Recorded on June 11, 2014
Presented by Michael Sepe
Extensive studies of failures in plastic products show that environmental stress cracking (ESC) is the most common cause of these failures. These studies also show that amorphous materials are primarily affected by this mechanism. ESC is often mistaken for chemical attack since a chemical agent is part of the mechanism. However, ESC is not chemical attack. Therefore, a negative interaction between a plastic part and a harsh chemical environment is not a foregone conclusion and chemical compatibility charts that test materials in an unstressed state are not satisfactory tools for predicting susceptibility to ESC. The simultaneous presence of the chemical or chemicals and stress on the part are required in order for ESC to occur. Consequently, part design and processing are also important elements of preventing ESC. Join injection molding expert Michael Sepe for a webinar that explained the phenomenon of ESC and will illustrate the factors that promote it or prevent it.
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