Aliphatic Polyesters by Bismuth Triflate-Catalyzed Polycondensations of Dicarboxylic Acids and Aliphatic Diols
Aliphatic Polyesters by Bismuth Triflate-Catalyzed Polycondensations of Dicarboxylic Acids and Aliphatic Diols
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DOI：
10.1021/ma8017662
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发表时间：
2008-11-25
期刊：
影响因子：
5.5
通讯作者：
Kricheldorf, Hans R.
中科院分区：
文献类型：
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作者：
Buzin, Pavel;Lahcini, Mohammed;Kricheldorf, Hans R.
脂肪二羧酸 (ADA) 与 1,4-丁烷或 1,6-己二醇的缩聚反应在 80 或 100 摄氏度下进行本体缩聚。温度和单体/催化剂比例发生变化。使用三氟甲磺酸铋 Bi(OTf)(3) 作为催化剂，获得高达 30 000 Da 的数均分子量（M-n'S，未校正的 SEC 数据）。用钠、镁、铝、锌、锡(II)、钪和铪的三氟甲磺酸盐进行类似的缩聚，但用 Bi(OTf)(3) 实现了最高的 Mn 值。缩聚和模型实验证明，大多数三氟甲磺酸酯在100℃以上催化1,4-丁二醇形成四氢呋喃。因此，1,4-丁二醇的缩聚需要一定的温度
Polycondensations of aliphatic dicarboxylic acids (ADAs) with 1,4-butane or 1,6-hexane diol were conducted in bulk at 80 or 100 degrees C. Temperature and monomer/catalyst ratio were varied. With bismuth triflate, Bi(OTf)(3), as catalyst, number average molecular weights (M-n'S, uncorrected SEC data) up to 30 000 Da were obtained. Analogous polycondensations were performed with the triflates of sodium, magnesium, aluminum, zinc, tin(II), scandium, and hafnium, but the highest M-n values were achieved with Bi(OTf)(3). Polycondensations and model experiments proved that most triflates catalyzed the formation of tetrahydrofuran from 1,4-butane diol above 100 degrees C. Therefore, polycondensations of 1,4-butane diol required temperatures