聚（癸二酸-1,3-丙二醇）酯低聚物的合成与表征

在无催化剂、相对较低温度下合成了聚(癸二酸-1,3-丙二醇)酯低聚物。GPC色谱显示,过量1,3-丙二醇常使粗产物呈现多组分,但随其用量减少,粗产物逐渐变均一。FTIR光谱表明,低聚物主链为酯键结构,且羟基含量随单体摩尔比降低及第二阶段反应进行而趋于减小。1H NMR分析发现,低聚物实际摩尔组成远低于初始单体摩尔比;低聚物摩尔质量为967.14～3970.49g/mol,1,3-丙二醇封端度为38%～66%。该低聚物期望在口香糖制备中用作无毒、环境友好、可生物降解型增塑剂。

Synthesis and Characterization of Poly(1,3-propanediol-sebacate) Oligomers

Poly(1,3-propanediol-sebacate) oligomers were synthesized under relatively low temperature without any catalysts. GPC chromatograms showed that the coarse products often presented multi-components because of the excess 1,3-propanediol, but they gradually became homogeneous with the dosage decrease of 1,3-propanediol. FTIR spectra demonstrated that the main chains of the oligomers were formed by ester bonds, and the contents of hydroxyl groups tended to drop down as the molar ratio of monomers decreased and the second-stage reaction was carried out. Based on the 1HNMR analysis, it was found that the actual molar compositions of the oligomers were much lower than the initial molar ratios of monomers, and their molar mass ranged from 967.14 to 3970.49 g/mol, and the terminating degrees from 1,3-propanediol were within 38%~66%. The oligomers were expected to be used as nontoxic, environment-friendly and biodegradable plasticizers in preparation of chewing guns.