Dielectric properties of flame resistant EPDM composites

• Published in: Polymer degradation and stability Vol. 70; no. 2; pp. 259 - 262
• Main Authors: Canaud, Cristine, Visconte, Leila Léa Yuan, Sens, Márcio Antônio, Nunes, Regina Célia Reis
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.01.2000; Elsevier Science
• Subjects: Aluminum hydroxide; Applied sciences; Dielectric properties; EPDM compositions; Exact sciences and technology; Flame resistance; Organic polymers; Physicochemistry of polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; EPDM compositions; Flame resistance; Dielectric properties; Aluminum hydroxide; Performance evaluation; Aluminium Hydroxides; Carbon black; Electrical properties; Property composition relationship; Mechanical properties; Dispersion reinforced material; Electrical cable; Experimental study; Wire; Fabrication property relation; Thermal properties; EPDM rubber; Flammability; Permittivity
• ISSN: 0141-3910; 1873-2321
• DOI: 10.1016/S0141-3910(00)00124-5

Formulations of ethylene-propylene-diene rubber containing mixtures of aluminum hydroxide (ATH) and carbon black (HAF) as fillers were developed, aiming to achieve a synergism in properties, to fit national and international standards for application as insulation in electric wires and cables, yet keeping the fire resistance. After flammability determination, the developed compositions were analyzed for dielectric constant, dissipation factor, dielectric strength, and volumetric and surface resistivity. It was found that for flame resistance, a minimum amount of 160 phr of ATH must be present. However, this composition contains 15 phr of HAF, which is harmful to the electric properties. Only the composition with 170/7.5 (ATH/HAF) exhibited the desired performance.