Environmental Stress Cracking of Automotive Interior Materials Exposed to Common Personal Care Products
摘要
Acrylonitrile–butadiene–styrene (ABS) and poly(vinyl chloride) (PVC)/acrylic (PVC/Acrylic) blends are commonly used in automotive interiors, which may include materials used for vehicle dashboards, push buttons, trim, etc. However, these polymers can be suspectable to environmental stress cracking (ESC) when simultaneously exposed to certain chemicals, such as those commonly found in personal care products, and stress for extended periods of time. ESC can cause changes in material properties that can be accelerated by temperature, concentration of the incompatible chemical, and level of applied stress. The goal of this study is to provide fracture surface examples of ESC in ABS and PVC/Acrylic caused by personal care products commonly used by passengers in a vehicle. Fractographic analysis of representative fracture surfaces using optical microscopy and scanning electron microscopy (SEM) will be presented and compared between ABS and PVC/Acrylic. Characteristic fracture features of ESC were observed in samples of ABS and PVC/Acrylic exposed to hand sanitizer and sunscreen, whereas petroleum jelly did not induce ESC in either material. This study aims to provide a reference for the characteristic features caused by these personal care products by highlighting the similarities and differences observed in the fractures.