stress cracking

Why Do Refillable Travel Bottles Crack After Heavy Use? Reference Standard: ASTM D1693 Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics Short Answer Refillable travel bottles fail primarily due to “molecular chain slip kinetics,” where active surfactants in personal care formulas infiltrate the amorphous regions of the Polyethylene (PE) matrix. This chemical lubrication reduces inter-crystalline friction, causing the polymer to succumb to mechanical squeeze cycles through accelerated Environmental Stress Cracking (ESC). Molecular Chain Slip Kinetics: Embrittlement of PE Inter-Crystalline Amorphous Regions by Surfactant Infiltration The structural integrity of a refillable travel bottles manufactured from Polyethylene (PE) is determined by its semi-crystalline morphology. PE consists of highly ordered crystalline lamellae … 続きを読む