以乙醇胺-乙二醇复合体系催化对二氧环己酮(PDO)开环聚合生成聚对二氧环己酮(PPDO)。系统研究了反应时间、温度及单体与催化剂摩尔比(n (M)/n (C))对产物的结构及热力学性能方面的影响。利用红外光谱(IR)、核磁光谱(1 H NMR)、X 射线广角衍射(WAXD)乌氏粘度法及差示扫描量热法(DSC)对聚合产物的结构、特性粘度以及热力学性能进行初步探讨。结果表明，在反应时间为24 h、温度为120℃及 n (M)/n (C)＝500∶1条件下生成的聚合产物性能最佳。乙醇胺-乙二醇复合引发体系能够有效地催化 PDO 开环聚合生成 PPDO 产物。
poly(1,4-dioxanone)(PPDO)were prepared by the polymerization of 1,4-dioxanone (PDO)without solvent using 2-hydroxyethanolamine-glycol as a non-metallic organic catalyst,which has not previously been reported.The effects of the operating parameters,including the reaction temperature,reaction time and the molar ratio of monomer to catalyst (n (M)/n (C)),on the properties of the synthesized PPDO were systemati-cally investigated.The structure of the products was characterized by 1 H NMR,IR and wide-angle X-ray dif-fraction (WAXD).The intrinsic viscosity ([η])was measured using a Ubbelohde viscometer.Thermodynamic properties were characterized by differential scanning calorimetry (DSC).The results indicated that the best polymerization conditions were 140 ℃ and 24 h with n (M)/n (C)equal to 500 ∶ 1.Furthermore,the results demonstrated that 2-hydroxyethanolamine-glycol was an efficient and easily removed catalyst for the ring-open-ing polymerization of PDO.
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