Thermomechanical and Rheological Behaviours of Waste Glass Fibre-Filled Polypropylene Composites (original) (raw)
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Performance of Polypropylene Composites: Impact of Coupling Agent and Waste Filler Content
International Journal of Advanced Science and Engineering, 2024
The present investigation aims to investigate the physico-mechanical properties of waste filler-polypropylene composites concerning the compatibilizer concentrations and the industrial waste filler mixing ratio. Three different levels of coupling agent concentration and four different waste filler to polypropylene mixing ratios were used in the experiment to examine the composite's physico-mechanical characteristics. The expected result was that while the melt flow index decreased, the composite density increased as waste filler content did. The addition of waste filler enhanced the thickness swelling of composites slightly when compared to control specimens. The tensile properties of composites significantly improved as the mixture's filler content rose. Specifically, the tensile modulus rose as the amount of filler rose. Similar trends were seen in flexural strength and modulus as well as tensile properties. The notched and unnotched Izod impact strength is decreased by the inclusion of filler. The tensile and flexural properties of the coupling agent-added specimens were much better than those of the control specimens (without any coupling agent). The coupling agent's large molecular weight significantly enhanced the composites' tensile and flexural properties. Overall, the findings point to the possibility of using industrial waste as a practical filler to add reinforcement to polypropylene composites.
Comparisons of Polypropylene Composites : The Effect of Coupling Agent on Mechanical Properties
2017
The aim of this work is to compare the glass fiber (GF)/polypropylene (PP) and black rice husk (BRH)/black rice husk ash (BRHA)/polypropylene (PP) composites on mechanical properties. Tensile, flexural and falling weight impact test was conducted to investigate the effect of filler content and coupling agent (MAPP) on the mechanical properties of the BRH/BRHA/PP composites. Using a coupling agent, the mechanical properties of glass fiber reinforced material is intended to reach. By incorporating up to 10% (by weight) fillers, the tensile strength of GF/PP increased by 21%, BRH/PP and BRHA/PP were decreased by 20% and 10%, respectively, compare to neat polypropylene. Using MAPP provided to enhance the tensile strength of BRH/PP and BRHA/PP composites. And also the effect of water absorption on GF/BRH/BRHA was investigated. Results showed that increasing BRH and BRHA concentration and increasing water contact time greatly increase water absorption. Keyword: composites, mechanical prop...
Chemical Engineering Journal, 2011
The use of coupling agents based on polyolefins is an interesting strategy for the preparation of composites with marked different chemical structure between their components. That is the case of polypropylenebased composites reinforced with lignocellulose fibers. In this work a deep study of the influence of the intrinsic parameters of maleated polypropylene (MAH-PP) has been carried out in order to determine the effect of its acid number as well as molecular weight in mechanical properties of composites reinforced with low cost reinforcements, under tensile, flexural and impact stresses, flow capacity, water absorption behavior and surface morphology. The use of high functionalized MAH-PP coupling leaded to important improvements in mechanical stresses and also a lower capacity of water absorption due to the formation of thinner interfaces. In the case high molecular weight MAH-PP agents, even higher than plain polymer matrix, conducted to an interesting increase in unnotched Charpy Impact Strength attributed to a low dispersion of the coupling agent in the matrix during mixing process keeping microdomains that help to avoid crack propagation.
Short Glass Fiber Filled Waste Plastic (PE) Composites: Studies on Thermal and Mechanical Properties
Progress in Rubber, Plastics and Recycling Technology, 2008
Plastics used in the form of carry bags, pouches, sheets and various other shapes discarded into the Municipal Solid Waste (MSW) is a major concern of environmental pollution these days. In India synthetic textiles from the garment industry and from the rubber industry also goes to the MSW stream. The objective of this paper is to combine the stiffness and strength of the short synthetic fi bers with the waste polyethylene matrix to form useful products. In this study glass fi bers have been chosen from the tyre industry and chopped to short fi bers before mixing with waste plastics. The composites of Short glass fi ber (GF) reinforced Waste Polyethylene (WPE) and neat High Density Polyethylene (HDPE) were prepared separately by melt-mixing technique in a Brabender plasticorder under optimum process conditions. Physico-mechanical properties of the composites at different fi ber loadings were determined using standard methods. Thermal stability of the composites was determined using a thermo gravimetric analyzer. It was observed that the strength properties improved with the fi ber loading up to 50 wt% of the short glass fi bers; beyond which it reduced due to dilution effect. The effect of Maleic anhydride (MAH) grafting onto the waste polyethylene improved the fi ber-matrix adhesion signifi cantly. The effect of Ethylene methacrylic acid (EMA) copolymer as a matrix modifi er improves the adhesion with the glass fi bers. The Waste Polyethylene composites were compared with those of neat HDPE glass fi ber reinforced composites, for its strength and thermal stability. Thermal stability of the composites improved as expected. The results were supplemented by fracture studies by SEM.
Politeknik Dergisi
Various studies on the disposal or storage of the wastes generated due to mining activities have been carried out until today. With the developing technology, the use of alternative products instead of aggregates in Composite and the effect of fiber addition were investigated. The most common of these studies is the bending strength tests on the beam sample. In this study, solid wastes generated by mining operations were used instead of aggregate used in Composite. Beam samples were poured with the dimensions of 40×40×160 mm by adding 4-6 kg/m3 polypropylene fiber to the mixture obtained by using these solid wastes; then, its effects on ultrasonic pulse velocity test, tensile test, and compressive strength tests were conducted. According to the results of these tests, it was found that the fibers had a positive effect on compressive strength and bending strength. Also, it was found that water absorption rates and densities did not have an effect, while the ultrasonic pulse velocity ...
Short glass fiber (SGF) reinforced composite materials were principally fabricated using polypropylene (PP) as thermoplastic matrix. Short glass fiber and polypropylene frequently suffer from lack of adequate fiber-matrix adhesion. This problem was addressed by grafting polypropylene (PP) with maleic anhydride (MA) in the presence of benzyl peroxide (BPO) as an initiator. The results revealed that by increasing fiber contents from 5 to 40 %, tensile strength increases while elongation at break decreases. Rheological behavior was found to be pseudoplastic, whereas viscosity increases by increasing SGF contents. A decrease in die swell was observed with increase in SGF contents.
Journal of the Turkish Chemical Society Section A: Chemistry
This study presents the preparation of short glass fiber reinforced polypropylene (PP/FG) composites using with waste (post-consumer) polypropylene composite containing long glass fiber (PP/LFG) obtained from the recycling of battery covers of trucks. Waste PP/LFG composite parts were mechanically grinded before adding to PP/FG composites. An injection molding machine was used to produce the PP/FG composite test samples loading with recycled waste PP/LFG composite in the range of 1-20% by weight. Effects of recycled waste PP/LFG content on the mechanical, thermal, and morphological properties of the PP/FG composites were investigated. The following three different tests, at various waste PP/LFG ratios, were conducted: Izod/Charpy Impact test, bending test, and tensile test. Mechanical test results showed that mechanical strength of prepared PP/FG composites were not influenced by content of waste PP/LFG material up to 10 wt.%. Differential scanning calorimetry (DSC) was used for the...
Advanced Materials Research, 2013
Recycled polypropylene/microcrystalline cellulose (rPP/MCC) composites were prepared by adding different loadings of maleic anhydride grafted polypropylene (MAPP) coupling agent. The tensile, impact and morphological properties of the composites were investigated. The obtained results show that the tensile and impact strengths of the composites were significantly enhanced with the addition of MAPP loading from 2 to 5 wt%, as compared with unfilled rPP/MCC composites. However, it was found that at low filler content, different amounts of MAPP resulted in no appreciable change in the tensile strength and modulus. Moreover, dynamic mechanical analysis (DMA) results indicated that, increasing the amount of MAPP loading from 2 to 5 wt% in rPP/MCC provide better stiffness of the composite compared to those neat rPP and neat PP. Field emission scanning microscopy (FESEM) has shown that the composite, with MAPP loading, promotes better fibermatrix interaction.
2016
The aim of this study is to monitor the influence of the addition of glass fibers (GFs) treated with polydimethylsiloxane (PDMS) and aminopropyltrimethoxysilane (APTMS) on processability and mechanical and thermal properties of polypropylene. The composites based on PP/GFs were processed on a twin screw extruder-granulator, using 20% glass fibers, relative to the polymer mixture (PP/PP-g-MA). Composite granules obtained by extrusion were used in order to determine flow indices and the values obtained demonstrate that the addition of 20% GFs does not raise serious processability problems (viscosity of the mixture does not vary very widely). Thermal stability tests under load-HDT demonstrate that the best thermal stability is that of the composite reinforced with GFs-PDMS. Mechanical tests also demonstrate that tensile strength, resistance to bending, modulus and elongation at break are superior for the composite reinforced with PP/GFs-PDMS compared with the one reinforced with GFs-APTMS. This can be attributed to the fact that there is a better compatibility between polydimethylsiloxane-treated fibers and the polypropylene matrix compared with those functionalized with aminopropyltrimethoxysilane. Moreover, glass fibers treated with polydimethylsiloxane are more stable to changes in temperature and pressure that the composite is subjected to during processing. TG-DSC results demonstrate a higher thermal stability of the composite with the addition of functionalized fibers.
Mechanical Properties and Modeling of Fibreglass-reinforeced Epoxy Resin Wastes-filled Polypropylene
The polymer composites were prepared from fiberglass reinforced polymer wastes obtained from cross-arm manufacturing and injection moulded after treating with latex and oven dried to reduce the itching nature of the fiberglass. The samples were size-classified as 150, 200, 250 and 300 microns. Tensile tests were later carried out on them. The mechanical properties determined include Tensile strength, Elongation at break, Hardness and Indentation. It is discovered that the tensile strength and indentation increased with increasing filler loadings while elongation and hardness decreased. The research was modelled to obtain higher filler weight percentage values that were not got in the laboratory after accurate and precise predictions were made with Matlab modelling software. The modeling was used to obtain the optimal and best results of the particle sizes.