Terpolymerization of carbon monoxide, styrene, and 4-methylstyrene catalyzed by palladium-rare earth catalyst

Abstract

In order to improve the thermomechanical performance of polyketone, a third monomer (4-methylstyrene) was added to the copolymerization system. The terpolymer of CO, styrene, and 4-methylstyrene was synthesized in the presence of multicomponent catalysts containing palladium acetate and rare earth metal phosphonates. The products were characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The effects of the different components, including the third monomer, palladium acetate, 2,2'-bipyridyl, rare earth phosphonate, p-toluene-sulphonic acid, and p-benzoquinone, were also studied. The highest catalytic activity of 965.51 g/(gPd·h) was obtained with a catalyst containing palladium acetate and rare earth phosphonate.

Preparation and characterization of a cation exchange membrane using a styrene-hydroxyethyl acrylate-lauryl methacrylate terpolymer

“…The reactant mixture and t-butyl peroxide (PO) as an initiator were then added to the flask with a dropping funnel over 3 h, after which the reaction was continued with stirring for 21 h. After reaction, the unreacted monomers and solvent were removed from the flask using a vacuum pump. 29,30 Preparation of Sulfonated Membranes. The membranes were prepared by crosslinking with blocked isocyanate as a crosslinking agent to improve efficiency of crosslinking reaction because of having many reaction sites compared to the other crosslinking agent.…”