scholarly journals Fabrication of raw and oxidized saw dust reinforced low density polyethylene (LDPE) composites and investigation of their physico-mechanical properties

2013 ◽  
Vol 47 (4) ◽  
pp. 365-372 ◽  
Author(s):  
S Sultana ◽  
HP Nur ◽  
T Saha ◽  
M Saha
Keyword(s):  
Mechanical Properties ◽  
Mangifera Indica ◽  
Flexural Modulus ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Saw Dust ◽  
Ldpe Composites ◽  
Scanning Electron

In this research work, cellulosic waste mango (Mangifera indica) saw dust used as the reinforcing material with low density polyethylene (LDPE). A number of samples of saw dust reinforced low density polyethylene (LDPE) composites were prepared by compression moulding technique. In order to improve the mechanical properties of saw dust-LDPE composites, unbleached raw saw dust fibers were modified by oxidation using sodium hypochlorite. FT-IR spectroscopic and scanning electron micrograph (SEM) analyses were done and the results showed the evidence of positive oxidation reaction. The effects of oxidized saw dust on the performance of oxidized saw dust reinforced LDPE composites were studied comparing with the raw saw dust-LDPE composites. The effects of fiber content on the physico-mechanical properties of composites were also studied by preparing the composites with different percentage of fiber loading (from 7.5 wt% to 30 wt%) for each type of composite. Mechanical properties such as tensile strength, tensile modulus, elongation at break, flexural strength, flexural modulus of the resulting composite were measured. Better results were obtained from oxidized saw dust-LDPE composites. Scanning electron micrograph and water absorption tests were carried out for all composites and improved results were found for oxidized saw dust-LDPE composites. Bangladesh J. Sci. Ind. Res. 47(4), 365-372, 2012 DOI: http://dx.doi.org/10.3329/bjsir.v47i4.14065

Compatibility of Lignin/LDPE Composites Modified with HDPE-G-MAH

2011 ◽  
Vol 181-182 ◽  
pp. 88-91 ◽  
Author(s):  
Xin Ying Lv ◽  
Qiang Liu ◽  
Yan Hua Zhang ◽  
Ming Wei Di
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Weight Ratio ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Interfacial Bonding Strength ◽  
Ldpe Composites ◽  
Chinese Standard ◽  
Compatibilizing Agent ◽  
Scanning Electron

Lignin have been blended with low density polyethylene (LDPE). Maleic anhydride grafted high density polyethylene (HDPE-g-MAH) has been added as compatibilizing agent. The weight ratio of LDPE, ligin and HDPE-a-MAH were 75:25:7.5, 75:25:10 and 75:25:12.5, respectively. The mechanical properties of the blends were investigated according to Chinese standard GB/1447-2005 and compared with those of lignin/LDPE composites without compatibilizing agent. Scanning electron microscopy (SEM) was used to investigate the dispersion of the lignin and LDPE and the compatibilizing mechanism was analyzed. The results reveal that addition of compatibilizing agent increased the interfacial bonding strength of the composites, improved the mechanical properties and obtained the better dispersion of the lignin and LDPE.

Effect Of PP-G-MAH on the Compatibility of Lignin/LDPE Composites

2011 ◽  
Vol 194-196 ◽  
pp. 1476-1479 ◽  
Author(s):  
Xin Ying Lv ◽  
Yan Hua Zhang ◽  
Ming Wei Di
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Weight Ratio ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Interfacial Bonding Strength ◽  
Ldpe Composites ◽  
Chinese Standard ◽  
Compatibilizing Agent ◽  
Scanning Electron

Lignin have been blended with low density polyethylene (LDPE). Maleic anhydride grafted polypropylene (PP-g-MAH) has been added as compatibilizing agent. The weight ratio of LDPE, ligin and PP-a-MAH were 75:25:5, 75:25:7.5 and 75:25:10, respectively. The mechanical properties of the blends were investigated according to Chinese standard GB/1447-2005 and compared with those of lignin/LDPE composites without compatibilizing agent. Scanning electron microscopy (SEM) was used to investigate the dispersion of the lignin and LDPE and the compatibilizing mechanism was analyzed. The results reveal that addition of compatibilizing agent increased the interfacial bonding strength of the composites, improved the mechanical properties and obtained the better dispersion of the lignin and LDPE.

Effects of microcrystalline cellulose on the mechanical properties of low-density polyethylene composites

2018 ◽  
Vol 32 (3) ◽  
pp. 297-311 ◽  
Author(s):  
Yousef Ahmad Mubarak ◽  
Raghda Talal Abdulsamad
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Impact Strength ◽  
Tensile Properties ◽  
Microcrystalline Cellulose ◽  
Weight Fraction ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Ldpe Composites ◽  
The Impact

This work was intended to provide an understanding of the effect of microcrystalline cellulose (MCC) on the mechanical properties of low-density polyethylene (LDPE). The impact resistance and the tensile properties of low-density LDPE/MCC composites were investigated. The weight fraction of MCC was varied at (0, 0.5, 1, 2.5, 5, 10, 20, and 30 wt%). The obtained blends were then used to prepare the required tensile and impact testing samples by hot compression molding technique. It has been found that MCC has a strong influence on the mechanical properties of LDPE. At a low MCC weight fraction, there was a little improvement in the ultimate strength, fracture stress, and elongation at break, but at a high MCC weight fraction, the tensile properties were deteriorated and reduced significantly. The addition of 1 wt% MCC to LDPE enhanced the mentioned properties by 10, 25, and 6%, respectively. While at 30 wt% MCC, these properties were lowered by 36, 25, and 96%. The elastic modulus of LDPE composites was improved on all MCC weight fractions used in the study, at 20 wt% MCC, an increase in the elastic modulus by 12 folds was achieved. On the other hand and compared with the impact strength of pure LDPE, the addition of MCC particles enhanced the impact strength, the highest value obtained was for LDPE composites filled with 10 wt% MCC where the impact strength enhanced by two folds.

Biodegradation of Low Density Polyethylene (LDPE) Composite Filled with Cellulose and Cellulose Acetate

2014 ◽  
Vol 896 ◽  
pp. 314-317 ◽  
Author(s):  
Halimatuddahliana ◽  
Ahmad Mulia Rambe
Keyword(s):  
Weight Loss ◽  
Cellulose Acetate ◽  
The Other ◽  
Low Density Polyethylene ◽  
Processing Temperature ◽  
Low Density ◽  
Open Environment ◽  
Ldpe Composites ◽  
Scanning Electron ◽  
Microbial Attack

A comparative study was conducted for the biodegradation of low density polyethylene (LDPE) composites filled with cellulose (C) and cellulose acetate (CA). Composites were prepared with the content of each filler of 10% (by weight) using an extruder at processing temperature of 125°C.Biodegradation processes were done by burying in the soil and by hanging in an open environment for four months. The percentage of weight loss of pure LDPE and composites due to the degradation were observed based on the weight reduction of the composites and supported by scanning electron microscopy (SEM). The results indicated pure LDPE was not susceptible to microbial attack as the percentage of weight loss were constant. However, the composites filled with cellulose were relatively more susceptible to degradation as compared with composites filled cellulose acetate. Here, the percentage of weight loss of composites filled cellulose were higher than the composites filled cellulose acetate. On the other hand, the biodegradation processes by hanging in open environment were relatively faster than burying in soil for both types of composites. These results were confirmed by SEM which have shown some cavities.

Mechanical Properties of Natural Fibers Reinforced Polymer Composites: Palm/Low Density Polyethylene

2016 ◽  
Vol 869 ◽  
pp. 326-330
Author(s):  
Julia R. Guedes ◽  
Wagner Martins Florentino ◽  
Luciano Monteiro Rodrigues ◽  
Claudinei dos Santos ◽  
Daniella Regina Mulinari
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Natural Fibers ◽  
Polymeric Matrix ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Pure Polymer ◽  
Reinforced Polymer ◽  
Tensile Impact ◽  
Ldpe Composites

In the work, mechanical properties of palm fibers/low density polyethylene (LDPE) composites were studied. These fibers were mixed with the polymeric matrix (LDPE) in a thermokinetic mixer, in which fibers were responsible for 5 to 20 wt% in the composition. After the mixture, composites were dried, ground in mill and placed in an injector camera according to ASTM D-638 and ASTM D-790 specifications. Specimens were tested in tensile, impact, flexural and Shore A hardness mode. Results showed the addition fibers in polymeric matrix presented increase mechanical properties when compared to pure polymer

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.

Quantitative Separation of NMR Signal Amplitude of Water in Wood on the Basis of T2

2011 ◽  
Vol 704-705 ◽  
pp. 552-557
Author(s):  
Da Yan Ma ◽  
Xi Ming Wang ◽  
Ming Hui Zhang ◽  
Xue Qi Li
Keyword(s):  
Mechanical Properties ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Water Content ◽  
Water Distribution ◽  
Physical And Mechanical Properties ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Scanning Electron ◽  
Nuclear Magnetic

As a kind of crude and green material, wood is essential to human life. Meanwhile, the amount of water played a vital role to almost all engineering properties of wood. Moisture affects dimensional stability, physical and mechanical properties, and susceptibility toward biological degradation. Consequently, it provides a theoretical basis for the reasonable drying model to explore the water assignment and content in timber. we present here the application of a nuclear magnetic resonance technique, which is used to quantitatively analyse water distribution in wood on the basis of T2. In this paper, we will analyse the water distribution in hardwood on the basis of T2. Refer to the scanning electron micrographs of the hardwood, we can speculate the relaxation time of the water in different cell lumens respectively. Moreover, it is even more important to calculate the organic proportion in wood by the corresponding amplitude of signal derived from the water in different cell lumens. This, compared with a scanning electron micrograph, has allowed us to produce a assumable distribution of water in wood, even the corresponding organic proportion in wood, which allows us to speculate physical and mechanical properties of wood. A mobile NMR probe has been used as a non-destructive and non-invasive tool for water content analysis on wood samples. In this paper, we will adopt NMR methods to explain. This, has opened up a way for the accurate determination of the moisture content of wood, even can be applied to the areas of food and so on. Keywords: Nuclear magnetic resonance; Water distribution in wood; T2; Scanning electron micrograph; Water content

Effect of Interface Improving on Morphology and Properties of Coir Fiber/LLDPE Bio-Composites

2011 ◽  
Vol 217-218 ◽  
pp. 1245-1248 ◽  
Author(s):  
Hong Sheng Tan ◽  
Yuan Zhang Yu ◽  
Jing Zhang
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Fracture Surface ◽  
Impact Strength ◽  
Interfacial Adhesion ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Coir Fiber ◽  
Interface Morphology ◽  
Scanning Electron

The mechanical properties of coir fiber/line low density polyethylene (LLDPE) bio-composites were studied and micrographs of fracture surface of impact specimens for the composites were analyzed by scanning electron microscope (SEM). The flexural and impact strength of the composite with a compatilizer were higher than that of the composite without a compatilizer. The results of interface morphology of the composites with a compatilizer show better interfacial adhesion than that of the composites without one by SEM. That compatibility between the fiber and LLDPE resin is improved on, which is essential reason of rigidity and toughness increase of the composites.

Effects of Synthappret BAP-Based Treatments on the Cuff-Edge Felting and Mechanical Properties of a Lightweight Woven Wool Fabric

1992 ◽  
Vol 62 (10) ◽  
pp. 595-602 ◽  
Author(s):  
P. G. Cookson ◽  
A. G. De Boos
Keyword(s):  
Mechanical Properties ◽  
Mechanical Action ◽  
Wool Fabric ◽  
Bending Rigidity ◽  
Electron Micrograph ◽  
Scanning Electron Micrograph ◽  
Dry Cleaning ◽  
Fiber Damage ◽  
Damage And Failure ◽  
Scanning Electron

Cuff-edge felting of a pure wool shirting fabric treated with Synthappret BAP, either alone or in combination with a polyurethane or polyacrylate, has been examined. Using appropriate levels of polymer, cuff-edge felting was prevented after the recommended test of five 5A washing cycles in a Wascator. The inherent stiffness of the polymer-treated fabric was reduced by washing, decatizing or, especially, dry-cleaning; reductions in bending rigidity were accompanied by increases in extensibility. Scanning electron micrograph studies showed that mechanical action along a cuff edge during washing caused fiber damage and failure of the polymer. Mechanical action also occurred during dry-cleaning, and this lead to more severe cuff-edge felting as a result of subsequent washing. The level of weave crimp has a major bearing on cuff-edge felting.

Preparation of Linear Low-Density Polyethylene-g-Poly(Acrylic Acid)-Co-Starch Hydrogel

2014 ◽  
Vol 1024 ◽  
pp. 163-166
Author(s):  
Maryam Irani ◽  
Hanafi Ismail ◽  
Zulkifli Ahmad
Keyword(s):  
Acrylic Acid ◽  
Low Density Polyethylene ◽  
Water Absorbency ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Electron Micrograph ◽  
X Ray Diffraction ◽  
Scanning Electron Micrograph ◽  
X Ray ◽  
Maximum Water

In this work, a type of hydrogel from waste linear low density polyethylene (LLDPE), acrylic acid (AA), and starch was prepared using N, N-methylenebisacrylamide (MBA) as the crosslinker, and benzoyl peroxide as the initiator. The hydrogel was characterized by Fourier transform infrared spectroscope (FTIR), scanning electron micrograph (SEM), and X-ray diffraction (XRD). The results confirmed the incorporation of acrylic acid and starch in the LLDPE chain. SEM results show that the prepared hydrogel has a porous structure. Product showed maximum water absorbency of 180 g/g in distilled water.

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