Physical and Mechanical Properties of Wood-Plastic Composites Made with Microfibrillar Blends of LDPE, HDPE and PET

Mosavi-Mirkolaei, Seyyedeh Tahereh; Najafi, Saeed Kazemi; Tajvidi, Mehdi

doi:10.1007/s12221-019-1089-9

Cited by 18 publications

(10 citation statements)

References 36 publications

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“…It has often been reported in the literature that the properties of WPCs/NFPCs depend strongly on their composition and manufacturing techniques [78][79][80][81][82][83][84]. In every study shown in Table 1, different base/reference materials are considered; therefore, we may expect variations in the properties observed.…”

Section: Improvement Of Wpc/nfpc Performance By the Addition Of Carbo...mentioning

confidence: 99%

Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene

et al. 2022

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Carbon nanotubes (CNTs) and graphene, with their unique mechanical, electrical, thermal, optical, and wettability properties, are very effective fillers for many types of composites. Recently, a number of studies have shown that CNTs and graphene may be integrated into wood–plastic composites (WPCs) and natural-fibre-reinforced polymer composites (NFPCs) to improve the existing performance of the WPCs/NFPCs as well as enabling their use in completely new areas of engineering. The following review analyses the results of the studies presented to date, from which it can be seen that that inclusion of CNTs/graphene may indeed improve the mechanical properties of the WPCs/NFPCs, while increasing their thermal conductivity, making them electroconductive, more photostable, less sensitive to water absorption, less flammable, and more thermally stable. This study indicates that the composition and methods of manufacturing of hybrid WPCs/NFPCs vary significantly between the samples, with a consequent impact on the level of improvement of specific properties. This review also shows that the incorporation of CNTs/graphene may enable new applications of WPCs/NFPCs, such as solar thermal energy storage devices, electromagnetic shielding, antistatic packaging, sensors, and heaters. Finally, this paper recognises key challenges in the study area, and proposes future work.

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Section: Improvement Of Wpc/nfpc Performance By the Addition Of Carbo...mentioning

confidence: 99%

Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene

et al. 2022

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“…Among the proposals in the RevalPET project, the use of rPET-O as reinforcer in microfibrillar form of a recycled polypropylene (rPP) matrix has been explored. Because of the immiscibility between these polymers and their different melting temperatures, T m , the selection of processing conditions was considered in order to favor an in situ microfibrillation process, induced during the preparation of the blend and subsequent shaping of piece in order to generate microfibril reinforced composites (MFCs) [ 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Extruded-Calendered Sheets of Fully Recycled PP/Opaque PET Blends: Mechanical and Fracture Behaviour

et al. 2021

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This work presents the experimental results of the mechanical and fracture behaviour of three polymeric blends prepared from two recycled plastics, namely polypropylene and opaque poly (ethylene terephthalate), where the second one acted as a reinforcement phase. The raw materials were two commercial degrees of recycled post-consumer waste, i.e., rPP and rPET-O. Sheets were manufactured by a semi-industrial extrusion-calendering process. The mechanical and fracture behaviours of manufactured sheets were analyzed via tensile tests and the essential work of fracture approach. SEM micrographics of cryofractured sheets revelated the development of in situ rPP/rPET-O microfibrillar composites when 30 wt.% of rPET-O was added. It was observed that the yield stress was not affected with the addition of rPET-O. However, the microfibrillar structure increased the Young’s modulus by more than a third compared with rPP, fulfilling the longitudinal value predicted by the additive rule of mixtures. Regarding the EWF analysis, the resistance to crack initiation was highly influenced by the resistance to its propagation owing to morphology-related instabilities during tearing. To analyze the initiation stage, a partition energy method was successfully applied by splitting the total work of fracture into two specific energetic contributions, namely initiation and propagation. The results revelated that the specific essential initiation-related work of fracture was mainly affected by rPET-O phase. Remarkably, its value was significantly improved by a factor of three with the microfibrillar structure of rPET-O phase. The results allowed the exploration of the potential ability of manufacturing in situ MFCs without a “precursor” morphology, providing an economical way to promote the recycling rate of PET-O, as this material is being discarded from current recycling processes.

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“…Currently, WPC is widely used in construction engineering, automobile interior decoration, garden decoration, packaging transportation, and the aerospace industry. [7][8] The research on WPC is mainly focused on changing the types of matrix [9][10][11] and fiber materials, the proportion of each other, [12] the type of additives, and the research and development of processing technology, the purpose of which is to improve WPC flame retardancy, [13] weather resistance, [14] and mechanical properties. [15][16] There are no relevant reports on the systematic study of the WPC axial stress-strain relationship, and when calculating the bearing capacity of WPC members under tension, compression, and bending loads, the calculation model of the stress-strain relationship is of significance as the theoretical basis.…”

Section: Introductionmentioning

confidence: 99%

Calculation model for uniaxial stress–strain relationship of wood plastic composites

Zhao

Wang

2021

Polymer Composites

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This paper presents an investigation on the mechanical properties of wood plastic composites under uniaxial stress. Experimental studies of test pieces with tensile and compressive load were performed. Failure modes, stressstrain relationship, and other crucial parameters were recorded and analyzed.The results indicated that brittle failure was the typical failure mode of the tensile test specimens, however, shear-compression failure and wedge double shear failure were commonly observed for samples under compressive load.Mechanical properties of WPC are better than those of timber according to different national standards. Different analytical models were proposed for evaluating the stress-strain response of the specimens. The fitting between the experimental results and calculations was good.

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Physical and Mechanical Properties of Wood-Plastic Composites Made with Microfibrillar Blends of LDPE, HDPE and PET

Cited by 18 publications

References 36 publications

Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene

Enriching WPCs and NFPCs with Carbon Nanotubes and Graphene

Extruded-Calendered Sheets of Fully Recycled PP/Opaque PET Blends: Mechanical and Fracture Behaviour

Calculation model for uniaxial stress–strain relationship of wood plastic composites

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