芳香族非晶聚酯合成及其3D打印性能

摘要

以对苯二甲酸(PTA)、间苯二甲酸(IPA)、乙二醇(EG)为原料制备了高IPA含量的芳香族共聚酯,通过1H NMR、毛细管黏度计等方法分析了共聚酯的特性黏数和分子链结构等,采用DSC和WAXD方法研究了共聚酯的结晶性能,并研究了芳香族共聚酯的熔融沉积成型(FDM)3D打印性能以及FDM制品的力学性能.实验结果表明,IPA/PTA混合二甲酸易与EG聚合制备芳香族共聚酯,当混合二甲酸中IPA的摩尔分数大于0.40时,制备的芳香族共聚酯是典型的非晶聚合物,在较宽的温度范围内(190～220℃)能满足FDM成型工艺的需求,且制备的制品具有较好的力学性能.%Amorphous aromatic co-polyesters with high isophthalic acid(IPA) content were synthesized from terephthalic acid,IPA and ethylene glycol. The molecular structures and crystallization properties of the co-polyesters were characterized by means of 1H NMR,DSC and WAXD. The fused deposition modeling(FDM) process of the co-polyester and the mechanical properties of the FDM products were investigated. The results showed that,the co-polyester with IPA content higher than or equal to 0.40(x) in the mixed acids was a typical amorphous polymer and was a fitting material for the FDM process in the temperature range of 190-220℃. The FDM product manufactured from the co-polyester had good mechanical properties.