the molecular weight distribution of 4 commercial isotactic polypropylene (ipp) samples was estimated using rheological data. the dynamic moduli data, obtained from rheological measurements in linear viscoelastic region was used for calculation of relaxation time spectrum, h(τ) and then shear relaxation modulus, g(t). finally, applying thimm kernel function and relaxation modulus data in genera...

Rheologically complex materials are described by function-valued properties with dependence on a timescale (linear viscoelasticity), input amplitude (nonlinear material behavior), or more generally both (nonlinear viscoelasticity). This complexity presents a difficulty when trying to utilize these material systems in engineering designs. Here, we focus on linear viscoelasticity and a methodolog...

Dynamic mechanical relaxation is a fundamental tool to understand the and physical properties of viscoelastic materials like glasses. Mechanical spectroscopy shows that high-entropy bulk metallic glass (La30Ce30Ni10Al20Co10) exhibits distinct β-relaxation feature. In present research, dynamic analysis thermal creep were performed using this material at temperature domain around β relaxation. Th...

This paper addresses two important phenomena associated with interpretation of experimental viscoelastic material property data and of direct application to composites. (1) The influences of distinct ramp loading functions and of the rise time to full load on experimental material characterizations are investigated analytically and through numerical simulations and their important contributions...

Spintronics attracts much attention because of the potential to build novel spin-based devices which are superior to nowadays charge-based microelectronic devices. Silicon, the main element of microelectronics, is promising for spin-driven applications. Understanding the details of the spin propagation in silicon structures is a key for building novel spin-based nanoelectronic devices. We inves...