Abstract
The effects of acidic and alkaline solutions to be considered waste on the chemical resistance of high density polyethylene (HDPE) geomembranes (GMs) were evaluated. Damaged and intact smooth/textured specimens were immersed in acidic, alkaline and distilled water (pH=4, 12, 8 and 7), and incubated at 20, 40, 60 and 80 °C respectively. Tensile stress of specimens was periodically determined by constant rate of load tensile testing apparatus while polymer structure was examined by a scanning electro-microscope. Damaged HDPE GMs showed excellent acidity-resistance as intact HDPE GMs. High temperature imparted flexibility in HDPE GMs which in turn showed lower tensile strength.
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