Poly(propylene carbonates) are prepared from propylene oxide and CO2 with less than 10% cyclic propylene carbonate by product using cobalt based catalysts of structure
preferably in combination with salt cocatalyst, very preferably cocatalyst where the cation is PPN+ and the anion is Cl− or OBzF5−. Novel products include poly(propylene carbonates) having a stereoregularity greater than 90% and/or a regioregularity of greater than 90%.
聚
丙烯碳酸酯是通过
丙烯氧和
二氧化碳在
钴基催化剂的作用下制备的,副产物中含有少于10%的环
丙烯碳酸酯,最好是与盐类辅助催化剂结合使用,尤其是盐类辅助催化剂的阳离子为P
PN+,阴离子为Cl−或OBzF5−。新产品包括具有大于90%立构规则性和/或大于90%构构规则性的聚
丙烯碳酸酯。