Mechanical and water absorption properties of sawdust-low density polyethylene nanocomposite

2012 ◽  
Vol 127 (2) ◽  
pp. 1295-1300 ◽  
Author(s):  
Catherine Esnaashari ◽  
Saied Nouri Khorasani ◽  
Mehdi Entezam ◽  
Shahla Khalili
Keyword(s):  
Water Absorption ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Absorption Properties

scholarly journals The Effect of Polymer Waste Addition on the Compressive Strength and Water Absorption of Geopolymer Ceramics

2021 ◽  
Vol 11 (8) ◽  
pp. 3540
Author(s):  
Numfor Linda Bih ◽  
Assia Aboubakar Mahamat ◽  
Jechonias Bidossèssi Hounkpè ◽  
Peter Azikiwe Onwualu ◽  
Emmanuel E. Boakye
Keyword(s):  
Public Health ◽  
Compressive Strength ◽  
Fracture Surface ◽  
Water Absorption ◽  
Chemical Bonding ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Polymer Waste ◽  
Pull Out

The quantity of polymer waste in our communities is increasing significantly. It is therefore necessary to consider reuse or recycling waste to avoid an increase in the risk to public health. This project is aimed at using pulverized low-density polyethylene (LDPE) waste as a source to reinforce and improve compressive strength, and to reduce the water absorption of geopolymer ceramics (GC). Clay:LDPE composition consisting of 5%, 10%, and 15% LDPE was geopolymerized with an NaOH/Na2SiO3 solution and cured at 30 °C and 50 °C. Characterization of the geopolymer samples was carried out using XRF and XRD. The microstructure was analyzed by SEM and chemical bonding by FTIR. The SEM micrographs showed LDPE particle pull-out on the geopolymer ceramics’ fracture surface. The result showed that the compressive strength increases with the addition of pulverized polymer waste compared to the controlled without LDPE addition. Water absorption decreased with an increase in LDPE addition in the geopolymer ceramics composite.

scholarly journals Properties of Low-Cost WPCs Made from Alien Invasive Trees and rLDPE for Interior Use in Social Housing

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2436
Author(s):  
Abubakar Sadiq Mohammed ◽  
Martina Meincken
Keyword(s):  
Tensile Strength ◽  
Water Absorption ◽  
Social Housing ◽  
Low Cost ◽  
Production Costs ◽  
Low Density Polyethylene ◽  
Low Grade ◽  
Low Density ◽  
Invasive Trees ◽  
Recycled Low Density Polyethylene

Low-cost wood–plastic composites (WPCs) were developed from invasive trees and recycled low-density polyethylene. The aim was to produce affordable building materials for low-cost social housing in South Africa. Both raw materials are regarded as waste materials, and the subsequent product development adds value to the resources, while simultaneously reducing the waste stream. The production costs were minimised by utilising the entire biomass of Acacia saligna salvaged from clearing operations without any prior processing, and low-grade recycled low-density polyethylene to make WPCs without any additives. Different biomass/plastic ratios, particle sizes, and press settings were evaluated to determine the optimum processing parameters to obtain WPCs with adequate properties. The water absorption, dimensional stability, modulus of rupture, modulus of elasticity, tensile strength, and tensile moduli were improved at longer press times and higher temperatures for all blending ratios. This has been attributed to the crystallisation of the lignocellulose and thermally induced cross-linking in the polyethylene. An increased biomass ratio and particle size were positively correlated with water absorption and thickness swelling and inversely related with MOR, tensile strength, and density due to an incomplete encapsulation of the biomass by the plastic matrix. This study demonstrates the feasibility of utilising low-grade recycled polyethylene and the whole-tree biomass of A. saligna, without the need for pre-processing and the addition of expensive modifiers, to produce WPCs with properties that satisfy the minimum requirements for interior cladding or ceiling material.

scholarly journals The changes of LD-PE films after exposure in different media

2020 ◽  
Vol 26 (4) ◽  
pp. 185-189
Author(s):  
Tatiana Kojnoková ◽  
Lenka Markovičová ◽  
František Nový
Keyword(s):  
Water Absorption ◽  
Melting Temperature ◽  
Aggressive Medium ◽  
Polyethylene Film ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Experimental Part ◽  
Effective Application ◽  
Suitable Medium ◽  
Selection Of

AbstractThis work deals with the study of polymers, and, in particular, polyethylene; its production, types, properties, and usage. The experimental part evaluates the changes of properties of the polyethylene film to be reused under various exposure conditions and selection of the most suitable medium for its application. The film made of low-density polyethylene (LD-PE) was influenced by aggressive media with different pH, specifically Savo for the disinfection, Savo as a Saponate for dish washing and Coca-Cola. On LD-PE films the water absorption and melting temperature evaluation tests were performed. Carried out tests show that the most aggressive medium for LD-PE film from used media is Coca-Cola. The most effective application of LD-PE film like wrapping on container transported is the Savo used as a Saponate for dish washing.

Investigation of Epoxidized Natural Rubber (ENR 50) as a Compatibilizer on Cogon Grass Filled Low Density Polyethylene/Soya Spent Flour

2014 ◽  
Vol 803 ◽  
pp. 310-316 ◽  
Author(s):  
S.T. Sam ◽  
Nurul Hani ◽  
H. Ismail ◽  
Nik Noriman ◽  
S. Ragunathan
Keyword(s):  
Tensile Strength ◽  
Fourier Transform ◽  
Natural Rubber ◽  
Water Absorption ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Fourier Transform Infrared ◽  
Epoxidized Natural Rubber ◽  
Low Density Polyethylene ◽  
Low Density

Natural fiber reinforced composites are increasingly being used in various applications area. Therefore, the processing method and physical properties of these composites are very important parameters in product quality and quaranty. This paper focused on the tensile properties, Fourier transform infrared (FTIR) and water absorption of cogon grass (CG) with low density polyethylene (LDPE)/soya spent flour (SSF) composites. The tensile strength and elongation at break (Eb) of uncompatibilized CG with LDPE/ SSF decreased significantly with increasing of fiber content. However, the Young’s modulus increased with increasing of CG loading. The presence of epoxidized natural rubber (ENR 50) as a compatibilizer increased the tensile strength, Eband Young’s modulus of the composites when compared to uncompatibilized composites. Fourier transform infrared results show distinguishable peaks for compatibilized and uncompatibilized composites. The water absorption for both uncompatibilized and compatibilized composites increased from day 1 until day 21. The presence of ENR 50 as compatibilizer showed lower water absorption percentage compared to uncompatibilized composites.

Effects of different starch types on the physico-mechanical and morphological properties of low density polyethylene composites

2015 ◽  
Vol 35 (8) ◽  
pp. 793-804 ◽  
Author(s):  
Md. Dalour Hossen Beg ◽  
Shaharuddin Bin Kormin ◽  
Mohd Bijarimi ◽  
Haydar U. Zaman
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Water Absorption ◽  
Starch Content ◽  
Flexural Modulus ◽  
Morphological Properties ◽  
Low Density Polyethylene ◽  
Flow Index ◽  
Low Density ◽  
Sago Starch

Abstract The aim of this research is to investigate the effects of different thermoplastic starches and starch contents on the physico-mechanical and morphological properties of new polymeric-based composites from low density polyethylene (LDPE) and thermoplastic starches. Different compositions of thermoplastic starches (5–40 wt%) and LDPE were melt blended by extrusion and injection molding. The resultant materials were characterized with respect to the following parameters, i.e., melt flow index (MFI), mechanical properties (tensile, flexural, stiffness and impact strength) and water absorption. Scanning electron microscopy (SEM) was also used in this study for evaluating blend miscibility. MFI values of all blends decreased as the starch content increased, while the sago starch formulation showed a higher MFI value than others. The incorporation of fillers into LDPE matrix resulted in an increased in tensile modulus, flexural strength, flexural modulus and slightly decreased tensile strength and impact strength. However, sago starch filled composites exhibited better mechanical properties as compared to other starches. The SEM results revealed that the miscibility of such blends is dependent on the type of starch used. The water absorption increased with immersion time and the thermoplastic sago starch samples showed the lowest percentage of water absorption compared with other thermoplastic starches.

scholarly journals Effect of filler carbonization on agro-waste based ceiling board

2021 ◽  
Vol 13 (2) ◽  
pp. 168781402199440
Author(s):  
Obiora Nnaemeka Ezenwa ◽  
Echezona Nnaemeka Obika ◽  
Onyemazuwa Andrew Azaka ◽  
Emmanuel Chinagorom Nwadike
Keyword(s):  
Thermal Conductivity ◽  
Water Absorption ◽  
Seed Coat ◽  
Compaction Pressure ◽  
Thickness Swell ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Mass Ratio ◽  
Design Expert ◽  
Recycled Low Density Polyethylene

This work presents the use as a filler of carbonized breadfruit seed coat and recycled low density polyethylene as the binder in ceiling board manufacturing. The depulped bread fruit seed was carbonized for 2 h at a temperature of 500°C. The experimental design was set up using the Design Expert software. A total of 30 experimental tests were developed for four parameters and three responses. The parameters are carbonized bread fruit seed coat/recycled Low Density Polyethylene mass ratio (filler-binder mass ratio), compaction time, compaction temperature and compaction pressure while the responses are thermal conductivity, thickness swell and water absorption. The models developed have been validated using the Study of Variance (ANOVA). Using the 3D surface map, the influence of the parameters on the responses was studied. The optimization method of the Design Expert program was used to evaluate the optimal level of the parameters that will produce the best possible result from their combination. The result gave optimal values of 16.206% filler/rLDPE, 9.406minutes compaction time, 200°C compaction temperature and 11 MPa compaction pressure, which gave 0.246% Water Absorption, 1.998% Thickness Swell and 2.898 W/M.K Thermal Conductivity.

scholarly journals Manufacturing of Bathroom Wall Tile Composites from Recycled Low-Density Polyethylene Reinforced with Pineapple Leaf Fiber

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Negasi Gebremedhin ◽  
Gideon K. Rotich
Keyword(s):  
Water Absorption ◽  
Fiber Length ◽  
Natural Fiber ◽  
Low Cost ◽  
Wall Tile ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Melt Mixing ◽  
Weight Proportion ◽  
Recycled Low Density Polyethylene

Plastic has been a dominant material for packaging in recent years but due to its nonbiodegradability, it is causing environmental pollution. Among the plastics used, low-density polyethylene is used abundantly. These plastics can be removed from the environment by recycling into useful products through reinforcing it with natural textile fibers into composite materials. Natural fiber-based composites are ecofriendly and low cost. This research is aimed at manufacturing composite wall tiles from recycled low-density polyethylene reinforced with pineapple leaf fibers (PALF). The PALF was extracted by the retting process followed by mechanical scratching and treated with 5% NaOH to improve the fiber-matrix interaction. The composites were manufactured by the melt-mixing method followed by compression molding. The effects of fiber length and fiber weight proportion on composite properties were investigated using tensile, flexural, impact, and water absorption tests. The study showed that the optimum fiber weight proportion and fiber length for the optimal properties of the composite were achieved at 30% fiber weight proportion and 30 mm fiber length. The maximum tensile strength of 1562 N/mm2, flexural strength of 454.9 N/mm2, and impact strength of 225.2 J/mm2 were obtained. Water absorption of the tiles increased with the increase in both the fiber weight proportion and the fiber length.

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