Effect of SEBS and OBC on the Impact Strength of Recycled Polypropylene/Talc Composites

Monti, Marco; Scrivani, Maria Teresa; Gianotti, Valentina

doi:10.3390/recycling5020009

Cited by 13 publications

(14 citation statements)

References 21 publications

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“…The increasing in elongation at break as well as impact strength is a significant evident for enhancement of phase adhesion and successful compatibilization, as reported in the literature [19,41,[50][51][52]. Consequently, the successful compatibilization of 10 wt% vPP contaminated vHDPE (vB10 blend) is only achieved with 5 wt% addition of the ethylenebased olefin block copolymer (C1) due to the improvement in elongation at break and tensile impact strength.…”

Section: Mechanical Propertiesmentioning

confidence: 79%

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

2021

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The most widely used commodity polymers in the rigid packaging industry are polypropylene (PP) and high-density polyethylene (HDPE). For example, blow molding grade of HDPE as a bottle and injection molding grade of PP as a cap are often used to produce detergent bottles. Therefore, the recycled HDPE bottles from post-consumer waste include PP as a contaminant originated from PP bottle caps. To simulate mechanical recycling of bottle waste, the mechanical properties of HDPE-rich-HDPE/PP virgin model blend were studied. For compatibilization, ethylene-based olefin block copolymer, propylene-based olefin block copolymer, ethylene propylene random copolymer, and styrene-butadiene-styrene triblock copolymer were chosen as potential compatibilizer candidates. Contact angle measurements, morphological analysis, adhesion tests of compatibilizer candidates to polymer blend components and the tensile as well as tensile impact properties of the ternary blends were studied. It was found that the ethylene-based olefin block copolymer was the most effective compatibilizer resulting in a return of mechanical properties to those of neat vHDPE due to its ability to encapsulate dispersed vPP particles in a vHDPE matrix (core-shell morphology) and the best adhesion to polymer blend components.

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Section: Mechanical Propertiesmentioning

confidence: 79%

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

2021

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“…Although mechanical recycling is more resource-effective, it is limited due to the presence of toxic compounds in the recycling process. However, a newer technology, which is 3D printing technology, has recently evolved as a technique that can provide sustainable production and recycling of plastics [1,8,9].…”

Section: Introductionmentioning

confidence: 99%

3D Printing PLA Waste to Produce Ceramic Based Particulate Reinforced Composite Using Abundant Silica-Sand: Mechanical Properties Characterization

2020

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Due to the significant properties of silica, thermostatics can be enhanced using silica-additives to maximize the quality of polymer compounds and transform plastics into tailored properties. The silica additives can enhance the handling and quality performance of composites and thermoplastic polymers due to their diverse potential. Besides, using silica as an additive in different characteristics can allow granulates and powders to flow easily, minimize caking, and control rheology. On the other hand, the eruption of 3D printing technology has led to a massive new waste source of plastics, especially the polylactic acid (PLA) that is associated with the fused deposition modeling (FDM) process. In this paper, the impact on the mechanical properties when silica is mixed with waste PLA from 3D printing was studied. The PLA/silica mixtures were prepared using different blends through twin extruders and a Universal Testing Machine was used for the mechanical characterization. The result indicated that increasing silica composition resulted in the increase of the tensile strength to 121.03 MPa at 10 wt%. Similar trends were also observed for the toughness, ductility, and the yield stress values of the PLA/silica blends at 10 wt%, which corresponds to the increased mechanical property of the composite material reinforced by the silica particles. Improvement in the mechanical properties of the developed composite material promotes the effective recycling of PLA from applications such as 3D printing and the potential of reusing it in the same application.

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“…Since the material loses its quality with recycling and higher polymer degradation occurs in the filled plastic compounds, recycling leads to a lower quality secondary materials 6 . Besides, some recent researches are focusing on a better re‐engineering and recycling of these filler reinforced plastics such as the usage of polypropylene (PP)‐based packaging waste that contains impurities in automotive industry 7 . Talc is a commonly used insoluble filler that increases the compatibility between two insoluble polymers widely used in food packaging, which are PP and low‐density polyethylene (PE‐LD) 8,9 .…”

Section: Introductionmentioning

confidence: 99%

Estimating minimum required dwell time for the heat sealing of talc containing polypropylene/low‐density polyethylene packaging films

et al. 2023

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Dwell time is one of the main parameters influencing heat seal quality and process efficiency in flexible packaging. In this study, the rheological behaviour of polypropylene (PP)/low-density polyethylene (PE-LD)-based compound films containing different ratios of talc was examined. The minimum dwell time required to supply a sufficient sealing was estimated based on heat conduction time and reptation time.Reptation is a rheological concept used to described the behaviour of a polymer melt, and the reptation time is the time required for a molecule to escape from its surrounded entangled structure. The results showed that increased levels of talc are associated with elevated complex viscosities, storage and loss modulus as well as an increased seal strength. The estimated minimum required dwell time at the seal initiation temperature (SIT) dropped sharply with the initial introduction of 10 wt% talc.However, increasing the talc ratio to 30 wt% did not create any major change in the estimated time value. Also, observed T-peel strength values for 0.1 and 0.5 s dwell time at SIT confirmed the predicted minimum required dwell time values. On the other hand, when the seal temperature is increased to the higher end of the operation window, time estimations did not match with the observed seal strengths. Here, the melting already starts and the molecules diffuse up to a certain distance before the interface temperature reaches the desired level. Recalculation of the average diffusion distance by including this pre-melting situation can present a better approach for the temperatures above SIT. When the molecules diffused around halfway along the sealant thickness observed, seal strengths reached a sufficient level (2.5 N/25 mm) for both SIT and the highest end of the operation window. In conclusion, it has been revealed that knowing the reptation time and the required time for the heat conduction during the sealing process can help to predict the minimum required dwell time to achieve quality sealing, especially at low sealing temperatures.Additional surface characterizations also helped to elaborate on the influence of changing insoluble filler ratio on the seal initiation properties. It has been showed that the added talc increases the surface free energy and supplies easier wetting at

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Effect of SEBS and OBC on the Impact Strength of Recycled Polypropylene/Talc Composites

Cited by 13 publications

References 21 publications

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

Choosing an Effective Compatibilizer for a Virgin HDPE Rich-HDPE/PP Model Blend

3D Printing PLA Waste to Produce Ceramic Based Particulate Reinforced Composite Using Abundant Silica-Sand: Mechanical Properties Characterization

Estimating minimum required dwell time for the heat sealing of talc containing polypropylene/low‐density polyethylene packaging films

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