Abstract

The aim of the article was to study the possibility to use a sulfonic ester derivative of isophthalic acid as nucleating agent for increasing the durability of poly (lactic acid) designed for 3 D printing. The neat and nucleated PLA achieved via melt compounding were characterized through differential scanning calorimetry, polarized optical microscopy and by measuring its functional properties as Izod impact resistance and heat deflection temperature. The ability of nucleated PLA to be shaped as filaments and the potential of the obtained filaments to be 3 D printed as well were studied. The nucleation with a sulfonic ester derivative of isophthalic acid changes the polymer morphology and therefore generates the improvement of PLA functional properties and its durability. The obtained nucleated PLA is able to be shaped as filaments, which prove to have better 3 D printability because it melts and crystallizes in narrow temperature ranges, crystallizes with high speed, at higher temperature and the 3 D printed items can be quickly removed from the printing support.

摘要

本文的目的是研究使用间苯二甲酸的磺酸酯衍生物作为成核剂以提高设计用于3D打印的聚乳酸的耐久性的可能性。通过差示扫描量热法，偏振光学显微镜并通过测量其功能性质（如悬臂梁式抗冲击性和热变形温度）来表征通过熔融复合获得的纯净和有核的PLA。研究了成核的PLA形成长丝的能力以及获得的长丝3D印刷的潜力。间苯二甲酸磺酸酯衍生物的成核作用改变了聚合物的形态，因此改善了PLA的功能性能及其耐久性。所得的有核PLA可以成型为长丝，