邻苯二甲酸酐-聚醚二元醇-环氧丙烷三元共聚反应的影响因素

Influence factors of phthalic anhydridepolyether glycol-propylene oxide ternary copolymerization

在双金属氰化物络合催化剂Zn3[Co(CN)6]2·xZnCl2·yH2O.zL(L代表有机配体)(DMC)催化作用下,对邻苯二甲酸酐(PA)、低相对分子质量聚醚二元醇(DLL 400)和环氧丙烷(PO)进行聚合反应,探讨了聚合反应机理,考察了聚合反应的影响因素。结果表明,在DMC催化作用下,PA、DLL 400与PO发生了配位插入的开环共聚合反应,在温度130℃、时间5 h、DMC质量分数400×10-6的最佳反应条件下,PA转化率达到100%,共聚物的羟值(KOH)、酸值(KOH)、相对分子质量、分子量分布和黏度分别为114.8 mg/g、0.05 mg/g、977、1.10、2 450 mPa·s。

PA-DLL 400-PO terpolymer was syn-thesized flora polyether glycol with low relative mo-lecular mass, （ DLL 400 ）, phthalic anhydride （ PA ） and propylene oxide （ PO ） through polymerization with a bimetallic cyanide complex catalyst Zn3 [ Co （CN）632 · xZnC12 · yH2O · zL（ L stands for organ-ic ligands）（DMC） as the catalyst,and the reaction mechanism of the copolymerization was studied, and the influence factors were investigated. The results showed that the coordination ring-opening copoly-merization of PA, DLL 400 and PO occurred. The optimal reaction conditions of PA-DLL 400-PO co-polymerization were reaction temperature 130 ℃, reaction time 5 h and mass fraction of DMC 400 × 10^-6 under these conditions the conversion of PA was up to 100% , the hydroxyl value（ KOH）, acidic value （KOH） , relative molecular mass, molecular weight distribution and viscosity of the copolymer were 114. 8 mg/g, 0. 05 mg/g, 977, 1. 10, 2 450 mPa · s respectively.