Chemical structure of fibers of ultra-high-molecular-weight polyethylene upon ion-beam treatment and post-irradiation grafting of acrylic monomers

Surface modification of ultra-high molecular weight polyethylene fiber by different kinds of SiO2nanoparticles

“…Two distinct diffraction peaks of all the samples at 2θ = 21.36° and 23.74° corresponded to (110) and (200) planes of the polyethylene orthogonal crystal system, respectively. A small peak at 2θ = 19.34° was (010) plane, which may be attributed to a small amount of a triclinic modification of the crystal lattice . However, the diffraction peak of (010) was so weak that did not cause any change of crystalline structure.…”

“…Figure 5 showed X-ray diffraction patterns of asreceived and modified UHMWPE fibers. Two distinct diffraction peaks of all the samples at 2h small peak at 2h 5 19.348 was (010) plane, which may be attributed to a small amount of a triclinic modification of the crystal lattice [5,21,22]. However, the diffraction peak of (010) was so weak that did not cause any change of crystalline structure.…”

Interfacial evaluation of epoxy/carbon nanofiber nanocomposite reinforced with glycidyl methacrylate treated UHMWPE fiber

“…They declared that the active groups grafted on to the fiber surface would supply enough anchor points for the chemical bonding and interaction with various resins or further reactions. According to the results obtained by Yakusheva et al ., grafting of acrylic monomers on the UHMWPE fiber surface improved interfacial adhesion, resulting in a better fiber–matrix stress transfer. Wang et al .…”

Radiation-induced oxidation of ultra-high molecular weight polyethylene (UHMWPE) powder by gamma rays and electron beams: A clear dependence of dose rate

“…The contact angle decreased by 15°u nder γ irradiation at a dose of 300 kGy, which indicates the improvement in surface wettability of UHMWPE was limited even at a high dose. A significant decrease in contact angle can be achieved by radiation grafting of acrylic acid onto the surface of the UHMWPE powder (Yakusheva et al, 2010).…”

“…Furthermore, in the presence of oxygen, oxidation is a significant effect (Archodoulaki et al, 2011;Jahan and Durant, 2005;Kamweru et al, 2012;Medel et al, 2005;Mehmood et al, 2013;Oral et al, 2006). The reaction of radiation-induced free radicals with oxygen will generate many oxidation products, such as ether, ester and carbonyl groups (Elzubair et al, 2003;Kasser et al, 2010;Takaoka et al, 2007;Turos et al, 2009;Yakusheva et al, 2010). These generated hydrophilic and polar groups on the surface could change the UHMWPE surface's chemical structure or wettability because the surface wettability of a polymer primarily depends on the amount of hydrophilic groups (Ravanbakhsh et al, 2010).…”