Formation of various types of intergranular bond during the compaction of ultra-high-molecular-weight polyethylene reactor powders

The structural evolution of high-density polyethylene during crazing in liquid medium

“…Previously, these ideas were based on an increase in the volume of a polymer sample and the emergence of a structure permeable to liquids after the deformation of semicrystalline polymers in liquid medium, as well as on SAXS data [20,50]. Fig.…”

The effect of high dose of gamma-irradiation on residual radicals concentration in ultra-high molecular weight polyethylene (UHMWPE) in the presence of vitamin E

“…Ultra high molecular weight polyethylene (UHMWPE) is widely used in the applications where enhanced mechanical and physical characteristics are required as compared to conventional Polyethylene (PE) [1]. Free radicals generated by radiation steril ization and/or cross linking are believed to be precur sors to oxidation of (UHMWPE) via their decay in air through oxidative reaction.…”

“…Also, this blend i.e. "α T UHMWPE polymer powder" before 1 The article is published in the original. consolidation provides a better mean for investigation of free radical reactions because of larger exposed sur face area to the environment [3].…”

Optimization of hot drawing process of ultra‐high molecular weight polyethylene monofilament prepared by melt spinning

“…When the draw ratio reached 36, the monofilament crystallinity increased slightly and the grain size reduced little while the monofilament strength grew rapidly, due to the transformation of the shish‐kebab structure into the extended chain crystals. The stronger tensile stress aided the melt‐recrystallization of folded molecular chains by stress‐induced in the shish‐kebab, and the formation of extended chain crystals significantly reduces the defects in monofilaments 56 . The shish‐kebab structure was not completely transformed into the extended chain crystal structure when the draw ratio reached 56, the crystallinity increased, and the grain size continued to decrease, but Figure 5f shows that the microfibers of the monofilament had fractured, indicating that the existing extended chain crystal inside the monofilament had reached its limit and slipped and fractured, and these internal defects caused a significant decrease in the tensile strength of the monofilament.…”