Long-term stress relaxation prediction for elastomers using the time–temperature superposition method

Networks of polysaccharides with hydrophilic and hydrophobic characteristics in the presence of co-solute

“…Given current technology, we cannot obtain mechanical measurements at times shorter of a tenth of a second, and experiments that are longer than 10 5 s are prohibitive in terms of equipment availability. Nevertheless, investigators are interested in combining rheological data at different temperatures and frequencies in an attempt to expand the window of observations of physicochemical phenomena [28].…”

Stress relaxation behavior of EPDM seals in polymer electrolyte membrane fuel cell environment

“…Physical relaxation usually happens at the beginning of the stress relaxation. Chemical stress relaxation and thermal degradation are due to increased movements of the molecular chains at increased temperature, which, as a result, causes chemical reactions or even chain scission [12].…”

Life-time prediction of a chloroprene rubber (CR) O-ring using intermittent compression stress relaxation (CSR) and time-temperature superposition (TTS) Principle

“…12,13 S. Ronan et al predicted the life-time of natural rubber by using both continuous and intermittent CSR tests. 14 One of the most important points in predicting the lifetime of elastomers is an accurate mimic of the environment of its application. Existing studies on predicting life-times by CSR testing largely use a diminutive sample of a small disc or washer.…”

“…Recent studies have used discs of diameter lower than 30 mm and washers of outer diameter lower than 42 mm. 6,13,14 The use of a reduced sized sample could have the following problems: 1) the difference of shape could lead to different stress responses to compression; 2) the different exposure area-to-total surface area ratio to atmosphere could lead to a different degradation rate; 3) data could be rendered unreliable as a diminutive specimen may have a different degree of crosslinking from an actual O-ring.…”