Preparation and properties of polytetrafluorethylene filled ethylene–propylene–diene monomer composites

Abstract

Ethylene-propylene-diene monomer/polytetrafluorethylene (EPDM/PTFE) composites based on EPDM and electron beam irradiated PTFE powders (MS-II, MS-III, and MS-V, with mean diameter 5 lm, 1 lm, and 0.1 lm, respectively) were prepared by a mechanical compounding technique. The curing characteristics, morphologies, mechanical properties, and abrasion behaviors of these composites were investigated. The curing measurements indicated that the addition of lower loading of MS-III or MS-V enhanced the lubrication of EPDM compounds and delayed the curing process. The morphological structure of the composites demonstrated that the MS-III and MS-V were uniformly dispersed in EPDM matrix and the efficient polymer-filler interfacial interactions were constructed. In comparison with EPDM/MS-II and EPDM/ MS-III, EPDM/MS-V exhibited outstanding tensile strength, tear strength, elongation at break, and abrasion resistance due to the nanometer particle dimension and good dispersion of MS-V as well as the stronger interfacial interactions between MS-V and the EPDM matrix.

Thermal aging of bentonite‐filled ethylene propylene diene monomer composites

“…However, the low mechanical properties become the drawback which limits the use of EPDM in most industrial applications. Therefore, filler reinforcement is required or necessary to improve the mechanical properties of EPDM to suit the high performance applications . In outdoor applications, the surface properties of any materials particularly polymer deteriorates which influences its service life.…”