Analysis of Poly(2-Hydroxyethyl~Methacrylate)-co- Poly(4-Vinyl Pyridine) Copolymers [COP2,4] Irradiated: an EPR study

Abstract

Poly(2-hydroxyethyl methacrylate)-co-poly(4-vinyl pyridine) and poly(HEMA)-co-poly-(4-VP) copolymers were synthesized by free radical polymerization. K2S2O8 was used as an initiator. Chain lengths of the copolymer was changed by varying the monomer/initiator ratio. These polymers have molarites of 2.6 and 2.1 respectively and are called COP2 and COP4. The samples were exposed to gamma rays at room temperature. After irradiation, the EPR spectra of COP2 and COP4 were recorded between 120 K and 450 K. From the temperature dependence of the line intensity, it was concluded that unpaired spin concentration in the irradiated samples has been changing with temperature. A theoretical study, presented in this report, was aimed to test success of the machine learning methods and to select the best learning method.

Investigation of Wear Strength of Blast Furnace Slag Blended Polymer Materials

“…By preventing the rapid consumption of limited natural resources, these by-products will also provide the production of more inexpensive materials of higher quality than the traditional ones [1][2][3][4][5].…”

Characterization of UHWPE-TiO2 Composites Produced by Gelation/Crystallization Method

“…Polymer structures are attractive due to their mechanical, optical, electrical and biomedical properties [1]. Among them ultra high molecular weight polyethylene (UHMWPE) is widely used in orthopedic implants, like hip joint replacement prostheses, because of its excellent characteristics, such as high wear and abrasion resistance, chemical inertness and biocompatibility [2][3][4][5].…”

Comparative Study of Influences of Gamma Rays on Calix[4]Arene and 25,27-di(4-Nitrobenzyl)-26,28-Dihydroxycalix[4]Arene: EPR Study

“…Therefore, it is important to identify radical structures produced by irradiation. EPR is a powerful spectroscopic method for detecting radicals in the materials [7][8][9][10][11][12][13][14][15][16][17][18]. In this study, Calix [4]arene, labeled calix [4]arene (1), and 25,27-di(4-nitrobenzyl)-26,28-dihydroxycalix [4]arene, labeled calix [4]arene(2), were exposed to gamma rays and then radical structures of these calix [4]arenes were evaluated by EPR method.…”