Properties of hdpe can be further manipulated by the addition of organic or inorganic particles into the polymer matrix. Interstate plastics marine board xl is a lighter, more economical version of the popular marine board. Pvc is an atactic polymer and therefore essentially uncrystallized. From a view of the bridge maintenance and management, this. Hdpe materials inventor autodesk knowledge network. The definition of stress cracking according to astm d883 is an external or internal crack in a plastic. Mdpe has good shock and drop resistance properties. Astm d5702 mechanical properties hardness, shore d 70 70 astm d2240. Polyethylene has excellent toughness and cut and wear resistance. Adobe acrobat reader dc software is the free global standard for reliably viewing, printing, and commenting on pdf documents. Pdf mechanical properties of high density polyethylenemodified. Product safety assessment high density polyethylene hdpe.
Resins that are produced without comonomer are called homopolymers. Property standard unit pe100 pe 100 material properties. Costeffective hdpe is a thermoplastic known for its high strengthtodensity ratio. High density polyethylene lends itself particularly well to blow molding, e. Important information high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. The density and molecular weight distributions control the properties of hdpe. Hdpe high density polyethylene after its experimental preparation in the 1930s, the application in high frequency radar cables during world war ii, gave impetus to its commercial production. Hdpe is commonly recycled, and has the number 2 as its recycling symbol. It is an enormously versatile polymer which is suited to a wide range of applications from heavyduty damp proof membranes for new buildings to light, flexible bags and films. Find, read and cite all the research you need on researchgate. Mechanical properties of hdpe m624 with three filler inorganic and organic composites were assessed with respect to the effect of the filler content. Mechanical properties of high density polyethylene. For more specific values, follow the links immediately below.
Material safety data sheet high density polyethylene hdpe. Methods of recycling, properties and applications of. Hdpe is easily machined, welded and thermoformed for easy fabrication. Hdpe high density polyethylene is defined by a density of greater or equal to 0. Properties and applications of hdpe or high density polyethylene. February 26, 2014 the dow chemical company page of 7 blow molding resellers, 32% compounders, distributors 19% injection molding 16% film 14%14% pipe, conduit sheet 4% wire, cable 1% u. The physical properties of hdpe can vary depending on the molding process that is used to. Mediumdensity polyethylene mdpe is a type of polyethylene defined by a density range of 0. Polymers free fulltext improvement of rice huskhdpe. And now, its connected to the adobe document cloud.
Hdpe, pp, ps, pvc, nylon, pmma, pc, abs, pet characteristics. Comparative studies have been made on the mechanical properties of high density polyethylenepolypropylene. However, flexural property of hdpe reduced quite significantly with the additives. Mechanical properties of high density polyethylenechromium. Low density polyethylene ldpe is a semirigid and translucent polymer.
Highdensity p olyethylene hdpe, low density polyethylene ldpe and linear low density polyethylene lldpe. Other common polyethylene pe materials are mediumdensity polyethylene mdpe. The flow properties of viscoelastic fluids depend on temperature, strain rate and observation time. Analysis of the temperature effect on the behavior of high density.
Hdpe manufactured by opal shall meet the requirement stipulated in is. Typical properties of hdpe astm test method english units metric units physical properties density d1505 59. Its the only pdf viewer that can open and interact with all types of pdf content, including. Marley also offer a fabrications services, where stacks can be built. The high degree of branches with long chains gives molten ldpe unique and desirable flow properties. The following is a list of standards which may be referenced in this section. Mechanical properties of filled high density polyethylene. For evaluating the tensile properties of hdpeplla blends and analyzing the. We only use the material list to inform visitors that we are experienced in processing these materials for many fine products. The changes of structure and properties of the blends were investigated by ftir, melt flow index, mechanical properties, dynamic rheological measurement, dsc, and waxd. It is particularly suited for commercial applications or where a product with high impact or abrasion resistance is required. History and physical chemistry of hdpe atoms, and consequently, the greater the molecular weight. Polyethylene high density hdpe polyethylene polythene is one of the worlds most popular plastics.
Coefficient of thermal expansion is over 10 times that of di and steel and 3 times that of pvc. Technical note pp 841tn pressure capability of hdpe pe4710. Although the density of hdpe is only marginally higher than that of lowdensity polyethylene, hdpe has little branching, giving it stronger intermolecular forces and tensile strength than ldpe. In practical terms, this means hdpe pipe shrinks 10 times as much as di and 3 times as. Cracking resistance escr and why escr is an important resin property. High density polyethylene hdpe is a longchain polymer or plastic. Its original purpose was for research and dissection of pdf based malware, but i find it useful also to investigate the structure of completely benign pdf files. Sep 24, 20 the structure and properties of hdpeuhmwpe blends prepared through a pan. This thermoplastic is available in a range of flexibilities depending on the production process. Pdf high density polyethylene hdpecalcium silicate cs composites containing. Figure 16 is a photograph of various pe bottle designs and applications. Hdpe is a stable material due to its carboncarbon bonds, causing their slow degradation. The effect of ultrahigh molecular weight uhm species greater than 106 in highdensity polyethylene hdpe on the time to creep failure by a surface active agent saa i. It is less dense than hdpe, which is more common mdpe can be produced by chromiumsilica catalysts, zieglernatta catalysts or metallocene catalysts.
Polyethylene pe is a thermoplastic material, made from the polymerization of ethylene or ethene monomer. Mechanical properties value unit dineniso tensile strength at yield 25 mpa 527d638 elongation at yield 9 % 527 modulus of elasticity in tension mpa 527d638 modulus of elasticity in flexure 1400 mpa 178d 790. Tensile properties of hdpe remained almost the same with and without the additives. Select mechanical or inflatable pipe plugs based on the below pipe id and along with the pressure to be blocked. The physical properties of the obtained pyrolytic oil were close to those of mixture of. The physical properties of the pyrolytic oil show the presence of a. Highdensity polyethylene hdpe is the most common household packaging material due to its low resin cost and easy formability. The density of hdpe can range from 930 to 970 kgm 3. Effects of microstructure on creep characteristics by joy j. It will also describe some of the tests used to measure escr in hdpe products and how resin properties influence escr. Low density polyethylene ldpe high degree of short and long chain branching density 30. Hdpe plastic cutting board and hdpe sheet, rod, and tube.
Pdf mechanical and morphological properties of high density. Pp linear or branched structure easy to process with application of heat heat sensitive properties individual polymer molecules are held together by weak secondary forces. Rheological and thermal behavior of highdensity polyethylene. Plastic properties of high density polyethylene hdpe a linear polymer, high density polyethylene hdpe is prepared from ethylene by a catalytic process. Cheng a thesis presented to the university of waterloo in fulfillment of the thesis requirement for the degree of doctor of philosophy in.
Regardless of process type, the chemical process is the same. Hdpe highdensity polyethylene properties definition highdensity polyethylene hdpe or polyethylene highdensity pehd is a polyethylene thermoplastic made from petroleum. Consumption of hdpe resin 2007 4 directivesregulations. Hdpe has a low degree of branching and thus stronger intermolecular forces and tensile strength. Compared to hdpe, it has a higher degree of short and long sidechain branching. D1248, standard specification for polyethylene plastics extrusion materials for wire and cable. Pressure capability of hdpe pe4710 and pvc pipe too frequently, the comparison between high density polyethylene hdpe and polyvinyl chloride pvc pipe is made primarily on pressure class pc. Material safety data sheet high density polyethylene.
High density polyethylene physical properties metric. Work on documents anywhere using the acrobat reader mobile app. Hdpe 100 pipes used safely in pressure water drinking water projects, gas distribution projects, petroleum distribution projects, irrigation projects, industrial waste, hdpe fire fighting systems, hdpe dredging pipe projects all kinds of liquid and gas transportation. Hence, in view of better retention of mechanical properties, we.
High density polyethylene manufacturing process sciencing. Properties of hdpe pipe high density polyethylene pipe hdpe has several properties that make it very different from traditional water works pipe materials. The compressive tests have been performed on an electromechanical instron test machine on. The chemical analysis of the hdpe pyrolytic oil showed the presence of functional groups such as. Typical engineering properties of high density polyethylene. Thermolysis of highdensity polyethylene to petroleum products. The absence of branching results in a more closely packed structure with a higher density and somewhat higher chemical resistance than ldpe. The molecular weight, the molecular weight distribution and the amount of branching determine many of the mechanical and chemical properties of the end product.
In prac tical terms, this means hdpe pipe shrinks 10 times as. Many kinds of polyethylene are known, with most having the chemical formula c 2 h 4 n. Study on the mechanical properties of stay cable hdpe. The properties of hdpe are controlled by the density, and molecular weight distributions. Milk jugs and other hollow goods manufactured through blow molding are the most important application area for hdpe. High density polyethylene physical properties metric english. Petersen does not sell pipe pressures based on ambient temperature water 73f these are general specifications only and can vary by manufacturer. With a high strengthtodensity ratio, hdpe is used in the production of plastic bottles, corrosionresistant piping, geomembranes and plastic lumber. Properties and applications of hdpe or high density.
Polyethylene is the most common form of plastic in the world and can be processed in a number of ways to make it thin, flexible, fluffy or strong and hard such as with hdpe. As a result, its melt viscosity is extremely high and normally can only be processed by powder sintering methods. Pdf polyblend films were prepared from highdensity polyethylene hdpe. Hdpe is used to make bottles for fruit juice, milk, water, kitchen cleansing products and even furniture.
Chapter 3 material properties 47 chemical structure, which are reflected in certain differences in properties, such as density, ductility, hardness, etc. The properties of hdpe include three common variations. Material properties specific material properties pe property standard unit pe100 specific density at 23c iso 1183 gcm3 95 melt flow index iso 13 g10min 0,3 mfr 1905 iso18721873 properties of hdpe m624 with three filler inorganic and organic composites were assessed with respect to the effect of the filler content. High density polyethylene hdpe sheet is designed to be used in the manufacturing and food processing industry as it is moisture, stain, and odor resistant.
Among the rheological properties, viscosity is one of the most commonly utilized parameters in the study of polymeric material behavior during processing, once the majority of transformation processes occur in shear flows. The graph bars on the material properties cards further below compare hdpe to. A simple pyrolysis reactor system has been used to pyrolyse waste hdpe with the objective of optimizing. Hdpe is used in a variety of applications and industries where high tensile strength, low moisture absorption and chemical and corrosion resistance properties are required. Its easy to add annotations to documents using a complete set of commenting tools. Obvious improvement in the mechanical parameters was recorded depending on the filler type and mesh size. Khalaf chemistry department, college of science, university of basrah, p. The filler varied from 5% to 25% by weight in the composite. With acrobat reader dc, you can do more than just open and view pdf files. To avoid improper resin selection, contact pmc for additional help in determining the exact engineering resin required for your application.
Highdensity polyethylene hdpe or polyethylene highdensity pehd is a thermoplastic polymer produced from the monomer ethylene. Mechanical and chemical properties of high density. It is sometimes called alkathene or polythene when used for hdpe pipes. Hdpe natural pe300pehwst high density polyethylene colour.
Pe is usually a mixture of similar polymers of ethylene, with various values of n. Highdensity polyethylene hdpe or polyethylene highdensity pehd is a polyethylene thermoplastic made from petroleum. Typical reactions for chain assembling are polyaddition continuous or step wise and condensation polymerization polycondensation 1 figure 1. Hdpe plastic data sheet at curbell plastics high density. It has been used in recent years for garden furniture as it resists the weather and can be cleaned very easily. Peepdf is a pythonbased tool which helps you to explore pdf files. Additives incorporated in this product shall conform to the positive list of constituents as prescribed in is. Of possible use of hdpe as thermal storage material in thermal storage type solar cookers pdf. Mechanical and morphological properties of high density. Smithersrapramediasample chaptersrecycledpolymerspropertiesandapplications,volume2. May 11, 2001 polyethylene is a whitish, semicrystalline, and effectively opaque engineering thermoplastic which, chemically, is a very high molecular weight 36 million hdpe.
Product safety assessment high density polyethylene hdpe resins. Hdpe s low rate of degradation is one of the reasons that new alternatives for disposal reduction. High density polyethylene an overview sciencedirect. Hdpe is known for its high strengthtodensity ratio. Herein, we proposed a simple and effective method to enhance the interfacial adhesion properties of rice husk fibre and high density polyethylene hdpe composites by the silane coupling agent kh550 and compatibilizer maleic anhydride grafted polyethylene mape with complementary modification. Its packed with all the tools you need to convert, edit, and sign pdfs. High density polyethylene physical properties metric english comments specific gravity 0. Polyvinyl chloride pvc physical and mechanical properties. The marley hdpe drainage range is certified to bs en 1519. However, it sometimes happens that, locally, over short chain segments, pvc is syndiotactic and can assume the crystalline phase, but the percent shear fracture never exceeds 10 to 15 %. Injection molding grades typically have a narrow molecular weight distribution. The ldpe is composed of 4,00040,000 carbon atoms, with many short branches. However, there are fundamental material differences between hdpe and pvc that should be considered during design.
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