a novel mixing approach for achieving a good dispersion of multi-walled carbon nanotubes (mwcnts) in ethylene- propylene diene monomer (epdm) matrix has been investigated. in this approach epdm was modified with vinyltrimethoxysilane (vtms) during melt mixing. in addition the effect of mwcnt concentration on mechanical and rheological properties of modified epdm has been studied. the formulated...

The fuel resistance property plays an important role in asphalts, but available standards for determining this characteristic are presently lacking. In the present work, a number of polymer modified bitumen with styrene-butadiene-styrene (SBS) polymer (4, 5, 6% SBS) and SBS/ sulfur modified bitumen with various percentages of sulfur (1.65, 3, 3.5% based on polymer content) were prepared. Each s...

in this study, three varieties of rice including tarom, anbarbo and hashemi were selected and their heavy metals content were analyzed. subcritical water was used to provide rice bran extract at temperatures 100 and 120 ° c. in order to provide grape juice treatments, we used 5, 10, 15 and 20 % of extract in the formulation of red grape drink. samples which had packed and pasteurized, kept in t...

The present work explores the characteristic rheological behaviors of polystyrene (PS) and poly(methyl methacrylate) (PMMA) melts in startup shear. Through a detailed analysis stress overshoot, unexpected non-universal features are observed as follows. For all examined melts, with increasing shear rate, peak increases time decreases. exhibit power-law relation, for which scaling exponent is −1/...

8 ABSTRACT: In situ characterization of minute amounts of fluids that rapidly change 9 their rheological properties is a challenge. In this paper, the rheological properties of 10 fluids were evaluated by examining the behavior of magnetic nanorods in a rotating 11 magnetic field. We proposed a theory describing the rotation of a magnetic nanorod in 12 a fluid when its viscosity increases with ...

In situ characterization of minute amounts of fluids that rapidly change their rheological properties is a challenge. In this paper, the rheological properties of fluids were evaluated by examining the behavior of magnetic nanorods in a rotating magnetic field. We proposed a theory describing the rotation of a magnetic nanorod in a fluid when its viscosity increases with time exponentially fast...

Concrete is a versatile construction material used along with reinforcement. made up of binder materials and aggregates. Cement primary to produce conventional concrete. Carbon dioxide emissions in the atmosphere are symptom issue related Portland cement manufacture. It estimated that one ton produced releases an equal amount CO2 into atmosphere. On other hand, many industrial wastes dumped ope...

Galactomannan extracted from seeds of Cassia grandis with 0.1M NaCl, followed by ethanol precipitation, presented a yield of 36 ± 8%. The polysaccharide has a constant mannose/galactose ratio (2.44:1). Methylation analysis, one and two dimensional NMR spectroscopy confirmed that the polysaccharide has a central core composed of 4-linked β-mannose units, with branches of galactose, linked to the...