Tensile and Impact Strength of Coir Fibre Reinforced Polypropylene Composites: Effect of Different Temperature Conditions

2015 ◽  
Vol 763 ◽  
pp. 25-29
Author(s):  
Z. Salleh ◽  
Koay Mei Hyie ◽  
Syarifah Yunus ◽  
Y.M. Taib ◽  
M.N. Berhan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Impact Strength ◽  
Tensile Properties ◽  
Volume Fraction ◽  
Hot Press ◽  
Impact Properties ◽  
Polypropylene Composites ◽  
Coir Fibre ◽  
Izod Impact ◽  
Fibre Loading

This study focuses on tensile properties and impact strength of coir fibre reinforced polypropylene composites under influences of fibre loading and various temperatures conditions. All samples were fabricated by using hot-press technique. Tensile and izod impact samples were prepared in accordance to the standard specifications as closely as possible. Three different ratios of fibre with matrix which were 10%, 20% and 30% were studied. The results revealed that 20% volume fraction of coir fibre demonstrated optimum tensile and impact properties. Significance reduction of impact strength under low temperature condition had been shown for all composites due to the brittleness of both fibre and matrix.

MECHANICAL PROPERTIES (IMPACT STRENGTH) OF PINEAPPLE LEAF FIBRE REINFORCED POLYPROPYLENE COMPOSITES WITH VARIATION OF FIBRE LOADING AND TREATMENT PROCESS.

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
SM Sapuan 1,2,,b ◽  
S. Izwan 1a
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Treatment Process ◽  
Volume Fraction ◽  
Thermoplastic Composite ◽  
Polypropylene Composites ◽  
Sem Micrograph ◽  
Good Potential ◽  
Fibre Loading ◽  
Scanning Electron

This paper presents the study of mechanical properties of short pineapple leaf fibre reinforced polypropylene composites. Pineapple leaf fibre (PALF) is one of them that have also good potential as reinforcement in thermoplastic composite. It is the objective of the current research to characterize the mechanical properties of treated and untreated composites of PALF reinforced polypropylene (PP) composite with four different volume fractions of pineapple leaf fiber (PALF) was fabricated, (5 vol%, 10 vol%, 15 vol% and 20 vol%).  The study of this PALF-PP composite demonstrates that bulk density of the composite decrease as the volume fraction increased. From the study about impact strength toward the fibre loadings, impact strength and energy absorbed increase as the volume fraction of fibre increased. Untreated PALF gives greater impact strength than treated PALF. From the experiment conducted on impact test and scanning electron microscopy experiment, untreated fibre produce greater impact and absorbed energy than treated fibre. Until 20% of PALF, result showed strength of the composite still rising to prove that 20% of fibre will fabricate finest fibre loading for the PALF-PP composite was observed from the scanning electron microscope (SEM) micrograph as an evidences on compatibility mechanical properties at the intersectional region of composite.

Influence of fibre loading and surface treatment on the impact strength of coir polyester composites

2021 ◽  
Vol 1 (107) ◽  
pp. 16-20
Author(s):  
S. Karthikeyan
Keyword(s):  
Impact Strength ◽  
Solution Concentration ◽  
Natural Fibre ◽  
Soaking Time ◽  
Impact Properties ◽  
Coir Fibre ◽  
Polyester Composite ◽  
Polyester Composites ◽  
The Impact ◽  
Fibre Loading

Purpose: In this work, coir fibre with varying fibre content was selected as reinforcements to prepare polymer-based matrices and the problem of reduced fibre-matrix interfacial bond strength has been diluted by chemical treatment of coir fibres with alkali solution. Design/methodology/approach: The effect of fibre loading, solution concentration and soaking time on the impact strength of the composites were analyzed using statistical techniques. Response Surface Methodology (RSM) approach was used to model and optimize the impact properties of coir-polyester composites. Findings: The impact strength of coir fibre reinforced polyester composite depends mainly on the fabrication parameters such as fibre-polyester content, soaking time, concentration of soaking agent and adhesive interaction between the fibre and reinforcement. Research limitations/implications: The mechanical properties of any coir polyester composite depend on the nature bonding between the fibre and reinforcement. The presence of cellulose, lignin on the periphery of any natural fibre reduces the bonding strength of the composite. This limitation is overcome by fibre treatment over sodium hydroxide to have better impact properties. Practical implications: Now days, natural fibre reinforced composites are capable of replacing automotive parts, subjected to static loads such as engine Guard, light doom, name plate, tool box and front panels etc. These materials can withstand any static load due to its higher strength to weight ratios. Originality/value: The effect of fibre loading, solution concentration and soaking time on the impact strength of the composites were analyzed using statistical techniques. Response Surface Methodology (RSM) approach was used to model and optimize the impact properties of coir-polyester composites. The impact strength of NaOH impregnated coir fibre reinforced polyester composites was evaluated.

scholarly journals Low-Temperature Mechanical Properties of High-Density and Low-Density Polyethylene and Their Blends

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1821
Author(s):  
Ildar I. Salakhov ◽  
Nadim M. Shaidullin ◽  
Anatoly E. Chalykh ◽  
Mikhail A. Matsko ◽  
Alexey V. Shapagin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Impact Strength ◽  
Relative Elongation ◽  
High Density ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Elongation At Break ◽  
Subzero Temperatures ◽  
Izod Impact

Low-temperature properties of high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and their blends were studied. The analyzed low-temperature mechanical properties involve the deformation resistance and impact strength characteristics. HDPE is a bimodal ethylene/1-hexene copolymer; LDPE is a branched ethylene homopolymer containing short-chain branches of different length; LLDPE is a binary ethylene/1-butene copolymer and an ethylene/1-butene/1-hexene terpolymer. The samples of copolymers and their blends were studied by gel permeation chromatography (GPC), differential scanning calorimetry (DSC), 13С NMR spectroscopy, and dynamic mechanical analysis (DMA) using testing machines equipped with a cryochamber. It is proposed that such parameters as “relative elongation at break at −45 °C” and “Izod impact strength at −40 °C” are used instead of the ductile-to-brittle transition temperature to assess frost resistance properties because these parameters are more sensitive to deformation and impact at subzero temperatures for HDPE. LLDPE is shown to exhibit higher relative elongation at break at −45 °C and Izod impact strength at −20 ÷ 60 °C compared to those of LDPE. LLDPE terpolymer added to HDPE (at a content ≥ 25 wt.%) simultaneously increases flow properties and improves tensile properties of the blend at −45 °C. Changes in low-temperature properties as a function of molecular weight, MWD, crystallinity, and branch content were determined for HDPE, LLDPE, and their blends. The DMA data prove the resulting dependences. The reported findings allow one to understand and predict mechanical properties in the HDPE–LLDPE systems at subzero temperatures.

Impact Properties of Syntactic Foams and Effect of Microballoon Wall Thickness

2006 ◽  
Author(s):  
Tien-Chih Lin ◽  
Nikhil Gupta
Keyword(s):  
Impact Strength ◽  
Total Energy ◽  
Energy Absorption ◽  
Volume Fraction ◽  
Impact Testing ◽  
Syntactic Foams ◽  
Lower Strength ◽  
Impact Properties ◽  
Different Types ◽  
Pendulum Impact

Hollow particle (microballoon) filled polymeric composites, called syntactic foams, are tested for impact properties in the present work. Izod type pendulum impact testing is carried out on eight types of foams, which are made of four types of microballoons used in volume fractions of 0.5 and 0.6. Variation in the volume fraction of microballoons leads to a difference in the total energy absorbed during fracture of different types of foams. Results show that syntactic foams containing microballoons of lower density show lower impact strength because of the lower strength of these microballoons. An increase in microballoon volume fraction leads to decreased energy absorption and strength.

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.

Tensile properties and fire residue morphology of flame-retarded-polypropylene composites

2020 ◽  
pp. 089270572092512
Author(s):  
Ji-Zhao Liang
Keyword(s):  
Flame Retardant ◽  
Tensile Properties ◽  
Flame Retardants ◽  
Volume Fraction ◽  
Tensile Elongation ◽  
Zinc Borate ◽  
Tensile Yield Strength ◽  
Tensile Fracture ◽  
Polypropylene Composites ◽  
Flame Retarded

The polypropylene (PP) composites filled with flame retardants (including aluminum hydroxide (Al(OH)3), magnesium hydroxide (Mg(OH)2), and zinc borate (ZB)) were prepared, and the composites were separately loaded with polyolefin elastomer (POE) and nanometer calcium carbonate (nano-CaCO3). The tensile properties and the fire residue morphology of the specimens after burning for these three groups of composites were measured. The results were shown that the tensile fracture strength and the Young’s modulus increased while the tensile yield strength and the tensile elongation at break ( δ b) decreased with increasing flame-retardant volume fraction. At the same flame-retardant content, the δ b values of the PP/Al(OH)3/Mg(OH)2/ZB/nano-CaCO3/POE composite were the highest in the three groups of composites. The fire residue in the pyrolysis zone of the specimens increased corresponding to the increased flame-retardant volume fraction and with loading the nano-CaCO3 and POE, especially at low-flame-retardant concentration. The reinforcing and the flame-retarded mechanisms of the composites were discussed.

Micro-Structure and Mechanical Property of Polypropylene Composites Filled with Modified Attapulgite

2012 ◽  
Vol 174-177 ◽  
pp. 1384-1387
Author(s):  
Li Li Xu ◽  
Chang Hua Liu ◽  
Sheng Peng Liu
Keyword(s):  
Impact Strength ◽  
Chemical Structure ◽  
Interfacial Interaction ◽  
Micro Structure ◽  
Polypropylene Composites ◽  
Propyl Methacrylate ◽  
Izod Impact Strength ◽  
Izod Impact ◽  
Modified Attapulgite ◽  
Scanning Electron

Organified Attapulgites (AT) were grafted with 3-(trimethoxysilyl) propyl methacrylate ( KH570 ) on the surface of AT particles. Then, the modified AT (AT-g-KH570) and untreated AT particles were compounded with polypropylene (PP) to prepare PP/AT-g-KH570 and PP/AT composites respectively. The morphology, chemical structure and mechanical properties of the composites were also investigated with scanning electron microscopy (SEM), Fourier-transform infrared spectra (FTIR) and mechanical testing. The FTIR results showed that the KH570 is grafted on the AT particles. The tensile strength and izod impact strength of PP/AT-g-KH570 composites were improved obviously than those of PP/AT composites. The izod impact strength of PP/AT-g-KH570 composites show the maximum and was enhanced 50 % at 1 wt% loading, which contributed to homogeneous dispersion of particles and enhanced the interfacial interaction between modified AT particles and PP matrix.

Preparation of Polymer-Nanodiamond Composites with Improved Properties

2008 ◽  
Vol 59 ◽  
pp. 275-278 ◽  
Author(s):  
Valeriy V. Karbushev ◽  
Ivan I. Konstantinov ◽  
Irina L. Parsamyan ◽  
Valery G. Kulichikhin ◽  
Vladimir A. Popov ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Transmission Electron Microscopy ◽  
Impact Strength ◽  
Tensile Properties ◽  
Efficient Method ◽  
Brinell Hardness ◽  
Detonation Nanodiamond ◽  
Transmission Electron ◽  
Izod Impact

An efficient method is developed to achieve improved dispersion of detonation nanodiamond particles in amorphous thermoplastic matrices. For an estimation of the nanodiamond distribution in slices, a method of optical and transmission electron microscopy is used. The complex set of mechanical properties of polymer-nanodiamond composites is considered: tensile properties, Izod impact strength and Brinell hardness. It is found that the reinforcing and toughening effects of uniformly-dispersed nanoparticles on polymer matrices is pronounced at lower loading compared with traditional mixing procedure.

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