Changes in molecular structure of ultra‐high molecular weight polyethylene hostalen GUR upon ageing of its solutions at elevated temperature

Abstract

Changes in solutions of ultra-high molecular weight polyethylene Hostalen GUR in I ,2,4-trichlorobenzene with time were studied by means of viscometry and light scattering. The decrease of viscosity during ageing indicates that both the degradation of polyethylene chains and destroying of aggregates may occur. The former fact makes questionable the ultra-high molecular weight character of the sample.

Dispersion‐Polymerized Carbon Nanotube/Poly(methyl methacrylate) Composite Particles and their Electrorheological Characteristics

“…[7,8] ER fluids change from a liquid-like to solid-like phase when an electric field is applied, due to the interaction among the particles. [9][10][11][12][13][14][15] These unique properties allow ER fluids to be utilized for a variety of electromechanical devices, such as robotic arms and shock absorbers. [10] Various polymeric particles have been used as ER materials, including many conducting polymers, such as polyaniline (PANI), [11] polypyrrole, [16] poly( p-phenylene) [17] and PANI derivatives, e.g., PANI nanoparticles, [18] PANI composite micro-beads [19] and PANI core-shell structures.…”

Electrorheological characteristics of solvent‐cast polypyrrole/clay nanocomposite

“…[1][2][3] The dipole-dipole interactions among the particles lead to fibril structures via a chain formation and alignment of particles along the applied electric field direction with strings of particle orientation. [4][5][6] These fibrillar particle structures result in the dielectric constant mismatch between the particles and the insulating oil.…”

Electrorheological characteristics of conducting polypyrrole/swollen MCM-41 nanocomposite

“…Various semi-conducting polymers and their composites such as polyaniline [5], copolyanilines [6], polypyrrole [7,8] and polymer/inorganic hybrids [9] with either clay or mesoporous material have been employed as dispersing phases in the ER fluids. In addition, polymeric particles possessing polar groups such as amino and carboxy groups have been also explored [10].…”