Synthesis of a Biomass Tyramine-derived Hydroxyl-amide Nucleating Agent and Its Effect on Crystallization and Properties of Polyamide 6
简介：The chemical structure of polyamide 6(PA6)dictates that only 50％of hydrogen bonds participate in crystallization during the crystal-lization process,resulting in the properties of its products being significantly dependent on the molding process.Therefore,the design and de-velopment of nucleating agents suitable for PA6 holds great practical significance for high-performance PA6 materials.Amide-based nucleating agents can effectively improve the crystallization rate by increasing intermolecular hydrogen bond density.Further introduction of hydroxyl groups can enhance the hydrogen bonding interactions between the nucleating agent and PA6.In this study,a hydroxyl-containing amide-based nucleating agent,BHT,was designed and synthesized using a tyramine-based biomass as the raw material.These results demonstrated that BHT exhibited good structural compatibility with PA6.After adding 1 wt％BHT,the crystallization temperature of PA6 increased from 170.9℃ to 193.3 ℃,the crystallinity increased 16.6％,the heat distortion temperature and Vicat softening temperature rose to 89.5 and 187.8 ℃,re-spectively,the haze decreased to 46％,achieving the synergistic optimization of mechanical,thermal,and optical properties.The in situ time-re-solved FTIR results indicated that the addition of BHT increased the enthalpy of hydrogen bond formation during the nucleation stage,facilitated the segmental conformation adjustment of PA6,and enhanced the molar concentration of trans-conformations,ultimately leading to an im-provement in the crystallization rate.展开
学者：Jia-LeWuWen-haoXiaoJing-BoJiang-HuaLinRui-JieXUCai-HongLEI
关键词：Nucleating agentPolyamide 6Crystallization propertiesNucleation mechanism
在线出版日期：2026-04-03 （网站首发日期）
