Emulsion Copolymerization of 1-Olefins with Carbon Monoxide

Three types of palladium complexes with hydroxyalkyl, phosphonate and amine substituents attached to the phosphorus donors were employed in the emulsion copolymerization of propene/CO, butene/CO, and propene/butene/CO. Depending on the chain-length of the phosphorus attached substituents in the catalysts, four variables for the propene/CO, butene/CO, and propene/butene/CO copolymers were controlled: (i) the regioregularity; (ii) the molecular weight, and (iii) the glass transition temperature and the melting point (Tg and Tm). Stable dispersions are obtained by introduction of undecenoic acid as a third or fourth monomer into the propene/CO, butene/CO, and propene/butene/CO copolymers and no phase separation, or the formation of a coagulum within ten weeks were observed. In these latices, hydrophilic carboxylic acid moieties covalently bound to the particle surface contribute to the stabilization. Using phase-transfer agents, namely methyl-beta-cyclodextrin (W7 M 1.8) in the process of the co- and terpolymerization of hydrophobic monomers in the emulsion polymerization led to better results.

Autorentext

Dr. Mahmoud Shaker Sunjuk was born on the 1/12/1971 at Amman, Jordan. He completed his Ph.D. in Inorganic and Polymer Chemistry (2003) at Eberhard Karls University. Tuebingen, Germany, his M.Sc. in Analytical Chemistry (1997),at the University of Jordan, Jordan and his B.Sc. in Chemistry (1994), at Yarmouk University, Jordan.