高级脂肪醇基聚醚一元醇的合成研究

Synthesis of Higher Fatty Alcohol￣based Monohydroxy Polyether

以高级脂肪醇为起始剂,双金属氰化物络合物(DMC)为催化剂合成了一种分子量约2100 g/mol的聚醚一元醇。讨论了起始剂水分、起始剂种类、环氧丙烷(PO)进料速率、聚醚中引入的环氧乙烷(EO)含量、环氧烷烃(PO/EO)共聚方式等条件对聚合反应活性以及产物性能的影响。结果表明,起始剂水分宜控制在0.04%以下;起始剂结构和种类、PO进料速率、PO/EO共聚方式都会对聚醚一元醇性能产生影响;合成的聚醚一元醇具有分子量分布窄、不饱和度低、浊点可调等特点。

A monohydroxy polyether with molecular weight of about 2100 g/mol was synthesized with higher fatty alcohol as initiator and a double metal cyanide complex(DMC)as catalyst.The effects of initiator water content,initiator type,propylene oxide(PO)feed rate,ethylene oxide(EO)content and PO/EO copolymerization mode on the polymerization activity and product properties were discussed.The results showed that the water content of the initiator should be controlled below 0.04%.The properties of polyether monoalcohols were affected by the structure and type of initiator,the PO feed rate and the copolymerization mode of PO/EO.The synthesized monohydroxy polyether had the characteristics of narrow molecular weight distribution,low unsaturation and adjustable cloud point.