Showing papers in "Polymer in 1985"

TL;DR: In this paper, the effects of rubber particle size and rubber-matrix adhesion on notched impact toughness of nylon-rubber blends are analyzed. And the general condition for toughening is that the interparticle distance must be smaller than the critical value.

TL;DR: A comprehensive review of relaxation processes in semi-crystalline polymers is presented in this paper, with emphasis placed on phase origin, phase properties and the effects of the interactions between the crystal and amorphous phases.

TL;DR: In this paper, the basic morphology of melt-crystallized isotactic polypropylene (iPP) was investigated using both optical and electron microscopy, and specific correlations were obtained between the structural entities on all scales of the structure hierarchy.

TL;DR: In this article, the experimental facts concerning relaxation processes in semi-crystalline polymers have been reviewed and progress in interpretation of the molecular processes underlying the relaxations is considered.

TL;DR: In this paper, the results of a Fourier transform infrared study of poly(vinyl phenol) (PVPh) blends containing a number of chemically and structurally dissimilar polymers are presented.

TL;DR: In this article, an outline of the characteristics of PEEK and the versatility of its compositional forms (micro and macro composites) are given to illustrate its wide potential for success in engineering applications.

TL;DR: In this paper, a mixture of a liquid crystalline thermotropic polymer (LCP) and an amorphous polyamide (PA) was prepared by melt blending and the two phase morphology was found to change gradually with increasing LCP content from ellipsoidal particles to rod-like and fibrillar structure.

TL;DR: Differential scanning calorimetry (d.s.c.) was used to investigate the thermal behavior of cyclic and linear poly(dimethylsiloxanes) over the temperature range 103-298 K as mentioned in this paper.

TL;DR: In this paper, the phase separation phenomena in ternary solutions of polysulfone (PSf) in mixtures of a solvent and a nonsolvent (N,N-dimethylacetamide (DMAc) and water, in most cases) are investigated.

TL;DR: In this paper, the growth rates of spherulites were measured in poly(p-phenylene sulphide) crystallized from the melt and the quenched glass over the temperature range 100°C-280°C, possibly the most extensive overall range yet reported for any polymer and, as such, most propitious for study of regime III crystallization.

TL;DR: In this paper, a general technique to produce low-density, microcellular, polymeric foams with organic-soluble polymers, in particular polystyrene, is described.

TL;DR: A review of the dielectric loss spectra of polymers at microwave frequencies has been carried out in this paper, where a large volume of data for low loss polymers (polyethylene, polypropylene and poly(tetrafluoroethylene)), which are used in the communications industry, was available for review.

TL;DR: In this paper, the effect of the degree of crosslinking of glassy polymers on the transport mechanism of penetrants was investigated using a series of divinyl benzene (DVB)-crosslinked polystyrenes of nominal crosslink ratio X from 0001 38 to 0060 mol DVB/mol styrene.

TL;DR: In this article, it was shown that heat absorbed in the heating process of water in polyvinyl alcohol membranes is higher than that evolved in the cooling process, and a remarkable discrepancy was found between these heats when the water retention, H, of the membrane is lower than 0.5 g H 2 O/g swollen membrane.

TL;DR: In this article, a model was proposed for the microstructure of ionomers which attributes the small-angle X-ray scattering (SAXS) peak observed in these materials to interparticle interference between small ionic domains arranged in the hydrocarbon matrix with a liquid-like degree of order.

TL;DR: In this article, gas-phase reactions have been used to tag corona-discharge-induced chemical species on the surface of polyethylene to provide a surface count of induced species.

TL;DR: Physical ageing rates of poly(aryl-ether,ether-ketone) have been measured and interpreted as a kinetic effect associated with the glass formation process as discussed by the authors, and the extent of ageing achieved at equilibrium as measured by differential scanning calorimetry is equal to the product of the super-cooling from the quenched glass transition, and the heat capacity difference between the glass and liquid at the transition temperature.

TL;DR: In this paper, the second virial coefficient (A2) of five samples of poly(ether-ether-ketone) (PEEK) by light scattering (LS) in concentrated sulphuric acid was determined.

TL;DR: In this article, the elastic extension of an oriented and crystalline fiber built up of rigid-rod chains is analyzed and a formula for the stress-strain curve is derived.

TL;DR: In this article, the authors investigated the lamellar morphology of melt-crystallized isotactic polystyrene and found that hexagonal lamellae splay apart about a common diagonal presenting three characteristic projections in orthogonal directions.

TL;DR: In this article, side chain polysiloxane polymer liquid crystals have been used to demonstrate high-resolution laser writing on thin (∼20 μm) polymer films, depending on the pulse energies (typically

TL;DR: In this paper, a transient spectrum with a maximum at about 330 nm detected at the end of a flash was ascribed to the diphenyl phosphonyl radical (Ph 2 P = 0 ).

TL;DR: A comprehensive survey on synthesis, chemical and physico-chemical properties, and applications in several fields, including the biomedical field, of a family of tertiary amino polymers, the poly(amido-amine)s, is provided in this paper.

TL;DR: In this article, the properties, surface composition, and blood compatibility of segmented poly(urethaneureas) (SPUU's) with various soft segment components were investigated, and the microphase separated structure between hard and soft segments improved with an increase in molecular weight (Mn) of polyether diol in soft segment.

TL;DR: In this article, a polyvinyl alcohol is crosslinked in dilute solution with glutaraldehyde and the reaction product is characterized by viscometry and gel permeation chromatography (g.p.c.).

TL;DR: In this article, the effects of electron beam irradiation on ten kinds of polymers containing various aromatic rings linked by functional groups in the main chain (aromatic polymer) were studied with reference to change in tensile properties.

TL;DR: In this article, the distribution of oxidative degradation in isotactic polypropylene has been monitored using ultra-violet microscopy, and it is shown that oxidation initially favours the atactic fraction of the polymer.

TL;DR: In this article, the thermal properties of hot-cast gelatin films, obtained from hake skin, were studied using differential scanning calorimetry (d.s.c.) and thermal mechanical analysis (t.m.a.).

TL;DR: In this article, the changes of pH levels and tensile breaking strength of two synthetic biodegradable polymers, polyglycolic acid and poly(glycolide-lactide) were examined as a function of time of immersion and γ irradiation in in vitro conditions.