Recycling and Reusing Polyethylene Waste as Antistatic and Electromagnetic Interference Shielding Materials

The aim of this work is to manage the waste product based on polyethylene (PE) films by recycling and reusing it as antistatic material for electronic packaging and electromagnetic interference (EMI) shielding material for protecting electronic equipment from interference of EM radiation. To achieve this, a conductive carbon black has been mixed with the PE waste at different weight percent values by ultrasonication via a solution mixing process. Mixing time for sonication was determined by ultraviolet-visible (UV-VIS) spectra. A differential scanning calorimetry (DSC) study showed that the low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE) are immiscible in their blend composition. The tensile properties of PE have reduced substantially after reprocessing. However, the addition of carbon black has improved its strength up to a certain loading. The electrical percolation threshold values, calculated using the classical power law and sigmoidal Boltzmann model, were obtained at 3.5 and 2.8 wt% loading of carbon black, respectively. The conductivity result revealed that 1-2 wt% carbon-loaded composites can be used as antistatic material. The composites, having carbon loading above 4 wt%, can be effective materials for EMI shielding application. The 10 wt% carbon-loaded composite exhibits EMI SE value 33 dB which means there is approximately 99.93% protection of EM radiation at the sample thickness of 1.0 mm. Moreover, FTIR analysis, thermal stability, AC conductivity, dielectric properties, permeability, and current-voltage characteristics are also discussed in detail. There is a substantial increment in thermal stability, and dielectric properties are observed with the addition carbon black loading within the polymer matrix.

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Thermal Properties of Linear-Low Density Polyethylene (LLDPE)/Soya Spent Powder Blends with the Addition of Epoxidised Natural Rubber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.795.433 ◽

2013 ◽

Vol 795 ◽

pp. 433-437 ◽

Cited By ~ 1

Author(s):

S.T. Sam ◽

N.Z. Noriman ◽

S. Ragunathan ◽

O.H. Lin ◽

H. Ismail

Keyword(s):

Thermal Properties ◽

Natural Rubber ◽

Mixing Time ◽

Low Density Polyethylene ◽

Low Density ◽

Linear Low Density Polyethylene ◽

Scanning Calorimetry ◽

Powder Composites ◽

Powder Content ◽

Internal Mixer

Soya spent powder as an inexpensive and renewable source has been used as a filler for linear-low density polyethylene (LLDPE) in this study. Linear-low density polyethylene (LLDPE)/soya spent powder composites were prepared by using Haake internal mixer. The mixing time was 10 minutes at 150°C with rotor speed 50 rpm. Epoxidised natural rubber (ENR 50) has been used as a compatibilizer in the present study. The thermal properties of the LLDPE/soya spent powder composites with and without ENR were studied with a differential scanning calorimetry (DSC). The crystallinity of the LLDPE/soya spent powder composites decreased with increasing soya spent powder content. However, the addition of ENR 50 as a compatibilizer increased the crystallinity of the LLDPE/soya spent powder composites.

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Thermal and dielectric properties evaluation of low density polyethylene - Boron Nitride - Carbon Black nanocomposites

2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) ◽

10.1109/ceidp.2015.7352150 ◽

2015 ◽

Cited By ~ 1

Author(s):

H. Couderc ◽

M. Frechette ◽

E. David

Keyword(s):

Dielectric Properties ◽

Boron Nitride ◽

Carbon Black ◽

Low Density Polyethylene ◽

Low Density

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Characteristic of low-density polyethylene reinforcement with nano/micro particles of carbon black: a comparative study

Archives of Materials Science and Engineering ◽

10.5604/01.3001.0015.4312 ◽

2021 ◽

Vol 2 (110) ◽

pp. 49-58

Author(s):

O.H. Sabr ◽

N.H. Al-Mutairi ◽

A.Y. Layla

Keyword(s):

Mechanical Properties ◽

Thermal Conductivity ◽

Thermal Stability ◽

Tensile Strength ◽

Elastic Modulus ◽

Carbon Black ◽

Uniform Distribution ◽

Low Density Polyethylene ◽

Low Density ◽

Carbon Black Nanoparticles

Purpose: Low density polyethylene is commonly used polymer in the industry because of its unique structure and excellent overall performance. LDPE, is relatively low mechanical properties and thermal stability can sometimes limit its application in industry. Therefore, the development of particulate reinforced polymer composites is one of the highly promising methodologies in the area of next generation engineering products. Design/methodology/approach: Nano and Micro composite from low density polyethylene LDPE reinforced with different weight fraction of carbon black particles (CB) (2, 4 and 8)% prepared by first dispersion Nano and Micro carbon black particles CB in solvent and then mixing manually with low density polyethylene LDPE pellet and blended by twin-screw extruder, the current research study the mechanical properties (tensile strength, elastic modulus,and hardness), FTIR, DSC,and thermal conductivity of prepared nano and micro composites using two methodes and the morphological properties of nano-micro composites. Findings: The tensile strength of the LDPE/CB nano and micro composites improved at 2% and 4%, respectively, and decreasing at 8%, addition of carbon black nanoparticles led to increase the tensile strength of pure low-density polyethylene from 13.536 MPa to 19.71 MPa, and then dropping to 11.03 MPa at 8% percent,while the elastic modulus of LDPE/ CB nano and miro composites shows an improvement with all percentages of CB. The results show that the mechanical properties were improved by the addition carbon black nanoparticles more than addition micro- carbon black . FTIR show that physical interaction between LDPE and carbon black. The thermal conductivity improvement from 0.33 w/m.k for pur LDPE to 0.62234 w/m.k at 2% CB microparticle content and the reduced to 0.18645 w/m.k and 0.34063 w/m.k at (4 and 8)% micro-CB respectively , The thermal conductivity of LDPE-CB nano-composites is low in general than that the LDPE-CB microcomposite. DSC result show improvement in crystallization temperature Tc, melting temperature and degree of crystallization with addition nano and micro carbon black. Morever, SEM images revealed to uniform distribution and good bonding between LDPE and CB at low percentages and the precence of some agglomeration at high CB content.Research limitations/implications: This research studied the characteristics of both nano and micro composite materials prepared by two steps: mixing CB particles with solvent and then prepared by twin extruder which can be used packaging material, but the main limitation was the uniform distribution of nano and micro CB particles within the LDPE matrix. In a further study, prepare a blend from LDPE with other materials and improve the degradation of the blend that used in packaging application. Originality/value: LDPE with nanocomposites are of great interest because of their thermal stability, increased mechanical strength, stiffness, and low gas permeability, among other properties that have made them ideal for applications in the packaging and automotive industries. LDPE reinforcements nano-sized carbon black can have better mechanical and thermal properties than micron, resulting in less material being needed for a given application at a lower cost.

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Thermal properties of novel clay containing nanocomposites based on low density polyethylene/ ethylene-octene copolymer blends

e-Polymers ◽

10.1515/epoly.2009.9.1.986 ◽

2009 ◽

Vol 9 (1) ◽

Author(s):

Bahareh Baghaei ◽

Seyed Hassan Jafari ◽

Hossein Ali Khonakdar ◽

Ladan Ashabi

Keyword(s):

Thermal Stability ◽

Thermal Analysis ◽

Thermal Properties ◽

Clay Content ◽

Low Density Polyethylene ◽

Low Density ◽

Scanning Calorimetry ◽

Dynamic Mechanical ◽

Melt Compounding ◽

Ethylene Octene Copolymer

AbstractThermal behaviour of low-density polyethylene (LDPE)/ ethylene-octene copolymer (POE)/ organo-montmorillonite (org-MMT) nanocomposites, prepared via melt compounding were studied by means of differential scanning calorimetry (DSC), thermogravimetry analysis (TGA) and dynamic mechanical thermal analysis (DMTA) techniques. These nanocomposites showed different levels of intercalated structures depending on clay content, blend composition and compatibilization. Addition of polyethylene grafted maleic anhydride (PE-g-MA), as a compatibilizer, improved the intercalation process. The nanocomposites with 5% org-MMT and 5% PE-g-MA showed improved storage modulus and thermal stability in dynamic mechanical and thermal analysis, respectively. The degradation trends of nanocomposites were almost similar to the neat blends in nitrogen environment, but in air atmosphere thermal stability of the nanocomposites increased. The DSC results showed that the org-MMT layers dispersed in the nanocomposites could act as nucleation agents for the crystallization of the LDPE matrix. The results indicated that clay dispersion and interfacial adhesion, and consequently thermal properties of nanocomposites, are greatly affected by addition of PE-g-MA.

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Nano-Cu/Low-Density Polyethylene Composites: Structure and Control Release of Cupric Ions

Materials Science Forum ◽

10.4028/www.scientific.net/msf.848.72 ◽

2016 ◽

Vol 848 ◽

pp. 72-76

Author(s):

Yu Qiu ◽

Hua Lei ◽

Tao Xu

Keyword(s):

Thermal Stability ◽

Intrauterine Device ◽

Control Release ◽

Low Density Polyethylene ◽

Release Time ◽

Burst Release ◽

Low Density ◽

Scanning Calorimetry ◽

Blending Method ◽

Polyethylene Composites

In recent years a new type of intrauterine device (nanoCu/LDPE composites) has been concerned by a lot of scholars for its short release time, high bioavailability and good biocompatibility. In this study nanoCu/low-density polyethylene composites were prepared by extruding mixtures of pure LDPE and nanoCu using melt-blending method, the release rate of cupric ions (Cu2+) was measured in simulated uterine fluid. The non-isothermal crystallization behavior and thermal stability of the composites before and after immersion were studied by differential scanning calorimetry (DSC) and thermogravimetric analyzer (TG). The results showed that Composites effectively shorten the time of the copper ion "burst release" , the burst release phenomenon of Cu2+ occurred during the first five days after immersion , and then tend to stable . By immersion the crystallinity of composites increased, and the thermal stability decreased.

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Electromagnetic interference of nickel ferrite and copper ferrite filled low-density polyethylene composite

Journal of Composite Materials ◽

10.1177/0021998320938836 ◽

2020 ◽

Vol 54 (30) ◽

pp. 4799-4806 ◽

Cited By ~ 1

Author(s):

Kriti Vaid ◽

Deepshikha Rathore ◽

Umesh Kumar Dwivedi

Keyword(s):

Electromagnetic Interference ◽

Nickel Ferrite ◽

Low Density Polyethylene ◽

Copper Ferrite ◽

Low Density ◽

Shielding Effectiveness ◽

Emi Shielding ◽

Melt Mixing ◽

Ph Values ◽

Emi Shielding Effectiveness

This study reports the preparation of nickel ferrite (NiFe2O4) and copper ferrite (CuFe2O4) filled low-density polyethylene (LDPE) composite through a melt mixing process for employing in electromagnetic shielding applications. The X-Ray diffraction (XRD) with different pH values 6, 8 and 10 resulted the formation of cubic structure for NiFe2O4 of cristallite size 21 nm, 25 nm and 40 nm, respectively and tetragonal structure for CuFe2O4 with crystallite size 27 nm, 24 nm and 91 nm, respectively. Electromagnetic interference (EMI) shielding measurements of the prepared samples LDPE/NiFe2O4 and LDPE/CuFe2O4 having different pH values 6, 8 and, 10 for 10% and 30% filler concentrations were analyzed over X-band with a frequency range from 8 GHz to 12.4 GHz. The pure LDPE exhibits the total shielding effectiveness (SE) of 11.6 dB whereas with the addition of NiFe2O4 and CuFe2O4, the composites exhibit increment in EMI shielding effectiveness up to the maximum value of 15.3 dB for LDPE/NiFe2O4 and 12.6 dB for LDPE/CuFe2O4 respectively.

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Preparing and Applying of Flame Retardant Microcapsules Containing Magnesium Hydroxide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.2191 ◽

2013 ◽

Vol 734-737 ◽

pp. 2191-2194

Author(s):

Li Li Wu ◽

Yuan Lian ◽

Dan Liu ◽

Hua Zheng ◽

Dian Wu Huang

Keyword(s):

Thermal Stability ◽

Flame Retardant ◽

Magnesium Hydroxide ◽

Low Density Polyethylene ◽

Core Shell ◽

Low Density ◽

Melamine Resin ◽

Shell Material ◽

Elongation At Break ◽

Good Thermal Stability

In this study, flame retardant microcapsules were synthesized using magnesium hydroxide as core materials, melamine resin as the shell material. The structure, diameters and thermal properties of prepared microcapsules were investigated by using FTIR, ELS, DSC and TGA. The effects of core/shell ratio on the properties of microcapsules were studied.Flame retardant materials of low-density polyethylene/magnesium hydroxide microcapsules were prepared.The tensile strength and elongation at break tests were performed to determine its mechanical property.Inflammability of the materials was also studied.The results showed the prepared magnesium hydroxide microcapsule shows good thermal stability and it has free compatibility with the polymer.The composites of HDPE/MH microcapsules have good performance．

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