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. 2022 Nov 29;15(23):8516.
doi: 10.3390/ma15238516.

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

Jozef Dobránsky  1 , Miroslav Gombár  2 , Tomáš Stejskal  3
Affiliations

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

Jozef Dobránsky et al. Materials (Basel). .

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.

Keywords: impact strength; material lifetime; polymer composites; simulation; technological waste.

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Conflict of interest statement

The authors declare no conflict of interest. The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of the data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Figure 1
Figure 1
CEAST Resil 5.5 test device with sample location.
Figure 2
Figure 2
Dependence of the unnotched impact strength of PBT on the amount of recycled material before the samples were exposed to elevated temperature (+23 °C).
Figure 3
Figure 3
Dependence of the unnotched impact strength of PBT on the amount of recycled material before and after the samples were exposed to elevated temperature (+23 °C).
Figure 4
Figure 4
Dependence of the unnotched impact strength of PBT on the amount of recycled material before the samples were exposed to elevated temperature (−30 °C).
Figure 5
Figure 5
Dependence of the unnotched impact strength of PBT on the amount of the recycled material before and after the samples were exposed to elevated temperature (−30 °C).
Figure 6
Figure 6
Dependence of the unnotched impact strength of PPA on the amount of recycled material before the samples were exposed to elevated temperature (+23 °C).
Figure 7
Figure 7
Dependence of the unnotched impact strength of PPA on the amount of recycled material before and after the samples were exposed to elevated temperature (+23 °C).
Figure 8
Figure 8
Dependence of the unnotched impact strength of PPA on the amount of recycled material before the samples were exposed to elevated temperature (−30 °C).
Figure 9
Figure 9
Dependence of the unnotched impact strength of PPA on the amount of recycled material before and after the samples were exposed to elevated temperature (−30 °C).
Figure 10
Figure 10
Dependence of the mutual interaction of the amount of recyclate and the temperature of the sample on the value of the unnotched impact strength of PPA.
Figure 11
Figure 11
Dependence of the mutual interaction of the amount of recyclate and the exposure of the sample on the value of the unnotched impact strength of PPA.
Figure 12
Figure 12
Dependence of the mutual interaction of the sample temperature and the exposure of the sample on the value of the unnotched impact strength of PPA.
Figure 13
Figure 13
Dependence of the mutual interaction of the sample temperature and the exposure of the sample on the value of the unnotched impact strength of PPA.
Figure 14
Figure 14
Dependence of the mutual interaction of the sample temperature and the exposure of the sample on the value of the unnotched impact strength of PBT.
Figure 15
Figure 15
Effect of the materials on the impact test value of the unnotched impact strength, depending on the amount of recycled material and the specimen temperature before the exposure.
Figure 16
Figure 16
Effect of the materials on the impact test value of the unnotched impact strength depending on the amount of the recycled material and the specimen temperature after the exposure.
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