Deformation and energy-absorption characteristics of microcellular EPDM rubber

✍ Scribed by Krishna Chandra Guriya; D. K. Tripathy

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 192 KB
• Volume: 68
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980411)68:2<263::aid-app8>3.0.co;2-o

✦ Synopsis

Compressive stress-strain properties of closed-cell microcellular EPDM rubber vulcanizates with and without a filler were studied with the variation of density. For filler variation studies, silica and carbon black (N330) were used. With a decrease in density, the stress-strain curve for microcellular EPDM behaves differently from that for the solid vulcanizates: The curve rises steeply when cell breakdown occurs. The compressive stress-strain properties are found to depend on the strain rate. The compression set at constant stress increases with decreasing density. The energy-absorption behavior was studied from the compressive stress-strain properties. The efficiency, E, and ideality, I, parameters were also determined as they are useful for the evaluation of closed-cell microcellular rubber as a cushioning and packaging material. These parameters were plotted against stress to find the maximum efficiency and maximum ideality region which will make these materials suitable for cushioning or packaging applications.