobutyronitrile was studied.

TL;DR: In this paper, the linear and non-linear viscoelastic properties of compatible polymer blends (polystyrene/tetramethylpolycarbonate) have been studied in the temperature range 180-280°.

TL;DR: In this paper, the relationship between the molecular properties, the total degree of substitution and the degree of solvation for cellulose acetate (CA) was analyzed, and the strength of the solvation was estimated from the chemical shift of O-acetyl-and hydroxyl-protons in NMR spectra.

TL;DR: In this article, the flame-retardant and smoke-suppressant activity of red phosphorus, in the presence of a brominated (decabromobiphenyl) and/or a nitrogenated (melamine) compound, on acrylonitrile-butadiene-styrene terpolymer was investigated.

TL;DR: In this article, the effects of combinations of stearates, palmitates, and laurates respectively of zinc and calcium, in various proportions, on the thermal stability of PVC were studied.

TL;DR: In this paper, it has been shown that poly(6GT) form I has the same fully extended conformation as its related model compound hexamethylene glycol dibenzoate.

TL;DR: In this article, copolymers of benzyl methacrylate with cyclohexylmethyl methacylate were synthesized and the reactivity ratios of the monomers were established.

TL;DR: In this article, the authors compared the conformational constraints imposed by the TiCl3 surface on the growing chain and showed that sites on edges of lateral surfaces parallel or nearly parallel to the c axis may not be suitable for the coordination of long alkyl chains, while sites at less hindered sites, such as edges of inclined lateral surfaces or reliefs, do not involve any increase of repulsive interactions for an isobutyl group.

TL;DR: In this paper, the viscosities of polystyrene in toluene were measured for concentrations up to 400 kg m−3 at 298 K. It is observed that viscosity of the polymer solution increases with increasing concentration and molecular weight; the rate of increase is greater at higher values of the two parameters.