铬配合物催化环氧烷烃与二氧化碳交替共聚

Study on Copolymerization of Epoxides With Carbon Dioxide by Using Chromium(III) Complex as Catalyst

以2,4-二叔丁基苯酚、多聚甲醛以及N-二甲基乙二胺为原料,经过曼尼希反应合成了相应的氨基双酚化合物,并将氨基双酚化合物在无水无氧条件下与无水氯化铬(CrCl_2)在四氢呋喃中反应,之后再在空气中氧化制备出相应的三价氨基双酚铬配合物。制备的氨基双酚氯化铬配合物在有机碱DMAP,PPNCl及N-Me Im的作用下可以有效的引发环氧环己烷与二氧化碳的开环共聚,得到聚碳酸酯。通过核磁共振氢谱(~1H NMR)进行表征,利用凝胶渗透色谱(GPC)对所得到的聚碳酸酯进行分子量的测定。

Amino bisphenol compound was prepared from 2,4-di-tert-butylphenol, paraformaldehyde and N-dimethylethylenediamine by Mannich reaction, and then the amino bisphenol compound reacted with anhydrous CrCl_2 in tetrahydrofuran,at last the product was oxidized in air to prepare trivalent aminobisphenol chromium complex. Ring opening copolymerization of cyclohexene oxide with carbon dioxide was carried out under the interaction of the trivalent aminobisphenol chromium complex and organic base DMAP,PPNCl,N-Me Im to obtain polycarbonate. And the polycarbonate was characterized by 1H NMR and GPC.