Manufacture and Characterization of Polypropylene (PP) and High-Density Polyethylene (HDPE) Blocks for Potential Use as Masonry Component in Civil Construction

Ferreira, T. C. dos R.; Mendes, Gleisson Amaral; Oliveira, Andrielli Morais de; Dias, Carmen Gilda Barroso Tavares

doi:10.3390/polym14122463

Cited by 7 publications

(4 citation statements)

References 62 publications

(60 reference statements)

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“…The researchers suspected that the lower cohesion was also attributed to the 20–30% reductions in the flexural modulus. Use of PCR PP and HDPE from alcohol and mineral water bottles was investigated for use in rotational moulded parts by Ferreira et al [ 23 ]. The authors focused on the use in construction building blocks.…”

Section: Resultsmentioning

confidence: 99%

Recent Advancements towards Sustainability in Rotomoulding

Kelly-Walley,

Martin,

Ortega

et al. 2024

Materials

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Rotational moulding is a unique low-shear process used to manufacture hollow parts. The process is an excellent process method for batch processing, minimal waste and stress-free parts. However, the process has drawbacks such as long cycle times, gas dependency and a limited palette of materials relative to other process methods. This review aimed to shed light on the current state-of-the-art research contributing towards sustainability in rotational moulding. The scope of this review broadly assessed all areas of the process such as material development, process adaptations and development, modelling, simulation and contributions towards applications carving a more sustainable society. The PRISMA literature review method was adopted, finding that the majority of publications focus on material development, specifically on the use of waste, fillers, fibres and composites as a way to improve sustainability. Significant focus on biocomposites and natural fibres highlighted the strong research interest, while recyclate studies appeared to be less explored to date. Other research paths are process modification, modelling and simulation, motivated to increase energy efficiency, reduction in scrap and attempts to reduce cycle time with models. An emerging research interest in rotational moulding is the contribution towards the hydrogen economy, particularly type IV hydrogen vessels.

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Section: Resultsmentioning

confidence: 99%

Recent Advancements towards Sustainability in Rotomoulding

Kelly-Walley,

Martin,

Ortega

et al. 2024

Materials

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“…High-density polyethylene (HDPE) is a versatile commodity polymer widely employed in various industrial sectors, including packaging, automotive, construction, and pipes . Its numerous advantages, such as desirable mechanical properties, ease of processing, cost-effectiveness, and chemical resistance have established this material as one of the most widely used thermoplastics globally .…”

Section: Introductionmentioning

confidence: 99%

Enhancing Mechanical Performance of High-Density Polyethylene at Different Environmental Conditions with Outstanding Foamability through In-Situ Rubber Nanofibrillation: Exploring the Impact of Interface Modification

Kheradmandkeysomi,

Salehi,

Jalali

et al. 2024

ACS Appl. Mater. Interfaces

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In this study, we utilized in situ nanofibrillation of thermoplastic polyester ether elastomer (TPEE) within a high-density polyethylene (HDPE) matrix to enhance the rheological properties, foamability, and mechanical characteristics of the HDPE nanocomposite at both room and subzero temperatures. Due to the inherent polarity differences between these two components, TPEE is thermodynamically incompatible with the nonpolar HDPE. To address this compatibility issue, we employed a compatibilizer, styrene/ethylene-butylene/styrene copolymer-grafted maleic anhydride (SEBS-g-MA), to reduce the interfacial tension between the two blend components. In the initial step, we prepared a 10% masterbatch of HDPE/TPEE with and without the compatibilizer using a twin-screw extruder. Subsequently, we processed the 10% masterbatch further through spun bonding to create fiber-in-fiber composites. Scanning electron microscopy (SEM) analysis revealed a significant reduction in the spherical size of HDPE/TPEE particles following the inclusion of SEBS-g-MA, as well as a much smaller TPEE nanofiber size (approximately 60–70 nm for 5% TPEE). Moreover, extensional rheological testing revealed a notable enhancement in extensional rheological properties, with strain-hardening behavior being more pronounced in the compatibilized nanofibrillar composites compared to the noncompatibilized ones. SEM images of the foam structures depicted substantial improvement in the foamability of HDPE in terms of the cell size and density following the nanofibrillation process and the use of the compatibilizer. Ultimately, the in situ rubber fibrillation and enhancement of HDPE and TPEE interface using a compatibilizer led to increasing the HDPE ductility at room and subzero temperatures while maintaining its stiffness.

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“…Polypropylene was second, with a 32% share of the demand [ 3 ]. Worldwide, the use of polyethylene is increasing at a rate of 12% per year, with the manufacturing of synthetic polymers reaching around 140 million tons per year [ 4 ]. With such a big amount of polyethylene accumulating in the environment, plastic-waste environmental issues arise [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Approach in Biodegradation of Synthetic Thermoplastic Polymers: An Overview

et al. 2022

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Biodegradation is necessary for water-soluble or water-immiscible polymers because they eventually enter streams which can neither be recycled nor incinerated. It is important to consider the microbial degradation of natural and synthetic polymers in order to understand what is necessary for biodegradation and the mechanisms involved. Low/high-density polyethylene is a vital cause of environmental pollution. It occurs by choking the sewer line through mishandling, thus posing an everlasting ecological threat. Environmental pollution due to the unscrupulous consumption of synthetic polymers derived from petroleum has an adverse impact on the environment since the majority of plastics do not degrade, and the further incineration of synthetic plastics generates CO2 and dioxin. This requires understanding the interactions between materials and microorganisms and the biochemical changes involved. Widespread studies on the biodegradation of plastics have been carried out in order to overcome the environmental problems associated with synthetic plastic waste. Awareness of the waste problem and its impact on the environment has awakened new interest in the area of degradable polymers through microbes viz., bacteria, fungi, and actinomycetes. The microbial degradation of plastics is caused by certain enzymatic activities that lead to a chain cleavage of polymers into oligomers and monomers. This review focuses on the biodegradation rate of plastics by fungal and bacterial communities and the mode of action of biodegradation.

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Manufacture and Characterization of Polypropylene (PP) and High-Density Polyethylene (HDPE) Blocks for Potential Use as Masonry Component in Civil Construction

Cited by 7 publications

References 62 publications

Recent Advancements towards Sustainability in Rotomoulding

Recent Advancements towards Sustainability in Rotomoulding

Enhancing Mechanical Performance of High-Density Polyethylene at Different Environmental Conditions with Outstanding Foamability through In-Situ Rubber Nanofibrillation: Exploring the Impact of Interface Modification

Novel Approach in Biodegradation of Synthetic Thermoplastic Polymers: An Overview

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