Abstract Epoxies as a thermoset polymer have got great attention in different applications. To elaborate their employing and surmount brittleness, many polymers were blended with them. The results confirm that the good mechanical properties are obtained when 6wt% of Polysulfide Rubber (PSR) is epoxy reinforced fiber glass. effect rubber glass on viscoelastic investigated using creep-recovery da...

A rubbery material can undergo elastic deformation under stress and return to its original shape upon removal of the deforming force. This behavior of elastic deformation and recovery is known as rubbery elasticity or viscoelasticity, and gives rise to rubbery materials for various applications, ranging from household (rubber bands and balloons, gloves, pencil erasers, shoe soles, carpets) to i...

Waste latex sludge from centrifuged residue, which is a null by-product of concentrated latex manufacturing, was digested to retrieve the rubber by using sulfuric acid. It was found that the acid concentration and digestion time have an effect on the amount and purity of the retrieved rubber. Sulfuric acid at concentrations of more than 10% by weight with a digestion time of 48 hours completely...

Sedimentation in reservoirs lowers the quality of consumed water, reduce the volume of reservoir, lowers the controllable amount of flood, increases the risk of water overflow during possible floods and the risk of reversal and reduction of dam's useful life. So in all stages of dam establishment such as cognitive studies, phase-1 studies of design, control, construction and maintenance, the pr...

in this study an empirical model which can be used to predict the rutting parameter (g*/sinδ) for neat and powder rubber modified bitumen describes. the model was developed using 36 unique powder rubber modified bitumen combinations, rubber concentrations were varied at 5% intervals between 5 and 20%. the effects of powder rubber particle size on model accuracy were also studied ultimately a mo...

In this study, a chemical dissolution treatment was used to recover rubber and carbon black (CB) from truck tire scrap, with gas oil acting as the solvent 4-Hydroxy-TEMPO catalyst for reactions. Montmorillonite clay separate solution CB other non-dissolved additives. The recovered were characterized together original scrap sample by XRD, SEM, BET thermal analysis, well FTIR 1H NMR spectral anal...

on palpation a hard mass could be felt near the anterior end of the urethra. Urethral obstruction was confirmed by failure to pass a fine rubber catheter further than the obstructing mass. The child was lightly ansesthesized and the obstructing body worked forward to the meatus by external manipulation. The meatus was incised sufficiently to expose the point of the obstruction which was then re...

Constitutive equations are derived for the time-dependent behavior of particlereinforced elastomers at isothermal loading with finite strains. A rubbery polymer is modelled as a network of macromolecules bridged by junctions which can slip with respect to the bulk material under straining. A filled elastomer is thought of as an ensemble of meso-regions where sliding occurs with different rates....