The slurry output is then dried and the polymer separated. Limitation is that it has lower creep resistance and inferior fatigue properties compared to polypropylene. Resistant to a wide range of chemicals, most inorganic acids and alkalis at room temperature. Good moisture resistance. Insoluble in organic solvents below 60 C but may be swollen.
Limitations are that it is susceptible to weathering, UV light and environmental stress-cracking.
Alloying of PE with butyl rubber and EPDM improves environmental stress-cracking resistance. Attacked by strong oxidising acids. Limitation due to very high thermal expansion. Poor temperature capability. Good electrical properties- not appreciably affected by humidity due to low wear absorption.