Abstract
AbstractThe study on homogeneous rare earth coordination catalysts, LnL3‐Al(i‐Bu)3‐CCl4, for the copolymerization of styrene with acrylonitrile has been successfully carried out for the first time. Some features and kinetic behavior of copolymerization of styrene with acrylonitrile by Nd(P204)3‐Al(i‐Bu)3‐CCl4 system are described. The catalyst sites appear to possess both coordinate anionic and free radical characteristics. The catalytic activity of various rare earth elements in Ln(P204)3 and ligands in NdL3 for the copolymerization have the following order, respectively: Yb > Er > Tb ∼ Tm > Ho > Ce > Lu ∼ Sm ∼ La > Pr > Nd, and Nd(naph)3 > Nd(P204)3 ∼ Nd(P507)3 > Nd(acac)3·3H2O. An alternating‐rich copolymer of styrene‐acrylonitrile with a high softening point (195–230°C) was obtained by the LnL3‐Al(i‐Bu)3‐CCl4 systems in toluene at 80°C.
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