POS9-0519
Property Modification of Recycled PA66: Effects of Tannic Acid and Nucleation Agent
Topic
S9. Polymer Technology for Sustainability
When and Where
Oct 1, 2026
08:30 - 09:30
Room 301 (Grand Ballroom)
Session Chairs
Jinkee HONG
Ki Su KIM
Presenter(s)
Sosan Hwang (Sustainable Materials R&D Center, Mobility Materials R&D Division, Net Zero Technology R&D Laboratory, Korea Automotive Technology Institute)
Co-Author(s)
Abstract
With the increasing need to recycle waste plastics from End-of-Life Vehicle (ELV), studies on utilizing recycled engineering plastics have been actively conducted. Particularly, polyamide 66 (PA66), a high performance material used in automotive parts, is challenging to recycle. Due to its high processing temperature and hygroscopicity, PA66 undergoes thermal and hydrolytic degradation during recycling, leading to significant property decline Therefore, the development of material technologies to enhance the properties and functionality of recycled PA66 has become increasingly important. Controlling properties using additives is an effective method to improve recycled polymers. Among these, tannic acid (TA) has garnered attention as an eco-friendly material with multiple phenolic groups that can influence property modifications through polymer interactions. Additionally, nucleation agent (P22, Brüggemann) can adjust mechanical and thermal characteristics by controlling crystallization behavior.
In this study, tannic acid (0–3 wt%) and a nucleation agent (0.5 wt%) were incorporated into recycled PA66 to investigate their effects on mechanical and thermal properties. The addition of TA increased the flexural strength, melting point, onset decomposition temperature, and activation energy, contributing to improved rigidity and thermal stability. However, some mechanical properties, including tensile strength, elongation at break, and impact strength, decreased with increasing TA content, suggesting the existence of interrelationships among material properties. Furthermore, the addition of 0.5 wt% nucleation agent improved tensile strength, whereas its effect on thermal properties was limited. Therefore, tannic acid and the nucleation agent were simultaneously incorporated to achieve the advantages of both additives.
This research was supported by the Ministry of Trade, Industry & Energy(MOTIE) funded by the Korean government (RS-2024-00421052).
In this study, tannic acid (0–3 wt%) and a nucleation agent (0.5 wt%) were incorporated into recycled PA66 to investigate their effects on mechanical and thermal properties. The addition of TA increased the flexural strength, melting point, onset decomposition temperature, and activation energy, contributing to improved rigidity and thermal stability. However, some mechanical properties, including tensile strength, elongation at break, and impact strength, decreased with increasing TA content, suggesting the existence of interrelationships among material properties. Furthermore, the addition of 0.5 wt% nucleation agent improved tensile strength, whereas its effect on thermal properties was limited. Therefore, tannic acid and the nucleation agent were simultaneously incorporated to achieve the advantages of both additives.
This research was supported by the Ministry of Trade, Industry & Energy(MOTIE) funded by the Korean government (RS-2024-00421052).
