recently, the demands for the production of many different types of plastic wastes are greatly growing that subsequently, lead to the serious challenges in environmental considerations. since, these materials are rarely resolved by microorganisms, hence, their recycling to the useful materials is crucial. in the present study, we used a solution electrospinning technique to synthesize nano/micr...

this paper discusses about preparation of biodegradable polymer /clay nanocomposites based on organically modified montmorillonite clay; i.e. cloisite 10a and biodegradable polymer chitosan by solution mixing technique and their characterization. the nanocomposites were successfully prepared and their structures were characterized by powder x-ray diffraction (xrd), particle size analyzer (beckm...

Abstract Fracture of materials with rate-dependent mechanical behaviour, e.g. polymers, is a highly complex process. For an adequate modelling, the coupling between stiffness, dissipative mechanisms present in bulk material and crack driving force has to be accounted for appropriate manner. In addition, resistance against propagation can depend on rate deformation. this contribution, energetic ...

Fused deposition modelling is the most popular method of 3D printing with a variety polymers, but raw materials are commonly in filament form. Research has demonstrated ability to use pellets for this process, which easier produce than filaments. Apart from savings on pre-processing, approach also combines good attributes both injection moulding and referred as extrusion printing. Direct especi...

I read with interest the case report (Spielberg and van Denbrink, Eur Respir J., 1, 471-472) from Davos on a patient with brittle asthma treated with a continuous infusion of theophylline. I was surprised to see that our paper on the treatment of brittle asthma with continuous subcutaneous infusions of terbutaline was not referred to [1]. Since that preliminary study which showed excellent cont...

Three principal methods used to study stresses in materials are photoelastic stress analysis, brittle lacquer-coating techniques, and electronic strain gauges. A number of studies have been conducted using models and the photoelastic method' to examine stress patterns in oneand two-surface inlays, complete dentures, teeth and supporting bone, and rests used in partial dentures. Strain gauges4 9...

This paper investigates the effect of crystallographic orientation on the mode of material removal (ductile vs. brittle) in diamond scribing of single crystal silicon (c-Si) and offers an explanation for the observed effects in terms of the combined role of phase transformation and slip generation. Single-point diamond scribing tests are performed on (111), (001) and (110) crystallographic plan...