Analysis of structure and properties of DVB–GMA based porous polymers

Abstract

Polar porous polymeric microspheres divinylbenzene-glycidyl methacrylate (DVB-GMA) were synthesized with a suspension method. Two kinds of polymers differing in chemical composition and physical properties were obtained. The molar ratios of monomers in the polymers were 50:50 and 75:25, respectively. Next, the prepared materials were chemically treated with phosphoric or sulphuric acid in order to additionally modify their surface. Consequently, the polymers gained acidic character and cation exchange properties. The prepared materials were characterized by: elemental analysis, ATR-FTIR, DSC, low temperature nitrogen sorption and SPE experiments. CHN and ATR-FTIR confirmed the chemical structures of the polymers. The DSC analyses revealed their network was highly cross-linked. Porous structure parameters of the studied materials strongly depended on their chemical composition. All the materials were mesoporous with bimodal pore size distribution (3.7 nm and 5.5-7.5 nm). Highly cross-linked DVB-GMA 75:25 and its acidic derivatives had twice higher specific surface areas (320-370 m 2 /g) than their less cross-linked counterparts DVB-GMA 50:50 (140-190 m 2 /g). The prepared materials were tested for the sorption of phenolic compounds (phenol, 2-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol) and popular pharmaceuticals-aspirin, paracetamol and ibuprofen. The process of dynamic sorption of phenols depended on both porous structure and surface chemistry of the polymers. And the less polar character of the polymeric surface was balanced by its higher porosity to maintain the sorption ability on the same level. In case of pharmaceuticals dependence of sorption properties on porosity and/or surface chemistry was more diversified and additionally chemical nature of adsorbate had to be taken into account.

Regular Polymeric Microspheres with Highly Developed Internal Structure and Remarkable Thermal Stability

“…An analogical reaction of a diacrylate derivative of 4,4′-sulfanediyldiphenol gives a copolymer with an area equal to 103 m 2 /g [ 44 ]. In an equimolar reaction with DVB, 2,3-epoxypropyl methacrylate, an important polar monomer used in numerous syntheses, gives a product with a specific surface area of 143 m 2 /g [ 45 ]. For porous polymeric microspheres, it is also important that the porous structure be formed by pores of appropriate diameters.…”

Porous Polymers Based on 9,10-Bis(methacryloyloxymethyl)anthracene—Towards Synthesis and Characterization

“…These highly cross-linked, three-dimensional networks possess superior inherent porosity, excellent stability, pre-designable and tunable structures. They are a broad class of advanced materials that have gained remarkable attention [ 46 , 47 , 48 , 49 , 50 ]. Porous polymers are mainly obtained during the radical copolymerization with cross-linking with the presence of diluents.…”

Influence of Benzoyl Peroxide and Divinylbenzene Concentrations on the Properties of Poly(glycidyl methacrylate‐co‐divinylbenzene) Magnetic Microspheres

“…They can react with various compounds that have functional groups such as amines [12,13] and hydroxyls. [1,14] There are several works describing magnetic polymeric resins based on glycidyl methacrylate (P(GMA)-M). [15][16][17][18] Among the techniques used to obtain them, suspension polymerization stands out.…”

“…They can react with various compounds that have functional groups such as amines [ 12,13 ] and hydroxyls. [ 1,14 ]…”