Migration Behavior of Lubricants in Polypropylene Composites under Accelerated Thermal Aging

润滑油 材料科学 复合材料 聚丙烯 硬脂酸镁 硬脂酸钙 X射线光电子能谱 接触角 衰减全反射 硬脂酸盐 傅里叶变换红外光谱 化学工程 原材料 化学 有机化学 剂型 色谱法 工程类
作者
Mun-Gyu Bak,Jongsung Won,Seon-Woong Koo,Arom Oh,Hanki Lee,Dae-Sik Kim,Seung Goo Lee
出处
期刊:Polymers [Multidisciplinary Digital Publishing Institute]
卷期号:13 (11): 1723-1723 被引量:5
标识
DOI:10.3390/polym13111723
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.
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