Migration Behavior of Lubricants in Polypropylene Composites under Accelerated Thermal Aging

Polymers

Seung-Goo Lee¹  Seon-Woong Koo¹  Arom Oh²  Han-Ki Lee²  Dae-Sik Kim²  Mun-Gyu Bak²  Jong-Sung Won³ 

[1] Department of Advanced Organic Materials & Textile Engineering, Chungnam National University, Daejeon 34134, Korea;Department of Plastic Materials Research Team, Automotive Research & Development, Hyundai Motor Group, Hwaseong-si 445-010, Korea;Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USA;

关键词: polypropylene;    migration;    lubricant;    accelerated aging;    additives;    thermoplastic composites;   

DOI  :  10.3390/polym13111723

来源: DOAJ

【 摘 要 】

The surface migration of lubricants degrades the quality of thermoplastic polymer composites. In this study, the surface migration of lubricants in polypropylene composites were studied to improve the quality of the composites. Polypropylene (PP)/lubricant composites were manufactured using a co-rotating twin-screw extruder and injection molding, and the migration phenomena of the lubricant in the PP/lubricant composites were investigated under accelerated aging conditions with temperatures in the range of 20 to 90 °C and humidity of 100% for 72 h. The interrelation between the surface migration properties of PP/lubricant composites were investigated by considering their microstructural and morphological features, which were influenced by the thermal aging conditions. Further, the microstructural and morphological features were examined by contact angle, surface energy, attenuated total reflectance Fourier-transform infrared spectrometry, X-ray photoelectron spectroscopy, close-up digital imaging, and atomic force microscopy analyses. The polypropylene composites containing the magnesium stearate as the lubricant were found to exhibit a more stable migration behavior than the polypropylene composites containing a calcium stearate lubricant. This is attributed to multiple synergistic factors, such as interfacial tension and work of adhesion between PP and the lubricant. The findings of this study can be utilized to effectively manufacture high-quality thermoplastic composites for the fourth industrial revolution.

【 授权许可】

Unknown