大孔聚苯乙烯树脂支载聚乙二醇的合成及其催化性能的研究

Studies on the Synthesis and Catalytic Activity of Macroporous Polystyrene-supported PEG

聚乙二醇(PEG)是一类有效的相转移催化剂。将长链PEG或其单甲醚支载到微孔聚苯乙烯树脂上,制成相转移催化剂,催化有机反应已有许多报道。

Six macroporous polystyrene-supported PEG catalysts were prepared. These catal-ysts have higher catalytic activity than microporous polystyrene-supported catalysts in nu-cleophilic substitution reactions. The activity of the catalysts were highly affected by thedegree of crosslinking of the polystyrene resin, the chain length of PEG supported on polysty-rene resin, the dielectric constant of the solvents and the times of recycling of the catalysts,