The copolymer poly styrenecomethyl methacrylate psmma has higher clarity and improved chemical and uv stability. Polystyrene insulation is inert, durable and resistant to water damage. Typical properties of copolymer polypropylene as used in. As a hard, solid plastic, it is often used in products that require clarity, such as food packaging and laboratory ware. It is an aromatic polymer made from the monomer styrene, a liquid hydrocarbon that is manufactured from petroleum by the chemical industry. Here it is intended to investigate the potential influence that a range of ingredient parameters have on the mechanical properties and thermal performance of eps. One of the most important styrene copolymers is poly styrenecoacrylonitrile psan. It is rigid, but when heated to 100 celsius, it becomes a flowing liquid. Here we shall learn about the physical, mechanical, optical, thermal, electrical, and chemical properties of polystyrene.
The research used 30% volume of eps to replace natural coarse aggregate to. Styrofoam highload 40, 60 and 100 extruded polystyrene insulation 1. Some samples showed an improvement of barrier properties. Depending on the application it is used for, polystyrenes properties will change. Focus has been shifted in the past decade to polymers in thin film geome.
Styrofoam highload 40, 60 and 100 extruded polystyrene insulation. An evaluation of the water absorption and density properties. Polystyrene simple english wikipedia, the free encyclopedia. Sw, suite 2100 calgary, ab t2p 5h1 1866583blue 2583 english 18003636210 french 3. Properties, performance and design fundamentals of expanded polystyrene packaging expanded polystyrene expanded polystyrene eps is a generic term for polystyrene and styrene copolymers that are expanded into a variety of useful products. Manufacturer the dow chemical company dow building solutions 200 larkin center midland, mi 48674 1866583blue 2583 fax 19898321465 dow chemical. Polystyrene properties include a low density and high stiffness in foamed applications and low. Investigations of the influence of polystyrene foamed. Now that we have seen the structure of polystyrene, let us delve a little deeper into its properties. The improvement of this property was obtained at the expense of other properties such as the elastic modulus, density, hardness, and the heat. Raw material expanded polystyrene is made from expandable polystyrene, which is a rigid cellular plastic containing an expansion agent. These properties are given as reference without any obligation or liability on behalf of precision punch and plastics. Astm standard, c 57808b thermal efficiency insulating power the thermal efficiency of an insulating material is expressed as rvalue. Evaluated are the mechanical properties in terms of density.
Eps is supplied to molders in the form of a polystyrene bead. Polystyrene is a form of chemical compound that is mainly used for a wide variety of packaging. Lightweight polystyrene foam provides excellent thermal insulation in numerous applications, such as building walls and roofing, refrigerators and freezers, and industrial cold storage facilities. Like all cellular polymers, this product will degrade upon prolonged exposure to sunlight. The toughness of highimpact polystyrene increases with increasing rubber content. Pdf mechanical properties of polystyrene olive stone flour. A wellknown use of xps is the vacformed polystyrene trays used for small portions of food that we see in the supermarket.
No assurance can be implied that all molded articles will have the same properties as those listed. Three different thermal treatments were investigated. Expanded polystyrene physical properties expanded polystyrene has a flame spread index of 20 and a smoke developed index of 150300 when tested in accordance with astm e84ul 723 for densities from 0. Properties of eps eps has been a material of choice for over half a century because of its technical versatility, performance and cost effectiveness. Our quality polystyrene sheets are characterized by high heat resistance and good stress cracking resistance. Expanded polystyrene is widely used in building and construction as its inherent strength, durability, and thermal insulation properties make it. It is rigid, but when heated to 100 celsius, it becomes a. Enhancement in mechanical properties of polystyrene filled. Physical properties styrofoam panel core 30 extruded polystyrene foam insulation exhibits the properties and characteristics indicated in table 2 when tested as represented. General properties 1 qenos technical guides 7 structural differences between the polyethylenes the variations in chemistry between the processes produce important differences in the structure, and consequently the final properties, of the various polyethylenes. Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on. Canulcs701 physical properties of expanded polystyrene. Description of the expanded polystyrene product contexture and structure has been given. Mechanical properties of expanded polystyrene lightweight.
As the name suggests, this is a solid material not suited for packaging applications. Material properties of polystyrene and polymethyl methacrylate. Thermosetting polymers become permanently hard at elevated temperatures and pressures. Properties, performance and design fundamentals of. Polystyrene drinkware has an excellent moisture barrier, excellent optical clarity in general purpose form. It is widely employed in the foodservice industry as rigid trays and containers, disposable eating utensils, and foamed cups, plates, and bowls.
Expanded polystyrene eps is commonly used for insulation and packaging. Many bulk polymer properties have been well defined in the recent literature 23. Can be printed offset lithography, screen, uv digital and flexography. Crushed polystyrene foam waste with a fill density of.
Technical data sheet polystyrene sheets high impact polystyrene from styrene butadiene with very good mechanical properties and highly resistant to cold. In this paper, the evaluation of the mechanical and hygrothermal properties of expanded polystyrenesanded lightweight concrete epslc was examined. Polystyrene, polyethenylbenzene, lustrex, styron, vestyron, styrofoam. A foamed form of polystyrene is used to make coffee. The density of polystyrene can vary from 10kgm 3 to 50kgm 3. All of our polystyrene and pmma polymethyl methacrylate microspheres are solid, nonporous polymer bead products.
The graph bars on the material properties cards further below compare ps to. Expanded polystyrene physical properties styrene products inc. The influence of process parameters on product properties was analysed. Polystyrene also is made into a foam material, called expanded polystyrene eps or extruded polystyrene xps, which is valued for its insulating and cushioning properties. Depending on the application it is used for, polystyrene s properties will change. Barrier properties of filled highimpact polystyrene. Generalpurpose polystyrene gpps highimpact polystyrene. It is widely used in many everyday applications where its light weight, strength, durability, thermal insulation and shock absorption characteristics provide economic, high performance products. In chemical terms, polystyrene is a long chain hydrocarbon wherein alternating carbon centers are attached to phenyl groups a derivative of benzene.
Polymorphism and mechanical properties of syndiotactic. The results have shown that a slight improvement of the impact strength. No information supplied by rtp company constitutes a warranty regarding product performance or use. Generalpurpose polystyrene is clear, hard, and rather brittle. It causes superficial yellowing and friability, but does not otherwise effect its physical properties. Its unique silvergray color and exceptional insulation characteristics are a result of highpurity graphite that reflects and absorbs radiant energy. Polystyrene is one of the most widely used plastics, the scale being several billion kilograms per year. No information supplied by rtp company constitutes a. Highimpact polystyrene, composite, nanocomposite, nanofiller, gas permeability, water permeability. Light weight comprised of about 98 percent air, expanded polystyrene is extremely lightweight, making it ideal for transport and installation. A covering may be used to block ultraviolet radiation and prevent degradation. Polystyrene synthesis styrene monomer polystyrene, in syndiotactic form synthesized by addition polymerization via free radical formation. Three different types of samples s1, s2, and s3 were prepared to observe the behaviour of cement pastes after the addition of different doses of foam in. Validation of the polystyrene cg model the ps model described above had been developed and validated against the properties of ps in the.
The different branching structures for ldpe, lldpe and hdpe are illustrated in figure 2. The properties of ps include two common variations. Foam polystyrene can be more than 95 percent air and is widely used to make home and appliance insulation, lightweight protective packaging. When it burns, a kilogram of polystyrene will release more energy than a litre of petrol. Synthetic polymers are a mainstay of modern life, but nature also makes polymers. Polystyrene ps is a clear, amorphous, nonpolar commodity thermoplastic that is easy to process and that can be easily converted into a large number of semifinished products like foams, films, and sheets. Ps finds a wide range of application from food contact packaging to thermal insulator in.
A precise knowledge of the physical properties mechanical, thermal, electrical, solvent resistance, etc. Medical due to its clarity and ease of sterilization, polystyrene is used for. Properties, performance and design fundamentals of expanded. A versatile, cost effective extruded polystyrene that can be used in a variety of applications. Product description styrofoam brand sm extruded polystyrene foam insulation is a multipurpose extruded polystyrene board. Jun 18, 2015 foamex polystyrene building products make a major contribution to the quality, safety, and costeffectiveness of construction as well as contributing to the sustainability of completed projects. Polystyrene is also a thermoplastic and has a very poor reaction to. It has much improved chemical resistance, better heat stability, and improved mechanical properties. This paper deals with the behaviour of cement paste upon the addition of crushed polystyrene foam. A list of material properties for bulk general purpose polystyrene and pmma from the. In addition, theories that offer reasoning for changes in these bulk properties with tem perature, pressure, etc.
Polystyrene, an addition polymer polystyrene is used to make many types of containers such as videocassette cases, compact disk jewel boxes, tableware forks, knives and spoons, and cafeteria trays. Physical properties of expanded polystyrene astm c578 property type xi type i type viii type ii type ix type xiv type xv nominal density lbft. Manufacturer dow chemical canada ulc dow building solutions 4501st st. Torres, john, mechanical properties of polystyrene and polypropylene based materials after exposure to hydrogen peroxide. The selection of mix proportions is the process of choosing suitable ingredients of concrete and determining their relative quantities with the object of producing as economically as possible concrete of certain minimum properties. High impact polystyrene is a promising material for mechanical recycling since its properties are not extremely. In solution or modified bulk polymerization, the reaction takes place as the monomer is dissolved in a small amount of solvent, such as ethylbenzene. Polystyrene, a hard, stiff, brilliantly transparent synthetic resin produced by the polymerization of styrene.
Highimpact polystyrene displays a less steep initial rise in the curve and, after reaching the yield point, pronounced deformation until rupture. Product name styrofoam highload extruded load and flexural properties of blocktype polystyrene foam insulation 2. Both the atomistic left and cg right representation of a ps trimer are shown. The volume resistively of molded polystyrene within the 1. Polystyrene has significant stiffness in both foamed and rigid forms. Our hips can be used in point of purchase displays, instore signage, food and medical trays, horticultural signage and tags. Performance properties of extruded polystyrene foam xps insulation in general, the physical properties of xps products are best characterized by using the material standard for rigid, cellular polystyrene foams. The blowing agent may be added during the polymerization process as in the production. The extruded polystyrene foam is a fine laminate that is only 23 mm thick. Polystyrene is a versatile plastic used to make a wide variety of consumer products. Datasheet for typical physical properties of extruded polystyrene xeps or styrofoam from universal foam products. This page shows summary ranges across both of them. This behavior is characteristic of tough materials. Polymers polymers are the giant molecules of chemistry.
Pdf this work aims to study the effect of the incorporation of natural fibers on the mechanical properties of materials plastics composite. Thermophysical and mechanical properties of polystyrene. Typical properties of copolymer polypropylene as used in propylex sheet typical properties test method unit value physical properties density iso 1183 gcm3 0. Properties may be materially affected by molding techniques applied and by the size and shape of the item molded. Permastat 400 polystyrene ps product data sheet rtp company. Material properties and averages can vary from one manufacturer to another.
In this paper, the evaluation of the mechanical and hygrothermal properties of expanded polystyrene sanded lightweight concrete epslc was examined. Styrofoam highload 40, 60 and 100 extruded polystyrene. Here, an overview of synthesis, properties and applications of amphiphilic copolymers containing at. Polystyrene is one of the most widely used plastics, the scale being several billion kilograms per year polystyrene can be in either a thermoset or a. Greenguard gold certified, basf neopor gps is a graphite polystyrene gps rigid foam insulation that gives maximum efficiency, costeffectiveness and sustainability on construction projects. Role of bulky pendant groups in affecting glass transition temperature. The small buildingblock molecules are called monomers.
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