New Kind of Polymer Materials Based on Selected Complexing Star-Shaped Polyethers

Abstract

In today’s analytical trends, there is an ever-increasing importance of polymeric materials for low molecular weight compounds including amines and drugs because they can act as carriers or capture amines or drugs. The use of this type of materials will allow the development of modern materials for the chromatographic column beds and the substrates of selective sensors. Moreover, these kinds of materials could be used as a drug carrier. Therefore, the aim of this study is presenting the synthesis and complexing properties of star-shaped oxiranes as a new sensor for the selective complexation of low molecular weight compounds. Propylene oxide and selected oxirane monomers with carbazolyl in the substituent were selected as the monomers in this case and tetrahydrofuran as its solvent. The obtained polymer structures were characterized using the MALDI-TOF. It was found that in the initiation step potassium hydride deprotonates the monomer molecule and takes also part in the nucleophilic substitution. The resulting polymeric material preferably cross-linked with selected di-oxiranes (1,2,7,8-diepoksyoktan in respect ratio 3:1 according to active center) was then used as a stationary phase in the column and thin layer chromatography for amine separation and identification. Sorption ability of the resulting deposits was determined using a quartz microbalance (QCMB). The study was carried out in stationary mode and flow cells to simulate actual operating phase conditions. Based on changes in electrode vibration frequency, the maximum amount of adsorbed analyte and the best conditions for its sorption were determined.

Novel Organic Material Induced by Electron Beam Irradiation for Medical Application

“…PTFE is also one of the best polymers available on the market for tribological applications. Due to its structure (extended-chain linear molecules, -(CF 2 -CF 2 ) n -), it can transfer a thin sliding film onto surfaces interacting during friction, significantly reducing the friction coefficient [8][9][10][11]. However, because contaminants in the form of lamellae, nodules, and slabs of polymer, with dimensions of several tenths of a millimeter, are also transferred during the tribological interaction of pure PTFE, PTFE without any additives is characterized by a very high wear rate [8].…”

Production of Electrolytic Composite Powder by Nickel Plating of Shredded Polyurethane Foam

“…The first stage of polyurethane preparation was to obtain the base polyol ( Figure 1 ). Poly(DPU) was obtained according to patent number PL 228980 [ 42 ], and polyol used for polyurethane synthesis was characterized in the article by Swinarew et al [ 43 ]. The resulting polymeric material is in the form of a light foam ( Figure 2 A).…”