Change of Mechanical Properties of Powder Recyclate Reinforced Polyolefin Based on Gamma Radiation

Abstract

Abstract:In this study, the changes observed in the mechanical properties of standard test specimens that were produced with powder coating reinforced polyolefin (polyethylene and polypropylene) due to gamma radiation were examined. Matrix material of these specimens included low density polyethylene and polypropylene and 5%, 10%, 20%, 30%, 40% and 50% electrostatic powder coating waste by weight, and the samples were exposed to 44 kGry gamma-radiation for twenty four hours. Mechanical tests applied to the specimens after radiation demonstrated that the physical bonding mechanism between matrix material and filler material was reinforced. In the mechanical tests, tensile strength, three-point bending strength, and Izod impact strength of the samples were investigated and the results were compared to the results obtained in the mechanical tests when they were not radiated. Thus, the effects of gamma radiation on the mechanical properties of the filler material, and the electrostatic powder coating reinforced polyethylene and polypropylene were determined. Furthermore, section images of the radiated samples were taken with a scanning electron microscope and compared to the section images of irradiated samples to observe the physical bonding mechanism.

Tetrafunctional epoxy as an all‐purpose modifier for homopolymerized bisphenol A diglycidyl ether

“…Both the impact strength and tensile strength of all DGEBA/TFTE systems containing different spacer lengths (i.e., 6C, 8C, and 10C) first increase then decrease and reach maximum values at 5% loading. Similar maximum improvements at 5% loading were also reported in literature . Below 5% loading, addition of TFTE‐10C increases the crosslinking density (see in DMA results), which is beneficial to tensile strength.…”

Effects of strain rate and temperature on the mechanical behavior of high‐density polyethylene

“…During extrusion which is the principal industrial process applied to PE, it is exposed to high shear stresses and temperatures, which can cause its degradation. Many researchers have been interested on various types of polyolefin, using different rheological models in the molten state . They typically present the influence of branched polymers on the complex modulus.…”

“…They typically present the influence of branched polymers on the complex modulus. Some of these works show the dependency of storage modulus, loss modulus, and phase angle on the polymer molecular structure …”

“…Many researchers have been interested on various types of polyolefin, using different rheological models in the molten state. [11][12][13][14] They typically present the influence of branched polymers on the complex modulus. Some of these works show the dependency of storage modulus, loss modulus, and phase angle on the polymer molecular structure.…”

“…Some of these works show the dependency of storage modulus, loss modulus, and phase angle on the polymer molecular structure. [9][10][11][12][13][14][15] The properties of the polymers are unpreserved during their treatment due to degradation by heat, mechanical stress, and oxidation. The degradation affects the structure of the molecule and consequently the quality of the material.…”