对羟基苯甲酸齐聚物的合成及其与PET的高温酯交换反应

SYNTHESIS OF p-HYDROXYBENZOIC ACID OLIGOMERS AND ITS TRANSESTERIFICATION WITH PET

用对乙酰氧基苯甲酸合成了一系列对羟基苯甲酸的齐聚物 (HBO) ,由于这些齐聚物不溶于大部分有机溶剂 ,因此尝试用傅立叶红外谱半定量地分析齐聚物的聚合度。在这个基础上 ,用该系列齐聚物与 PET在高温下进行不同摩尔比的共混反应 ,DSC的结果表明 ,在 HBO含量为 30 %时 ,酯交换反应的比例较高且完全 ,得到了较为均一的嵌段共聚酯。

A series of p hydroxybenzoic acid oligomers(HBO) were synthesized of p acetoxybenzoic acid (4 ABA). Since the oligomers are insoluble in most organic solvent, we tried to analyze the degree of polymerization of the oligomers half stoichiometricly by the FT IR method. Then, transesterifications were processed at a high temperature between this series of HBOs and PET with different mole ratios. DSC spectrum shows that the HBO/PET products may be block copolymers.