Flexural and Morphology Properties of Kenaf Fibre Reinforcement Unsaturated Polymer Composite

2017 ◽  
Vol 888 ◽  
pp. 193-197 ◽  
Author(s):  
Nurul Wahida Rusli ◽  
Mohamad Bashree Abu Bakar ◽  
Mohd Zharif Ahmad Thirmizir ◽  
Muhammad Azwadi Sulaiman ◽  
Mohamad Najmi Masri
Keyword(s):  
Flexural Strength ◽  
Polymer Composite ◽  
Unsaturated Polyester ◽  
Strength Properties ◽  
Morphological Properties ◽  
Fibre Reinforcement ◽  
Fiber Fracture ◽  
Kenaf Fibre ◽  
Unsaturated Polymer ◽  
Polyester Composite

This study focus on the preparation of kenaf fibre reinforced unsaturated polyester composite through the compressing molding technique. The composite characterizations in flexural and morphological properties. Flexural test revealed that the incorporation of multiple layers of kenaf mat into unsaturated polymer composite (UPE) resulted in the increase of flexural strength. Nevertheless, the UPE alone still showed superior flexural strength since the presence of natural filler/fibre in polymer tends to reduce strength properties. The results proved that the UPE revealed the formation of microcracks. Thus, it has been noticed that the fiber fracture, fiber debondings and holes are some of the defects, which are observed due to the application of the load on the specimen.

scholarly journals Flexural Strength, Fracture and Impact Toughness Analysis of Kenaf/Woven Fibreglass Polyester Composite

2019 ◽  
Vol 8 (4) ◽  
pp. 6944-6949
Keyword(s):  
Impact Toughness ◽  
Flexural Strength ◽  
Unsaturated Polyester ◽  
Low Cost ◽  
Natural Fibers ◽  
Skin Layer ◽  
Specific Strength ◽  
High Specific Strength ◽  
Kenaf Fibre ◽  
Polyester Composite

Natural fibers may be obtained from plant, animal and mineral sources. They are becoming a promising high potential reinforcement material for composites and thus have drawn attention from many researchers. Apart from their well-known benefits such as environmental friendly, low cost and biodegradability compared to synthetic fibres, they also have low density, minimal abrasive wear to machinery, high specific strength and modulus and can be recycled thermally. In recent years, kenaf fibres have appeared as one of the outstanding materials being used in the textile, building, plastics and automotive industries. However, it cannot be used in heavy applications. Thus hybridization with fibreglass may improve the overall mechanical properties of the composite materials. Kenaf/woven fibreglass unsaturated polyester composites was fabricated using a combination of hand lay-up and cold-press methods. A sandwich configuration with the skin being fibreglass and the core made of kenaf fibre is employed in this work. It can be surmised that the flexural strength, fracture and impact toughness of this hybrid material are influenced by fibreglass at skin layer rather than matrix strength.

scholarly journals Effect of Water Absorption on Flexural Properties of Kenaf/Glass Fibres Reinforced Unsaturated Polyester Hybrid Composites Rod

2022 ◽  
Vol 30 (1) ◽  
pp. 397-412
Author(s):  
Bassam Hamid Alaseel ◽  
Mohamed Ansari Mohamed Nainar ◽  
Noor Afeefah Nordin ◽  
Zainudin Yahya ◽  
Mohd Nazim Abdul Rahim
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Glass Fibre ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Flexural Properties ◽  
Effect Of Water ◽  
Kenaf Fibre ◽  
Kenaf Fibres

This study investigates the effect of water absorption on the flexural strength of kenaf/ glass/unsaturated polyester (UPE) hybrid composite solid round rods used for insulating material applications. Three volume fractions of kenaf/glass fibre 20:80 (KGPE20), 30:70 (KGPE30), and 40:60 (KGPE40) with three different fibre arrangement profiles of kenaf fibres were fabricated by using the pultrusion technique and were aimed at studying the effect of kenaf fibres arrangement profile and its content in hybrid composites. The fibre/ resin volume fraction was maintained constant at 60:40. The dispersion morphologies of tested specimens were observed using the scanning electron microscope (SEM). The findings were compared with pure glass fibre-reinforced UPE (control) composite. The water absorption results showed a clear indication of how it influenced the flexural strength of the hybrid and non-hybrid composites. The least affected sample was observed in the 30KGPE composite type, wherein the kenaf fibre was concentrated at the centre of a cross-section of the composite rod. The water absorption reduced the flexural strength by 7%, 40%, 24%, and 38% of glass/UPE (control), 20KGPE, 30KGPE, and 40KGPE composites, respectively. In randomly distributed composite types, the water absorption is directly proportional to the volume fraction of kenaf fibre. At the same time, flexural properties were inversely proportional to the volume fraction of kenaf fibres. Although the influence of water absorption on flexural strength is low, the flexural strength of pultruded hybrid composites was more influenced by the arrangement of kenaf fibre in each composite type than its fibre loading.

Environmental Stress Cracking Resistance (ESCR) of Rubber-Toughened Polyester-Kenaf Composites under Active Environment

2013 ◽  
Vol 701 ◽  
pp. 59-63
Author(s):  
N.S. Shuhaimen ◽  
N.N. Bonnia ◽  
Mohd Redzuan Aein Afina ◽  
M.R.H. Mohamed
Keyword(s):  
Sea Water ◽  
Unsaturated Polyester ◽  
Flexural Modulus ◽  
Morphological Properties ◽  
Kenaf Fibre ◽  
Environment Exposure ◽  
Rubber Toughened ◽  
Environmental Stress Cracking ◽  
Liquid Natural Rubber ◽  
Kenaf Composites

This study was undertaken to investigate mechanical and morphological properties of rubber toughened polyester composite filled with kenaf and was exposed in varying natural weathering and difference environmental condition (Artificial Sea Water (SW), Distilled Water (DS), Environment Exposure (EX) and Soil Exposure (SL)). Rubber-toughened polyester-kenaf fibre composites were prepared by adding 25% of kenaf fibre in unsaturated polyester resin and cross linked with a mixture of methyl ethylketone peroxide and cobalt octanoate. Three percent (3%) of liquid natural rubber (LNR) were added as a toughening agent. The sample was prepared using compression molding technique. It was found that the samples that being immersed in seawater (SW) had lower mechanical properties values as compare with other conditions. The value of flexural modulus and flexural strength were decrease by 35.9 % , 12.5% but the value of impact strength had slightly increase by 34% .The microstructures of the composites fracture surface were examined using a scanning electron microscope (SEM).

Physico-Mechanical Properties of Banana Fiber Reinforced Polymer Composite as an Alternative Building Material

2015 ◽  
Vol 650 ◽  
pp. 131-138 ◽  
Author(s):  
Himadri Das ◽  
Pallav Saikia ◽  
Dipul Kalita
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Materials ◽  
Flexural Strength ◽  
Polymer Composite ◽  
Natural Fiber ◽  
Strength Properties ◽  
Banana Fiber ◽  
Elongation At Break ◽  
Ldpe Composites

Utilization of natural fiber as reinforcing material is the latest trend in polymer science to produce higher strength with lower weight composite materials having wide range of applications. As a natural fiber, banana fiber is getting importance in recent years in the reinforcement arena of polymer composite. Two species of banana vizMusa sapientumandMusa paradisicaavailable in North East India were selected considering their higher fiber yield and adequate strength properties of the fibers. The chemical compositions, spectroscopic and thermal properties of these fibers were studied in order to study their suitability for commercial exploration. Low density polyethylene (LDPE)-banana fiber reinforced composites were prepared using hydraulic hot press. Physico-mechanical properties (e.g. tensile strength, flexural strength, elongation at break, Young's modulus) of the prepared composites were determined. The tensile strengths and flexural strengths of the composites increased while using LDPE 10 to 30 % of the fiber and then started to decrease gradually. Young moduli of the composites increased with the increase of fiber mass. Water absorption also increased accordingly with the increase of the fiber weight. The elongation at break decreased with increasing fiber quantity. The mechanical strength properties of chemically treated banana fiber-LDPE composites were slightly higher than the mechanically extracted fiber-LDPE composites. Structural analyses of the treated fibers were carried out by FTIR and XRD. These studied revealed due to the removal of noncellulosic constituents such as hemicelluloses and lignin the crystalline properties of the fibers were increased. All the properties of composite like tensile strength, flexural strength, water absorption capacity etc. plays a significant role in these polymer composite materials. Hence it can be concluded that banana fiber can be used as reinforced agent successfully in the composite industry as a sustainable building material.

scholarly journals Mechanical Performance Analysis on Bamboo Fiber Reinforced Polyester Composite

2019 ◽  
Vol 9 (1S4) ◽  
pp. 833-835
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Flexural Strength ◽  
Mechanical Performance ◽  
Unsaturated Polyester ◽  
Natural Fibers ◽  
Bamboo Fiber ◽  
Weight Percentage ◽  
Polyester Composite ◽  
Composite Production

The present study narrates about the performance of bamboo fiber against polymer matrix. Among different natural fibers bamboo proved to be a potential ones for effective composite production. Based on this aspect this research carried out by using bamboo fiber of length 5mm in chopped form as reinforcement unsaturated polyester used as matrix. The studies were done by varying the bamboo fiber weight percentage as 20, 30 and 40% weight respectively. The prepared specimens are subjected to tensile strength, flexural strength and Impact strength studies. Based on the results obtained this composite suggested for suitable application.

Mechanical and Water Absorption Properties of Hybrid Kenaf/Glass Fibre Mat Reinforced Unsaturated Polyester Composites

2017 ◽  
Vol 888 ◽  
pp. 228-233 ◽  
Author(s):  
Nurshairatun Amira Rozali ◽  
Mohamad Bashree Abu Bakar ◽  
Mohamad Najmi Masri ◽  
Muhammad Azwadi Sulaiman ◽  
Mazlan Mohamed ◽  
...  
Keyword(s):  
Water Absorption ◽  
Glass Fibre ◽  
Room Temperature ◽  
Hybrid Composites ◽  
Unsaturated Polyester ◽  
Morphological Properties ◽  
Flexural Test ◽  
Thickness Swelling ◽  
Absorption Properties ◽  
Kenaf Fibre

Hybrid kenaf/glass fibre mat reinforced unsaturated polyester (UPE) composites have been prepared by using simple hand lay up moulding technique. The composites with various formulations were characterized by flexural test while water absorption behaviour were investigated with immersion in distilled water at room temperature. The result shows that the hybrid composites with kenaf fibre mat at the innermost layers (glass fibre mat at the outer layers) has given the highest flexural strength and modulus. On the other hand, water absorption study shows that, the hybrid composites with glass fibre mat at the innermost layers (kenaf fibre mat at the outer layers) showed the highest water uptake and thickness swelling. Further investigations on morphological properties were also done to correlate the mechanical properties of the hybrid kenaf/glass fibre mat reinforced UPE composites.

Mechanical Properties of Rubber Toughened Polyester-Kenaf Composites under Active Environment

2013 ◽  
Vol 812 ◽  
pp. 107-112
Author(s):  
N.N. Bonnia ◽  
N.S. Shuhaimen ◽  
A.A. Redzuan
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Sea Water ◽  
Unsaturated Polyester ◽  
Kenaf Fibre ◽  
Environment Exposure ◽  
Rubber Toughened ◽  
Liquid Natural Rubber ◽  
Polyester Composite ◽  
Kenaf Composites

In this study rubber toughened polyester composite filled with kenaf was exposed in different environmental condition such as in artificial sea water (SW), distilled water (DS), environment exposure (Ex) and soil exposure (SL). Rubber-toughened polyester-kenaf fibre composites were prepared by adding 25% of kenaf fibre in unsaturated polyester resin and cross linked with a mixture of methyl ethylketone peroxide and cobalt octanoate. Three percent (3%) of liquid natural rubber (LNR) were added as a toughening agent. The sample was prepared using compression molding technique. The mechanical properties of the composites were evaluated by hardness, flexural and fracture toughness testing. It was found that the samples that being immersed in seawater (SW) had lower mechanical properties as compared to other conditions. The value of hardness strength were decrease about 1.7% and for fracture toughness the decreasing is about 8.53% while flexural strength had been decrease by 30%. Bonding mechanisms were then assessed by scanning electron microscope and FTIR analysis

scholarly journals Investigating the effect of pressing temperature on the thermal, mechanical, and morphological properties of nanocomposites made from recycled polyethylene, nanosilica, and wood flour

BioResources ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. 3871-3885
Author(s):  
Amir Lashghari ◽  
Ehsan Ganjavi
Keyword(s):  
Flexural Strength ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Impact Resistance ◽  
Weight Ratio ◽  
Strength Properties ◽  
Morphological Properties ◽  
Sem Images ◽  
Recycled Polyethylene ◽  
The Impact

This study investigated the effect of pressurized temperature on the thermal, mechanical, and morphological properties of nanocomposites made from recycled polyethylene with the weight ratio of 50%. Nanosilica was applied at 3 levels (0, 4, 8 %) and wood flour had a weight ratio of 50%. High-density polyethylene (HDPE) went through multiple procedures. It was found that by increasing the nanosilica content, the tensile and flexural strength properties, the residual ash content, and the thermal stability increased along with a reduction in the tensile and flexural modulus and impact resistance. As the temperature increased, the tensile and flexural strength and modulus and the impact resistance decreased. Scanning electron microscopy (SEM) images revealed that samples with 8% nanosilica showed different polymerization than the wood flour particles.

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