Showing papers in "Polymer Testing in 2000"

TL;DR: In this paper, the morphology, rheology and ageing properties of modified bitumens were studied using fluorescence microscopy, dynamic mechanical analysis, creep test (bending beam rheometer), and gel permeation chromatography.

TL;DR: The composite P(HB-co-8%HV)/HA (30% w/w) has the highest modulus and has a mechanical strength in compression of 62 MPa, which is about the same order of magnitude of several human bones and thus it is interesting as biomaterial for use in fracture fixation.

TL;DR: In this article, aqueous dispersions based on 4,4′-dicyclohexylmethane diisocyanate (H12MDI), poly(propylene glycol) (PPG) and dimethylolpropionic acid (DMPA) were synthesized.

TL;DR: In this article, the mechanical properties, thermal behaviour and biodegradation of some polymeric materials based on polyvinyl alcohol and starch, in the presence of urea (used as a micro-organism nitrogen source/plasticizer) and glycerine (using as a plasticizer) have been studied.

TL;DR: In this paper, a polyester-based polyurethane containing silica particles in a concentration range from 1 to 20 phr were prepared from THF solutions, resulting from two different thermal treatments of precipitated silica, yielding different surface hydroxyl concentrations.

TL;DR: In this article, the results of biological tests on the fibre composites were found to be dependent on fibre treatment, i.e., acetylation exhibited superior bio-resistance followed by silane, as well as cast resin and glass fiber composites.

TL;DR: In this paper, an experimental study of gas permeability and DSC characterisation of polymers used in food packaging was conducted. And the results showed good agreement with the Arrhenius equation.

TL;DR: In this paper, kapok/cotton fabric has been used as reinforcement for conventional polypropylene and maleic anhydride grafted poly-propylene resins.

TL;DR: In this paper, the impact fracture behavior of polypropylene (PP) and polyethylene (PE) blends was investigated by means of the Charpy and drop weight plate impact tests, and the E total measured from the IDWPIT indicated PP/LDPE has the highest impact strength at both 20 and 0°C.

TL;DR: In this article, the authors determined the extent to which the water vapor transport properties of nine different polymer membranes and membrane/textile laminates are affected by temperature, and they used the Dynamic Moisture Permeation Cell (DMPC) to explore the temperature dependence of the diffusion behavior at different points on the vapor sorption isotherm of the hydrophilic polymer component.

TL;DR: In this paper, the authors used Fourier transform infrared spectroscopy (FTIR) for quantification of reacted maleic anhydride in the presence of peroxides.

TL;DR: In this paper, the effect of mixing sequences on mechanical properties of the blends were studied and the results indicated that all the blends prepared have similar ultimate tensile strength, tear strength, and hardness except the blend prepared following the fourth mixing sequence.

TL;DR: In this paper, a paper-sludge/phenolic composites were fabricated using novolac-type phenolic resin and paper sludge, and the effect of flame retardants on the mechanical properties of the composites was investigated.

TL;DR: In this article, the fracture behavior of films of a bioriented poly(ethylene terephthalate) (BOPET) that was studied by the Essential Work of Fracture (EWF) method was investigated.

TL;DR: In this article, a high-precision rotating disk apparatus (RDA) simulating external flow is designed and then applied to polymer-induced turbulent drag reduction characterization, which is able to measure the difference between the torques for a Newtonian fluid and a dilute suspension with drag reducer.

TL;DR: In this paper, the authors studied the dynamic properties, curing characteristics and swelling behavior of styrene butadiene rubber (SBR) and epoxidized natural rubber (ENR) blends and found that the incorporation of ENR 50 in the blends improved processability, stiffness, resilience and reduced the damping property.

TL;DR: In this paper, an experimental study of the effects of oscillation amplitude on the elastic storage modulus, E′, for a rigid thermoplastic measured using three point-bending is presented.

TL;DR: In this paper, paper-sludge/polypropylene composites with various kinds and contents of flame retardants like Saytex8010, TPP, Mg(OH) 2 and antimony trioxide were introduced into the composites.

TL;DR: In this article, a twin screw extruder was used to make polyacetal/thermoplastic polyurethane (TPU) blends at different TPU wt% of 90, 80, 70 and 60.

TL;DR: In this article, the dynamic mechanical properties of glass bead filled polypropylene composites have been measured over a temperature range from −150 to 100°C and at a fixed frequency of 1-Hz, by using a dynamic mechanical analyzer (DMA).

TL;DR: In this article, the effect of different polyfunctional compounds on the radiation vulcanization of EPDM rubber was investigated and the correlation between the type of antioxidant, concentration and efficiency were also investigated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).

TL;DR: In this paper, the effect of dynamic vulcanization, apparent shear rate and temperature using a twin screw capillary rheometer was studied with a special reference to the effect on the melt rheological behavior of polyvinyl chloride/epoxidized natural rubber (PVC/ENR) elastomers.

TL;DR: In this paper, the induced degradation by low energy argon ion beam and UV radiation of polyacrylonitrile (PAN) as thin discs, was investigated using IR and DC electrical conductivity.

TL;DR: In this paper, the complex elastic constants of open cell polyurethane foams are measured at low frequency (from 1 Hz to 100 Hz) using a quasi-static experimental configuration and numerical inversion method.

TL;DR: In this paper, the effect of processing variables such as temperature, shear rate, and the content of crosslinking agent on the melt torque behavior in a mixer, the degree of crosslink, the thermal properties and density of high density polyethylene (HDPE) was investigated.

TL;DR: In this article, the influence of the amount of maleated polypropylene coating of vinyl-tris (2methoxy ethoxy) silane treated wood-fibers (2 or 10 wt), type of matrix (polypropylene or male-ated poly-propylene) and composition (10, 20 or 30 wt%) on the tensile and flexural performance of composites was studied.

TL;DR: In this article, the effects of partial replacement of oil palm wood flour (OPWF) by silica and silane coupling agent on mechanical properties and curing characteristics of natural rubber compounds were investigated.

TL;DR: In this article, the effects of palm oil fatty acid and carbon black concentration on dynamic properties, curing characteristics, reversion and fatigue life in natural rubber compounds were studied, and the effect of carbon black on the dynamic properties of rubber compounds was investigated.

TL;DR: In this article, the thermal degradation of terpolymer (ABS) was studied under various gas conditions as used by the thermogravimetry analyzer, and the activation energies of thermal decomposition were evaluated by using Flynn's and Freeman's models.

TL;DR: In this article, fine convoluted rubber powder (RP) obtained from the sanding process of polishing rubber balls was used as an extender for a natural rubber compound and the cure characteristics of the extended compound were studied with the Monsanto MDR 2000 rheometer while the mechanical properties were measured in accordance with ASTM standards.