Thermal, Mechanical and Rheological Properties of Low Density/Linear Low Density Polyethylene Blend for Packing Application

Products, F. Al-Attar$Polymeric; Program, Customization; City, Kuwait; Products, Kuwait╃M. Alsamhan$Polymeric; Products, Kuwait╃A. Al-Banna$Polymeric; Products, Kuwait╃J. Samuel$Polymeric; Kuwait,

doi:10.4236/msce.2018.61005

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…And because there is no long branch chain entangled with each other, the viscosity of LLDPE does not change much during processing, which makes LLDPE more suitable for film production than HDPE and LDPE. In addition, LLDPE can also be combined with a variety of antioxidants to prepare PE films with high ultraviolet stability, improving the photoelectric properties of the material [18].Finally, LLDPE can not only be used as a raw material for the production of films, but also as a filler to improve the mechanical properties of LDPE and PP [19,20].…”

Section: Applicationmentioning

confidence: 99%

A comprehensive review of synthesis, properties and modification of several common polyethylenes

Dai

Meng

et al. 2023

Eighth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2022)

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Polyethylene (PE) has good chemical stability and corrosion resistance and is one of the top five synthetic resins, widely used in the manufacture of films and fibers. However, with the development of society, simple PE products can no longer meet people's demands for performance. This article describes the performance, production methods, and several methods and effects of PE modification of different kinds of PE. The performance of PE is related to the way it is processed and the length of its branches and the number of branches. The shorter the length of the branch chain, the less the number of long branch chains and short branch chains, the higher the density, the stronger the crystallinity, the higher the tensile strength, the tensile modulus, and hardness, and the higher the melting point. The larger the molecular weight, the more branched chains, the tighter the entanglement between the molecular chains, and the greater the viscosity of the material. The fewer the branch chains, the shorter the length of the branch chains, and the lower the pressure and temperature required for processing. In the third part, this article describes the enhanced interface compatibility of materials, improved processing properties, reduced costs, and improved mechanical properties such as compliance and stress cracking by physical modification (blending modification, filling modification, enhanced modification) and chemical modification (crosslinking modification, graft modification, copolymerization modification). It also describes new modified technologies such as metallocene catalysis and nanomaterial filling that improve material properties while becoming more environmentally friendly. This paper expects to be able to develop PE materials that meet social needs based on the specific properties of PE and the way of modification, guided by different needs for materials.

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Section: Applicationmentioning

confidence: 99%

A comprehensive review of synthesis, properties and modification of several common polyethylenes

Dai

Meng

et al. 2023

Eighth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2022)

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“…There is an abundance of published literature focusing on the use of recycled plastics, investigating polyolefin blends such as PE and PP (both virgin and recycled) [6][7][8][9][10][11][12][13][14][15][16], and studying the properties of various blends of virgin and recycled PE [17][18][19][20][21][22][23][24][25][26][27][28]. However, there is a noticeable gap in the literature characterising waste mixed plastics comprising of different grades of PEs and PPs of unknown composition.…”

Section: Introductionmentioning

confidence: 99%

“…Al-Attar [17] investigated virgin LDPE/LLDPE (vLDPE/vLLDPE) blends. The study showed that incorporating vLLDPE into vLDPE results in higher mechanical properties than vLDPE alone.…”

Section: Introductionmentioning

confidence: 99%

Diverted from Landfill: Reuse of Single-Use Plastic Packaging Waste

O’Rourke

Wurzer

Murray³

et al. 2022

Polymers

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Low-density polyethylene (LDPE) based packaging films mostly end up in landfill after single-use as they are not commonly recycled due to their flexible nature, low strength and low cost. Additionally, the necessity to separate and sort different plastic waste streams is the most costly step in plastics recycling, and is a major barrier to increasing recycling rates. This cost can be reduced through using waste mixed plastics (wMP) as a raw material. This research investigates the properties of PE-based wMP coming from film packaging wastes that constitutes different grades of PE with traces of polypropylene (PP). Their properties are compared with segregated individual recycled polyolefins and virgin LDPE. The plastic plaques are produced directly from the wMP shreds as well as after extruding the wMP shreds into a more uniform material. The effect of different material forms and processing conditions on the mechanical properties are investigated. The results of the investigation show that measured properties of the wMP fall well within the range of properties of various grades of virgin polyethylene, indicating the maximum possible variations between different batches. Addition of an intermediate processing step of extrusion before compression moulding is found to have no effect on the tensile properties but results in a noticeably different failure behaviour. The wMP does not show any thermal degradation during processing that was confirmed by thermogravimetric analysis. The results give a scientific insight into the adoption of wMP in real world products that can divert them from landfill creating a more circular economy.

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“…Despite the benefits of LDPE/LLDPE blends in film applications, blend miscibility, and the miscibility of LDPE/LLDPE blends have certain effects on their properties, and few studies have been conducted on the miscibility of LDPE/LLDPE blends [ 3 , 4 , 5 , 6 ]. Most researchers have reported that LLDPE/LDPE blends are miscible at low LDPE contents and show immiscibility at higher LDPE [ 7 ]. In this study, the LDPE concentrations were kept low, and the differential scanning calorimetry (DSC) thermograms exhibited two overlapping peaks, which may be due to the phase separation of the LDPE and LLDPE components in the blended film after crystallization [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Blown Composite Films of Low-Density/Linear-Low-Density Polyethylene and Silica Aerogel for Transparent Heat Retention Films and Influence of Silica Aerogel on Biaxial Properties

et al. 2022

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Blown films based on low-density polyethylene (LDPE)/linear low-density polyethylene (LLDPE) and silica aerogel (SA; 0, 0.5, 1, and 1.5 wt.%) were obtained at the pilot scale. Good particle dispersion and distribution were achieved without thermo oxidative degradation. The effects of different SA contents (0.5–1.5 wt.%) were studied to prepare transparent-heat-retention LDPE/LLDPE films with improved material properties, while maintaining the optical performance. The optical characteristics of the composite films were analyzed using methods such as ultraviolet–visible spectroscopy and electron microscopy. Their mechanical characteristics were examined along the machine and transverse directions (MD and TD, respectively). The MD film performance was better, and the 0.5% composition exhibited the highest stress at break. The crystallization kinetics of the LDPE/LLDPE blends and their composites containing different SA loadings were investigated using differential scanning calorimetry, which revealed that the crystallinity of LDPE/LLDPE was increased by 0.5 wt.% of well-dispersed SA acting as a nucleating agent and decreased by agglomerated SA (1–1.5 wt.%). The LDPE/LLDPE/SA (0.5–1.5 wt.%) films exhibited improved infrared retention without compromising the visible light transmission, proving the potential of this method for producing next-generation heat retention films. Moreover, these films were biaxially drawn at 13.72 MPa, and the introduction of SA resulted in lower draw ratios in both the MD and TD. Most of the results were explained in terms of changes in the biaxial crystallization caused by the process or the influence of particles on the process after a systematic experimental investigation. The issues were strongly related to the development of blown nanocomposites films as materials for the packaging industry.

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Thermal, Mechanical and Rheological Properties of Low Density/Linear Low Density Polyethylene Blend for Packing Application

Cited by 4 publications

References 7 publications

A comprehensive review of synthesis, properties and modification of several common polyethylenes

A comprehensive review of synthesis, properties and modification of several common polyethylenes

Diverted from Landfill: Reuse of Single-Use Plastic Packaging Waste

Blown Composite Films of Low-Density/Linear-Low-Density Polyethylene and Silica Aerogel for Transparent Heat Retention Films and Influence of Silica Aerogel on Biaxial Properties

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