Bhowmick indian institute of technology, kharagpur, india keywords. Various fibers are widely used as reinforcement in thermoplastic polypropylene pp matrix to prepare composites. For the natural fiber component of the composites, cotton fiber was compared with wood fiber. Tensile test results showed that the combination of two different clays caused an increase in flexural modulus and higher impact strength.
Keywordshigh density polyethylene, mechanical properties, nano tio2, polypropylene. Mechanical properties of plastic materials material formula abrasive resistance astm d1044 mg cycles coefficient of friction compression set after 24 hr at 175c % compressive modulus gpa compressive strength mpa elongation at break % hardness rockwell izod impact strengt h j m1 poissons ratio tear strength n mm1 tensile modulus. Elastic modulus is very much lower than for metals or ceramics beyond the yield point sample. Myrtha karina, a, anung syampurwadi, a rahmat satoto, a yuyun irmawati, b and tita puspitasari c. The investigations demonstrated a noticeable improvement in static and dynamic mechanical properties with the addition of micron size fillers, and properties of this developed material are. Especially reinforced plastics become popular because of their high strength besides their advantages of low weight and easy manufacturability. The aim of this work is to study the properties of recycled polypropylene in particular through the analysis of degradation by the mechanical properties from virgin and recycled material. Concordia universitymech 221 lecture 203 mechanical properties of polymers schematic stressstrain curve for a plastic polymer showing how yield and tensile strengths are determined. However, under severe conditions it becomes brittle. Yielding or excessive plastic deformation failure of polymers in certain applications to carry design loads or occasional accidental overloads may be due to excessive plastic deformation resulting from the inadequate strength properties of the polymer. Physical, thermal, and mechanical properties of polypropylene composites filled with rattan nanoparticles. In this study, the mechanical properties of polypropylene ppnatural fiber composites were studied.
Mechanical properties modulus of elasticity youngs modulus homopolymer 183,000 psi 1,300 mpa copolymer 155,000 psi 1,100 mpa poissons ratio 0. Mechanical properties of polypropylene composites sage journals. Polypropylene is widely used in automotive parts because of its low cost, weldability, and mechanical properties. Mechanical properties, dynamic mechanical properties, stress, strain, polymer, plastics, elastomers, rubber contents 1. Structural and mechanical properties of polymer nanocomposites. These mixtures were analysed as a function both of blend composition and of the number of reprocessing of the recycled fraction. Polypropylene is a semicrystalline polymer that exhibits very attractive mechanical properties, like ductility and strength at room temperature or under moderate rates of deformation1. There are two types on molecular weight dependence of mechanical properties, as shown in figure 1. The absence of any real need for high molecular weight, from the mechanical properties view point, leads to low melt viscosity easy flow. Materials scientists learn about these mechanical properties by testing materials.
Different loading conditions were considered to study the tensile properties of non woven fabric. Chemical and physical properties of polypropylene several different polymerisation methods can be used to produce pp, but all rely on exposing the propylene monomer to high temperatures and pressures in the presence of an active metal catalyst. Mechanical properties of parts fabricated using material extrusion are of great interest, as is the reduction in anisotropy. Pdf mechanical properties of polypropylene composites a. Plastic material properties table mechanical, physical. Physical, thermal, and mechanical properties of polypropylene. Microstructure and mechanical properties of sisal particles reinforced polypropylene composite. The comparison of mechanical properties of iupilon novarex with other resisns is as shown in fig.
Additional mechanical tests on unidirectional glasspp composites with 0 wt% and 10 wt% ppgma showed only a small increase in fiberdominated properties such as longitudinal tensile strength and strain, whereas composite properties that are governed by the interphase, such as transverse, shear and compressive strength, showed significant. Recycled polypropylene rpp and lignin represent byproducts produced in enormous amounts worldwide that remain underutilized. This behavior makes it interesting for commercial and scientific fields to study methods for. Optimization of mechanical properties of polypropylene. Further with variable compatibilizer dosage its effect on the mechanical properties, thermal properties, barrier properties and microstructure of epdmpolypropylenenanoclay composites are reported. Glass fiber reinforced polypropylene mechanical properties. This research is directed towards obtaining the optimal values of mechanical properties of long. For such failure, the controlling material mechanical property is the elastic modulus. In this paper, the task of study of mechanical properties and dependence of polypropylene is done on a commercial pp based nonwoven material using various experimental techniques to establish the influence of the properties fibers. Similar curves are also observed in polystyrene7 and polypropylene on elongation and. Characterization, physical and mechanical properties of.
Mechanicalpropertiesof polymers kamyardavoudi october,20 materialsscienceseminar. Talc is a important filler for polypropylene pp and non halogen flame retardants ammonium polyphosphate is used with pp. Coefficient of linear thermal expansion homopolymer 4 6 x 105 inin f 8 10 x 105 cmcm c copolymer 3 5 x 105 inin f 6 9 x 105 cmcm c. Polypropylene offers ease of processing with excellent chemical resistance and good mechanical properties. Baharina comparison of the mechanical properties of rice husk powder filled polypropylene composites with talc filled polypropylene composites polym test, 21 7 2002, pp.
Peijs a,b a department of materials, queen mary, university of london, mile end road, london e1 4ns, uk. Also, you may want to use our plastic material selection guide or interactive thermoplastics triangle to assist with the material selection process based on your application requirements. Effect of clay types on the processing and properties of polypropylene nanocomposites. Mechanical properties of polypropylenenatural fiber.
Mechanical and thermal properties of polypropylene composites. Mechanical and morphological properties of polypropylene. The effect of the melt index of pp on the mechanical. The phase morphology of the blends was observed by scanning electron. Effects of wood fiber characteristics on mechanical. The sieved sisal powder shown in figure 1 was used as the reinforcement. Mechanical properties of polypropylenecalcium carbonate. It does not generate toxic gases and corrosive smokes during combustion. Physical and mechanical properties of materials melting temperature 9 density 10 youngs modulus 11 yield stress and tensile strength 12 fracture toughness environmental resistance 14 uniaxial tensile response of selected metals and polymers 15 iii. For chemically resistant plastic, view our chemical resistance of plastics chart. Polypropylenebased composites are widely used in the industrial field, especially in automotive applications, due to their excellent mechanical properties and low cost. The mechanical tensile strength and impact energy resistance and physical density and water absorption capacity properties of the composites were evaluated using 0% 40% of the. Effect of fibre orientation on the mechanical properties. Publishers pdf, also known as version of record includes final page, issue.
Mechanicalpropertiesof polymers harvard university. Polypropylene is a relatively easy materials to injection mould in spite of its semicrystalline nature. Perhapsthemostnatural test of amaterials mechanical properties is the tensiontest,in which astriporcylinderofthematerial,havinglengthlandcrosssectionalareaa,isanchoredatone end and subjected to an axial load p a load acting along the specimens long. The effectiveness of reinforcement essentially depends on the adhesion between matrix and fiber, so this is a key factor in determining the final properties of the composite material, particularly its mechanical properties 1,57. Various fibers are widely used as reinforcement in thermoplastic polypropylene pp matrix to prepare compo sites. Santos 58 optimized the mechanical properties of polypropyleneclay nanocomposites with combination of two different modified clays. Chemical and physical properties of polypropylene incca. Polypropylene pp technische universiteit eindhoven. The pseudoplastic nature of polypropylene enhances this effect at high shear rates fast filling rates. We then compared the properties of woodflourfilled composites to those of composites reinforced with refined wood fiber. Mechanical and thermal properties of polypropylene. For chemically resistant plastic, view our chemical resistance of. Mechanical properties and performance of materials samples of engineering materials are subjected to a wide variety of mechanical tests to measure their strength, elastic constants, and other material properties as well as their performance under a variety of actual use conditions and environments.
Mechanical and chemical properties of high density. The pppom blends were prepared by meltingblend with an internal mixer. Glass fiberreinforced polypropylene has improved dimensional stability, resistance to warpage, rigidity and strength. Typical properties of polypropylene pp astm or ul test property hpp hppfilled cpp cppfilled d792 specific gravity 0. Samples of wpcs were processed through melt compounding and hotpress moulding with different formulations of wood flour content and addition of coupling agent. It can mostly be found in battery cases and trays, bumpers, fender liners, interior trim, instrumental panels and door trims. As is well recognized, properties are typically higher for parts built in the xy plane, compared to properties in the z direction, since z direction properties depend entirely on filament bond strength. Experimental investigation of properties of polypropylene. Plastics occupy wide place in the applications of automotive, electronics and house goods. Typical reactions for chain assembling are polyaddition continuous or step wise and condensation polymerization polycondensation 1 figure 1. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. We also studied the effect of a maleated polypropylene coupling agent on composite properties.
Mechanical properties of polypropylene composites quazi th shubhra, akmm alam, and ma quaiyyum journal of thermoplastic composite materials 2011 26. Physical and mechanical properties of recycled polypropylene composites reinforced with rice straw lignin. This study examines some physical and mechanical characteristics of polypropylene pp and calcium trioxocarbonate iv caco3 composites prepared by melt blending. Pdf characterization, physical and mechanical properties.
Effects of molecular weight on mechanical properties of. Polypropylene is used in several household products and consumer goods applications including translucent parts, housewares, furniture, appliances, luggage, toys etc. Polymers mechanical properties pdf 1 approximate range of mechanical properties for various engineering. Polypropylene matrix was procured at a local market in. Physical and mechanical properties of polypropylene wood. Mechanical engineers calculate those forces and material scientists how materials deform elongate, compress, twist or break as a function of applied load, time, temperature, and other conditions. Composites science and technology 2006, 66 10, 12741279. Due to its low cost, outstanding mechanical properties and moldability, polypropylene is widely used in automotive parts. This study focuses on the improvement of the mechanical properties of wpcs through the addition of. Mechanical and thermal properties of polypropylene composites reinforced with lignocellulose nanofibers dried in melted ethylenebutene copolymer shinichiro iwamoto 1, shigehiro yamamoto 1, seunghwan lee 2, hirokazu ito 3 and takashi endo 1 1 biomass refinery research center, national institute of advanced industrial science and technology. The contents of pp were used at 10%, 20%, 30%, 70%, 80% and 90% by weight. Wood polymer composites wpcs were made with pine and polypropylene matrix pp.
117 70 1112 170 966 354 635 501 1143 669 1577 346 842 408 1561 63 521 373 206 1545 902 515 1088 763 1161 1256 1449 320