Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, E-28006 Madrid, Spain.
Department of Chemistry-Ångström Laboratory, Uppsala University, SE-751 21 Uppsala, Sweden.
Int J Mol Sci. 2023 Feb 1;24(3):2734. doi: 10.3390/ijms24032734.
By employing a variation of the polyamidation method using in situ silylated diamines and acid chlorides, it was possible to obtain a rod-type polyamide: poly(-phenylene terephthalamide) (PPTA, a polymer used in the high-value-added material Kevlar), with a molecular weight much higher than that obtained with the classical and industrial polyamidation method. The optimization of the method has consisted of using, together with the silylating agent, a mixture of pyridine and a high-pKa tertiary amine. The research was complemented by a combination of nuclear magnetic resonance and molecular simulation studies, which determined that the improvements in molecular weight derive mainly from the formation of silylamide groups in the growing polymer.
采用原位硅烷化二胺和酰氯的聚酰胺化方法的变体，成功得到了棒状聚酰胺：聚对苯二甲酰对苯二胺（PPTA，一种用于高附加值材料凯夫拉的聚合物），其分子量远高于经典和工业聚酰胺化方法得到的分子量。该方法的优化包括使用硅烷化试剂和吡啶与高 pKa 叔胺的混合物。研究还结合了核磁共振和分子模拟研究，确定分子量的提高主要源于在生长聚合物中形成硅酰胺基团。
