Highly swellable glycidyl methacrylate terpolymers with styrene and a series of crosslinkers (divinyl benzene and ethylene, diethylene, and triethylene glycol dimethacrylates) were obtained by suspension polymerization. The loading capacities of the resins, their glass-transition temperatures, and their swelling characteristics in 20 solvents were examined with respect to the monomer composition. A selected resin was modified for a cobalt-imine complex and tested as a catalyst in a model ring-opening reaction.
2-Hydroxyethyl methacrylate copolymers with styrene and series of the cross-linkers (divinylbenzene and mono-, di-and triethylene glycol dimethacrylates) with low cross-linking degree (2-5 mol %) were obtained by suspension polymerization. Loading capacity of the resins, their glass transition temperature, and swelling characteristics in 20 solvents were analyzed depending on monomers composition.
Cyclohexyldiamine-modified glycidyl methacrylate polymer (GMA-CHDA) in the form of geltype beads was used to encapsulate Pd(0) nanoparticles 4-15 nm in diameter and applied as a new, reusable catalyst for the Suzuki-Miyaura cross-coupling reaction of 2-and 4-bromotoluene with phenylboronic acid. It was found that the precatalyst preparation methodology strongly influenced its catalytic activity. The best results (100% yield of the product) were obtained when GMA-CHDA was first treated with hydrazine (reducing agent for Pd(II)) and next with PdCl 2 solution. The new catalyst acts heterogeneously, and the post-reaction solution after catalyst separation is not catalytically active, suggesting that there is no leaching.
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