Embedding low loss polymer optical fibre Bragg gratings:two different approaches

In this paper, we present two different ways to embed polymer fibre Bragg gratings (FBGs) into polymer matrices. In the first experiment, we embedded the FBG into a 3D printed polymer structure, whereas in the second experiment, the coating was polymerized around the fibre. In both cases, the response of the grating was unchanged, without any loss or distortion of the FBG signal compared with the bare fibre response. The design of the polymer coating was optimised for the measurement of a single measurand. We highlighted two possible applications: surface bend deformation monitoring and improved-sensitivity temperature sensing

Polymeric Functionalized Stationary Phase for Separation of Ionic Compounds by IC

Synthesis and properties are described of multilayered stationary phases containing quaternary amine functional groups used for the analysis of inorganic anions by ion chromatography. The bonded phases were characterized by elemental analysis, solid state 13C NMR spectroscopy and chromatographic methods. The surface of polyhydroxyethyl methacrylate (solid support) was coated with polymeric layers formed by condensation polymerization of primary amine with diepoxide. Each layer of the anion exchange stationary phase consisted of methylamine and 1,4-butanedioldiglycidyl ether copolymer. A series of stationary phases with different number of polymerized layers were tested. Separation of inorganic anions, such as F−, Cl−, NO2−, Br−, NO3−, were performed. Aqueous hydroxide, carbonate and bicarbonate solutions were used as mobile phases

Studies on the Selectivity of Porous Methacrylate Polymers

Four types of porous methacrylate polymers were synthesized as stationary phases for gas chromatography. The influence of the chemical structure of the monomers used in the synthesis on the selectivities of the resulting polymers was studied. Two procedures were applied to determine the selectivities of the copolymers: the selectivity triangle and the general selectivity. Porapak Q, the least polar commercially available porous polymer, was used as a reference phase

Effect of content and types of crosslinking monomers in copolymers containing isobutanol modified unsaturated polyester on the properties of unsaturated polyester resins

W wyniku polimeryzacji rodnikowej poliestru nienasyconego uzyskano kopolimery ze zmienną zawartością styrenu i dimetakrylanu glikolu dietylenowego jako monomerów sieciujących. Poliester nienasycony syntezowany był dwuetapowo z łatwo dostępnych surowców: bezwodnika maleinowego, glikoli etylenowego i 1,2-propylenowego oraz alkoholu izobutylowego. Zbadano wpływ monomerów sieciujących na reaktywność i lepkość nienasyconych żywic poliestrowych (NŻP) oraz scharakteryzowano właściwości mechaniczne i termiczne produktów polimeryzacji.As a result of radical polymerization of the unsaturated polyester, copolymers with variable content of styrene and diethylene glycol dimethacrylate as crosslinking monomers were obtained. The unsaturated polyester was synthesized in two steps from readily available raw materials: maleic anhydride, ethylene glycol, propylene glycol and isobutyl alcohol. The influence of crosslinking monomers on reactivity and viscosity of unsaturated polyester resins (UPR’s) was investigated. The mechanical and thermal properties of the polymerization products were characterized

New crosslinked hydrogels derivatives of 2-hydroxyethyl methacrylate: Synthesis, modifications and properties

This paper presents the synthesis, physicochemical properties and modifications of 2-hydroxyethyl methacrylate copolymers. It describes the new 2-hydroxyethyl methacrylate hydrogels in the form of microbeads of different degrees of crosslinking (2, 5, 8, 10, 15 and 20% mol). As crosslinking monomers bis[4(2-hydroxy-3-methacryloyloxypropoxy) phenyl]-sulfide and ethylene glycol dimethacrylate were used. The new hydrogels were obtained by two alternative methods in a suspension copolymerisation procedure. The copolymers were modified with diethylenetriamine in an epoxide opening reaction. Thermal properties (differential scanning calorimetry, thermogravimetric analysis) and swelling characteristic in typical solvents of the obtained functional hydrogels were examined. The chemical structure of the copolymers before and after modification was confirmed by Fourier transform infrared spectroscopy and elemental analyses. Moreover, their sorptive properties in removal of Cu(II), Zn(II), Cd(II), and Pb(II) ions from aqueous solutions were also presented. The Langmuir and Freundlich isotherm models are used to describe the adsorption characteristics of the selected modified hydrogels