Effect of short polyethylene terephthalate fibers on properties of ethylene-propylene diene rubber composites

Abstract

The alteration in some properties of electron beam (EB) cured ethylene-propylene diene rubber (EPDM) reinforced by polyethylene terephthalate (PET) fiber was investigated in this study. Bonding system Resorcinol/Hexamethylenetetramine/Silica (RHS) was used to enhance the fiber/EPDM adhesion and to maintain optimum composite strength properties. Mechanical properties of composites namely; tensile strength, hardness and modulus at 100 % elongation have been enhanced by adding PET fibers and increasing irradiation dose. Moreover, the effect of fiber loading and irradiation dose on the soluble fraction behavior of the composite in benzene was also investigated. The soluble fraction of the composites decreased with increasing the fiber loading and irradiation dose. The extent of fiber alignment and strength of fiber-rubber interface adhesion were analyzed from the anisotropic swelling measurements. In addition, thermal stability of the composites was increased. Besides, the mechanical properties like tensile strength and stiffness were improved by thermal ageing. Scanning electron microscopy (SEM) for the fractured surfaces and Wide-angle X-ray diffraction (WAXD) of the investigated samples confirmed that the adhesion occurred between fibers and EPDM.

Injection moulded all-polypropylene composites composed of polypropylene fibre and polypropylene based thermoplastic elastomer

“…Polyolefin-based TPEs with "dispersed elastomer" phase can also be produced by copolymerization. Using TPE as matrix and thermoplastic fibres as reinforcement composites with a wide processing window can be produced because the melting temperature of semicrystalline TPE materials is very low (~80-100°C) compared to semicrystalline thermoplastic fibres (~130-260°C) [5][6]. Their combination opens a new horizon for the industrial production of all-polymer composites.…”

Physico‐chemical and spectroscopic properties of gamma irradiated ethylene propylene diene monomer rubber/vermiculite clay/maleic anhydride nanocomposites

“…The ntensity of the main peaks of the XRD patterns of EPDM nanocomposites with 5 phr of untreated (VMT) and acid‐treated vermiculite clay, and different contents of maleic anhydride (MA) is shown in Table . The peak at 2 θ = 15–25° represents the phase of semicrystalline EPDM rubber is followed by distinct crystalline regions at 2 θ = 27, 28.5, 31.3, 34.4, 36.2, 47.5, and 56.5 represents the ZnO . The observed peaks for DVMT in nanocomposites with low intensity and, on the other hand the intensity of EPDM rubber matrix would be decreased.…”

Thermal and physicomechanical properties of gamma‐irradiated EPDM/waste newsprint microfibers composites treated using acrylic styrene emulsion as a coupling agent

“…In respect to EPDM rubber, Figure b illustrates its X‐ray pattern as the peak at 2θ° , 20 the semi‐crystalline phase of the EPDM rubber . The peaks at both 2 θ ° of 32, 34.5, 36.4, 48, and 57 represent the crystalline peaks of zinc oxide (ZnO) .…”