scholarly journals Effects of Waste Expanded Polypropylene as Recycled Matrix on the Flexural, Impact, and Heat Deflection Temperature Properties of Kenaf Fiber/Polypropylene Composites

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2578
Author(s):  
Junghoon Kim ◽  
Donghwan Cho
Keyword(s):  
Impact Strength ◽  
Natural Fiber ◽  
Flexural Modulus ◽  
Fiber Composites ◽  
Kenaf Fiber ◽  
Polypropylene Composites ◽  
Izod Impact ◽  
Pp Composites ◽  
Heat Deflection Temperature ◽  
Kenaf Fibers

Waste Expanded polypropylene (EPP) was utilized as recycled matrix for kenaf fiber-reinforced polypropylene (PP) composites produced using chopped kenaf fibers and crushed EPP waste. The flexural properties, impact strength, and heat deflection temperature (HDT) of kenaf fiber/PP composites were highly enhanced by using waste EPP, compared to those by using virgin PP. The flexural modulus and strength of the composites with waste EPP were 98% and 55% higher than those with virgin PP at the same kenaf contents, respectively. The Izod impact strength and HDT were 31% and 12% higher with waste EPP than with virgin PP, respectively. The present study indicates that waste EPP would be feasible as recycled matrix for replacing conventional PP matrix in natural fiber composites.

scholarly journals Effects of High-Temperature Exposure on the Mechanical Properties of Kenaf Composites

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1643 ◽  
Author(s):  
Nabilah Afiqah Mohd Radzuan ◽  
Dulina Tholibon ◽  
Abu Bakar Sulong ◽  
Norhamidi Muhamad ◽  
Che Hassan Che Haron
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Molding Process ◽  
Kenaf Fiber ◽  
Polypropylene Composites ◽  
Safety Issues ◽  
Automotive Parts ◽  
Kenaf Composites ◽  
Temperature Exposure ◽  
Kenaf Fibers

Automotive parts, including dashboards and trunk covers, are now fabricated through a compression-molding process in order to produce lightweight products and optimize fuel consumption. However, their mechanical strength is not compromised to avoid safety issues. Therefore, this study investigates kenaf-fiber-reinforced polypropylene composites using a simple combing approach to unidirectionally align kenaf fibers at 0°. The kenaf composite was found to withstand a maximal temperature of 120 °C. The tensile and flexural strengths of the aligned kenaf composites (50 and 90 MPa, respectively) were three times higher than those of the commercialized Product T (between 39 and 30.5 MPa, respectively) at a temperature range of 90 to 120 °C. These findings clearly showed that the mechanical properties of aligned kenaf fibers fabricated through the combing technique were able to withstand high operating temperatures (120 °C), and could be used as an alternative to other commercial natural-fiber products.

Mechanical properties and biodegradability of enzyme-retted kenaf fiber composites

2018 ◽  
Vol 89 (9) ◽  
pp. 1782-1791 ◽  
Author(s):  
Jong Sun Jung ◽  
Kyung Hun Song ◽  
Seong Hun Kim
Keyword(s):  
Mechanical Properties ◽  
Adhesion Force ◽  
Flexural Modulus ◽  
Fiber Composites ◽  
Poly Vinyl Alcohol ◽  
Modified Starch ◽  
Kenaf Fiber ◽  
Poly Ethylene ◽  
Kenaf Fibers ◽  
Aerobic Biodegradability

The mechanical properties and biodegradability of retted kenaf and modified starch composites fabricated by adding enzyme-retted kenaf as a filler and poly(vinyl alcohol) (PVA), poly(ethylene glycol), or glycerol as a plasticizer are compared with those of the NaOH-retted counterparts fabricated under identical conditions. In the case of enzyme retting, the composite treated with the PVA plasticizer was deemed the most appropriate for achieving optimal tensile strength, flexural strength, and flexural modulus. Further, the retting treatment, the length of the kenaf fiber, the type of treatment (single- or double-sided), and the adhesion force at the interface significantly affect the mechanical properties of the composites. According to the aerobic biodegradability assessment in natural reclamation conditions, the modified starch composite fabricated using 50-mm-long enzyme-retted kenaf fibers as the filler and double-side treated with PVA plasticizer showed a biodegradation rate of 80% or higher after 80 days.

scholarly journals Effect of Halloysite Nanotube on Mechanical Properties, Thermal Stability and Morphology of Polypropylene and Polypropylene/Short Kenaf Fibers Hybrid Biocomposites

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4459 ◽  
Author(s):  
Piotr Franciszczak ◽  
Iman Taraghi ◽  
Sandra Paszkiewicz ◽  
Maksymilian Burzyński ◽  
Agnieszka Meljon ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Flexural Modulus ◽  
Kenaf Fiber ◽  
Halloysite Nanotube ◽  
Low Concentrations ◽  
Izod Impact ◽  
Kenaf Fibers

In this article, the effect of the addition of halloysite nanotube (HNT) on the mechanical and thermal stability of polypropylene (PP) and PP/kenaf fiber biocomposites has been investigated. Different volume contents of HNTs ranging from 1 to 10 vol.% were melt mixed with PP and PP/kenaf fibers. The volume content of kenaf fibers was kept constant at 30%. The morphology of HNTs within the PP matrix has been studied via scanning electron microscopy (SEM). The morphological results revealed that HNT was uniformly dispersed in the PP matrix already at a low concentration of 1 and 2 vol.%. The mechanical properties of the manufactured nanocomposites and hybrid biocomposites such as Young’s modulus, tensile strength, elongation at break, flexural modulus, flexural strength, and notched Izod strength have been measured. The results show that Young’s modulus and strengths have been improved along with the addition of low content of HNTs. Moreover, the gain of notched Izod impact strength obtained by the addition of short kenaf fibers was maintained in hybrids with low concentrations of HNTs. Finally, the thermogravimetric analysis shows that at 10% and 50% weight loss, the thermal degradation rate of the PP and PP/kenaf biocomposites decreased by the addition of HNTs.

scholarly journals Improving the mechanical properties of polypropylene composites with coconut shell particles

2021 ◽  
Vol 30 ◽  
pp. 263498332110074
Author(s):  
Henry C Obasi ◽  
Uchechi C Mark ◽  
Udochukwu Mark
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Flexural Modulus ◽  
Filler Particle ◽  
Tensile Modulus ◽  
Coconut Shell ◽  
Polypropylene Composites ◽  
Increase With Increase ◽  
Pp Composites ◽  
Shell Particles

Conventional inorganic fillers are widely used as fillers for polymer-based composites. Though, their processing difficulties and cost have demanded the quest for credible alternatives of organic origin like coconut shell fillers. Dried shells of coconut were burnt, ground, and sifted to sizes of 63, 150, 300, and 425 µm. The ground coconut shell particles (CSP) were used as a filler to prepare polypropylene (PP) composites at filler contents of 0% to 40% via injection melt blending process to produce PP composite sheets. The effect of the filler particle size on the mechanical properties was investigated. The decrease in the size of filler (CSP) was found to improve the yield strength, tensile strength, tensile modulus, flexural strength, flexural modulus, and hardness of PP by 8.5 MPa, 15.75 MPa, 1.72 GPa, 7.5 MPa, 100 MPa, and 10.5 HR for 63 µm at 40%, respectively. However, the elongation at break and modulus of resilience of the PP composites were seen to increase with increase in the filler size. Scanning electron microscope analysis showed that fillers with 63 µm particle size had the best distribution and interaction with the PP matrix resulting in enhanced properties.

Preliminary Study of HDPE/Kenaf/MMT Nano-Hybrid Biocomposite: Performance of HDPE/Kenaf Biocomposite

2015 ◽  
Vol 1113 ◽  
pp. 99-104
Author(s):  
Mohamad Asnawi bin Ya’acob ◽  
Ku Halim Ku Hamid ◽  
Suffiyana Akhbar ◽  
Mohd Faizal Abdul Rahman
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Screw Extruder ◽  
Kenaf Fiber ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Preliminary Study ◽  
Hybrid Biocomposite

This work studies the performance of HDPE/kenaf biocomposite by varying the kenaf loading from 10 wt% to 50 wt%. Compounding has carried out by using single screw extruder. The result indicates that at 10 wt% of kenaf loading gave the highest tensile and impact strength which are25.32 MPa and 102.25 MPa respectively. Beside, at 10% to 50% of kenaf loading show increasing tensile modulus, flexural modulus and flexural strength with increment of kenaf fiber but decreasing in tensile strength and impact strength.

A Study of the Effects of Ingredients to the Mechanical Properties of Natural Fiber Composites (NFC)

2013 ◽  
Vol 689 ◽  
pp. 382-388
Author(s):  
Ju Seok Oh ◽  
Song Woo Nam ◽  
Sun Woong Choi
Keyword(s):  
Mechanical Properties ◽  
Natural Fiber ◽  
Wood Flour ◽  
Fiber Composite ◽  
Flexural Modulus ◽  
Construction Materials ◽  
Fiber Composites ◽  
Polymer Processing ◽  
Base Resin ◽  
Natural Fiber Composite

The importance of NFC (Natural Fiber Composite) as construction materials is widely accepted all over the world. But it seems that NFC manufacturers have complicated information about the effect of ingredients to their products. Hence systematic study for optimum composition of NFC is needed. This study is aimed to elucidate the effect of ingredients to the mechanical properties of NFC. We devised design of experiments to draw a firm conclusion. The experiments were conducted with polymer processing machines which are widely accepted in polymer processing industries. The result of ANOVA analysis showed that the most important ingredient of NFC is wood flour. And as the length of wood flour increases, the mechanical properties are enhanced. Contrary to wood flour, base resin has little effect to the mechanical properties of NFC. The effect of coupling agent to flexural modulus is not ignorable, but the effect to flexural strength is different from that of flexural modulus.

HIGH-IMPACT PP NANOCOMPOSITES: INFLUENCE OF CLAY CONTENT ON MECHANICAL AND THERMAL PROPERTIES

2013 ◽  
Vol 12 (06) ◽  
pp. 1350039
Author(s):  
L. G. FURLAN ◽  
RICARDO V. B. OLIVEIRA ◽  
ANDRÉIA C. E. MELLO ◽  
SUSANA A. LIBERMAN ◽  
MAURO A. S. OVIEDO ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Impact Strength ◽  
Flexural Modulus ◽  
Clay Content ◽  
Mechanical Analysis ◽  
High Impact ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Transmission Electron ◽  
Izod Impact

The preparation of high-impact polypropylene nanocomposites with different organo-montmorillonite (O-MMT) contents by means of meltprocessing was investigated. The nanocomposite properties were evaluated by transmission electron microscopy (TEM), flexural modulus, izod impact strength, dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). It was noticed that the PP/O-MMT nanocomposites properties were affected by clay content. Exceptional improvements in impact strength were obtained (maximum of 185%) by the use of low O-MMT content. The results showed that higher enhancement on mechanical/thermal properties was obtained by 3 wt.% of O-MMT instead of higher quantities.

Prediction of Mechanical Properties of Polymer Composites Reinforced with Feather Fibers of ‘Emu’ Bird

2014 ◽  
Vol 592-594 ◽  
pp. 694-699
Author(s):  
Chandra V. Sekhar ◽  
V. Pandurangadu ◽  
T. Subba Rao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Response Surface Methodology ◽  
Natural Fiber ◽  
Flexural Modulus ◽  
Fiber Composites ◽  
Weight Percentage ◽  
Feather Fibers ◽  
Prediction Of Mechanical Properties ◽  
Feather Fiber

Now a day’s researchers are focusing on natural fiber composites. In the present work composites were prepared with epoxy (Araldite LY-556) resin and ‘emu’ bird feathers as fiber. The composites were prepared by varying the weight percentage (P) of ‘emu’ fiber ranging from 1 to 5 and length (L) of feather fibers from 1 to 5 cm. The various mechanical properties like tensile strength, flexural strength; flexural modulus and impact strength were determined. An attempt is made to model the mechanical properties through response surface methodology (RSM). Analysis of Variance (ANOVA) is used to check the validity of the model. The results reveal that the developed models are suitable for prediction of mechanical properties of Epoxy ‘Emu’ Feather Fiber Composites.

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