Properties of Polypropylene (PP)/Ethylene-Propylene Diene Terpolymer (EPDM)/Natural Rubber (NR) Vulcanized Blends: The Effect ofN,N-m-Phenylenebismaleimide (HVA-2) Addition

Abstract

This paper discusses process development, tensile properties, morphology, oil resistance, gel content, and thermal properties of polypropylene (PP)/ethylene-propylene diene terpolymer (EPDM)/ natural rubber (NR) vulcanized blends with the addition of N,Nm-phenylenebismaleimide (HVA-2) as a compatibilizer. Blends were prepared in several blend ratios in a Haake Polydrive with temperature and rotor speed of 180 C and 50 rpm, respectively. Results indicated that the combination of dicumyl peroxide (Dicup) with HVA-2 shows high torque development and stabilization torque as compared to the blend with Dicup vulcanization alone. In terms of tensile properties, the combination of Dicup with HVA-2 shows higher tensile strength, tensile modulus (M 100 ), elongation at break, oil resistance, and gel content in all blend ratios compared to similar vulcanized blends with Dicup without HVA-2 addition. Scanning electron microscope (SEM) micrographs of the blends support that the cross-linking and compatibilization occur during the process of the vulcanized blend containing HVA-2. In the case of crystallinity of the blends, the addition of HVA-2 in Dicup vulcanized blend revealed a tendency for the percentage of crystallinity (Xc) to decrease. The addition of HVA-2 in Dicup vulcanization also produced blends with good thermal stability dealing with the so-called coagent bridge formation.

Cure Characteristics, Mechanical and Swelling Properties of Marble Sludge Filled EPDM Modified Chloroprene Rubber Blends

“…Ethylene-propylene-diene monomer (EPDM) is obtained by polymerizing ethylene and propylene with small amount of non conjugated diene, which imparts usually good aging property, good weathering, oxidation and chemical resistance, high mechanical and electrical properties. Usually the blending of EPDM rubber with other rubber have given the compounds with good physical properties [1][2][3][4][5][6][7][8][9][10][11][12].…”

Tensile Properties and Melt Flow Index of Polypropylene/Ethylene Propylene Diene Monomer Nanocomposites

“…EPDM is used in electrical insulation due to its combination of superior electrical properties, its flexibility over a wide temperature range and its resistance to moisture and weather [4]. However, synthetically produced EPDM is relatively expensive when compared with other conventional elastomers [5]. In order to reduce the production cost, polypropylene (PP) was blended with EPDM.…”

The Effects of TOR as a Compatibilizer on Tensile and Morphological Properties of Styrene Butadiene Rubber/Recycled Chloroprene Rubber (SBR/CRr) Blends

“…It has linear and cyclic macromolecules [4][5]. It contain one double bonds per eight carbon atoms with 80% of the double bonds arranged in a trans isomeric double bonds [6]. In our previous works [7][8], the curing characteristics, physical properties and morphological properties of Styrene Butadiene Rubber/recycled Chloroprene Rubber (SBR/CRr) Blends were reported.…”