The Influence of the Use of Technological Waste and the Simulation of Material Lifetime on the Unnotched Impact Strength of Two Different Polymer Composites

Abstract

The article deals with the assessment of the impact of technological polymer waste resulting from plastic injection technology and the subsequent simulation of the lifetime of polymer products on the impact strength of two different polymer composites. Two different types of polymer composites used to produce plastic parts in the automotive industry were chosen for the research. Based on the evaluation of the PBT composite before exposing the specimens to elevated temperature, it can be concluded that the concentration of the recycled material in the virgin material only affects the values of the unnotched impact strength of the PBT composite when the recycled material accounts for at least 50 wt.%. The results of the unnotched impact strength of the test specimens exposed at 150 °C/500 h make it evident that the addition of recycled material to the virgin material significantly reduces the components’ service lives. The same trend could be observed with the second tested composite material, PPA.

High‐quality modification of general polypropylene by the synergistic effect of zinc adipate, hydrotalcite, and polypropylene (SP179)

“…The activation energy for the crystallization of polymers reflects the ease of the crystallization of polymers to some extent. Generally, the activation energy is calculated by the Kissinger method, 39 as shown in Equation (11).…”

“…56 Figure 9 shows the curve of ln(Φ/T p 2 ) versus 1/T p between pure iPP and iPP with the added 30% SP179. ΔE was determined by Equation (11). The calculated crystallization activation energy value of iPP with HT, ZnAA, and 30% SP179 was 13.40 KJ mol À1 , which was increased in comparison with that of iPP (11.55 KJ mol À1 ).…”

“…PP is widely used in automobiles, medicine, packaging, tableware, construction materials, films, and other fields because of its excellent heat resistance (110–150°C, the heat deflection temperature), 4 chemical corrosion resistance, 5 creep resistance (21.8 kcal/mol, creep rupture), 6 electrical insulation (10 14 Ω m at 90°C, resistivity), 7 stress cracking resistance, 8 low density (0.9 g cm −3 ), 9 high toughness, 10 and high impact strength 1 and so forth, with continuously expanding applications. At the same time, PP also has become one of the most popular and promising class among the five general synthetic resins: polyethylene, polyvinyl chloride, polystyrene, PP, and ABS resin 11–14 . However, owing to the lack of impact resistance of ordinary PP, the expansion of its applications is limited.…”

“…At the same time, PP also has become one of the most popular and promising class among the five general synthetic resins: polyethylene, polyvinyl chloride, polystyrene, PP, and ABS resin. [11][12][13][14] However, owing to the lack of impact resistance of ordinary PP, the expansion of its applications is limited. Thus, it is of significant practical importance to render high additive properties by the toughening modification of ordinary PP and explore its new application fields.…”