Physical properties of polystyrene pdf

Typically, properties of lightweight concrete have been compared with those of. By 1938 polystyrene was being produced commercially. 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. Styrofoam highload 40, 60 and 100 extruded polystyrene. Lightweight concrete this chapter covers some of the physical properties of lightweight concrete. This page shows summary ranges across both of them. Selected engineering properties and applications of eps. Flexibility in production allows eps to be produced to this standard or to other requirements that specialized applications may demand. For more specific values, follow the links immediately below. The synthesis of stereoregular polystyrene was only made possible by the discovery of the zieglernattatype catalysts for olefin polymerization in the early 1950s. Australian standard 66, part 3 1992 physical properties of rigid cellular polystyrene sets out minimum properties for six classes see table 1 and methods for determination and compliance.

On heating, the forces weaken further, and the chains slide past one another. For polystyrene, the dimer of styrene has high binding affinities with cyp2e1s, however, trimer and other high polymers were found hard to be docked into the cyp2e1s. Expanded polystyrene physical properties styrene products inc. This standard addresses the physical properties and performance characteristics of eps foam as it relates to thermal insulation in construction applications. Polystyrene board type eps eps eps foamular 150, xps eps foamular 250. Eps insulation is easily fabricated to meet specific design and dimensional requirements. Physical properties of expanded polystyrene eps federal specifications. 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.

Pdf mechanical properties of polystyrene olive stone flour. Raw material expanded polystyrene is made from expandable polystyrene, which is a rigid cellular plastic containing an expansion agent. Ps is a very good electrical insulator, has excellent optical clarity due to the lack of crystallinity, and has good chemical resistance to diluted acids and bases. Light weight comprised of about 98 percent air, expanded polystyrene is extremely lightweight, making it ideal for transport and installation. Mechanical properties and melt viscosity have been measured on anionc polystyrene of narrow molecular weight distribution and thermal polystyrene of broad molecular weight distribution in an attempt to study the effect of molecular weight distribution.

The effects of solar radiations on physical properties and molecular structures of 200 nm polystyrene nanospheres psn coated on silicon wafer were explored by field emission scanning electron microscope fesem and attenuated total. Physical properties of polymers include molecular weight, molar volume, density, degree of polymerization, crystallinity of material, and so on. Analysis and correlation between the collected physical quantities are presented. Physical chemistry chemical physics 2016, 18 47, 32022030.

Physical properties of polystyrene as influenced by temperature. Manufacturer the dow chemical company dow building solutions 200 larkin center midland, mi 48674 1866583blue 2583 fax 19898321465 dow chemical. Physical properties of polymers textile study center. Various inhouse services are available making elevation geofoam an easy choice. The physical properties of plastics are markedly in fluenced by ambient temperature, but comparatively. Request pdf physical properties of polystyrenealum composites the mechanical, thermal, optical and electrical properties of polystyrenealum. Now foamed by pentane or carbon dioxide gas, polystyrene is made into insulation and packaging materials as well as food containers such as beverage cups, egg cartons, and disposable plates and trays.

Physical properties of polymers chemistry libretexts. 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. Elevation geofoam is manufactured with closedcell expanded polystyrene eps and is in compliance with astm d6817, the standard specification for rigid cellular polystyrene geofoam. It quickly became one of the most important modern plastics, owing to the low cost of producing large volumes of styrene monomer, the ease of shaping the melted polymer in injectionmolding operations, and the optical and physical properties of the material. Crystal forms of the polymer polystyrene have low impact strength. Eps beads are loaded with a blowing agent, usually pentane, and other chemical agents and. The copolymer poly styrenecomethyl methacrylate psmma has higher clarity and improved chemical and uv stability.

Properties of polystyrene physical properties the density of polystyrene can vary from 10kgm3 to 50kgm3. The graph bars on the material properties cards further below compare ps to. Expanded polystyrene eps geofoam is a lightweight material that has been used in engineering applications since at least the 1950s. 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. Astm c578, types and physical properties for foamular. Expanded polystyrene structural foam fill elevation geofoam. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. Polystyrene homopolymer, known as crystal polystyrene in the trade, is an amorphous, colorless, and transparent commodity thermoplastic. Styrofoam highload 40, 60 and 100 extruded polystyrene insulation 1. The effect of free quenching on the mechanical, thermal, and thermophysical properties of polystyrene has been investigated. Three new onium salts have been used to prepare the nanocomposites, two are functionalized ammonium salts while the third is a phosphonium salt.

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. Study on enthalpy relaxation of polystyrene by assuming the existence of an intermediate aging plateau. The properties of ps include two common variations. Thermalite type 3 expanded polystyrene insulation table. The physical properties of polystyrene aggregated gypsum blocks polystyrene aggregated gypsum blocks b. Uv radiation has a slight effect on molded polystyrene.

Polymers range from familiar synthetic plastic such as polystyrene to natural biopolymers such as dna and proteins that are fundamental to biological structure and function. Solid polystyrene products include injectionmolded eating utensils, videocassettes and audiocassettes. The properties of the polymer depend strongly on the size of the particles, the rubber efficiency, i. Adapted from atsdr toxicological profile for styrene tables 4. For chemically resistant plastic, view our chemical resistance of. Foam polystyrene can be more than 95 percent air and is widely used to make home and appliance insulation, lightweight protective packaging, surfboards, foodservice and.

One of the most important styrene copolymers is poly styrenecoacrylonitrile psan. It causes superficial yellowing and friability, but does not otherwise effect its physical properties. An important property of extruded polystyrene is its buoyancy or ability to float in water. It has good thermal insulation properties with stiffness and compression strength comparable to. The volume resistively of molded polystyrene within the 1. Physical properties of polymers handbook springerlink. Polystyrene as first described in 1839 by simon and produced on an industrial scale since about 1930 is a completely amorphous material with an atactic structure see polystyrene and styrene copolymers. This is the reason polystyrene is highly elastic and softens when heated beyond its glass transition temperature. Eps possesses the physical and mechanical properties ideal for most insulation and specifications. Properties of eps eps has been a material of choice for over half a century because of its technical versatility, performance and cost effectiveness.

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. Eps is supplied to molders in the form of a polystyrene bead. Role of bulky pendant groups in affecting glass transition temperature. The mechanical properties, glass transition temperature, optical energy gap, dielectric constant and ac electrical conductivity of the composites sheets showed frequency and filler content dependence. Plastic material properties table mechanical, physical.

Electrical properties the volume resistively of molded polystyrene within the 1. Polystyrene polymers get degraded on exposure to sunlight, due to photo oxidation, which affects its mechanical properties. Block molding plants manufacture billets in varying densities, usually from 1. Eps specs physical properties of eps building code. Properties, performance and design fundamentals of expanded. It has much improved chemical resistance, better heat stability, and improved mechanical properties. 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. It is rigid, brittle, relatively hard and has excellent gamma radiation resistance, good electrical properties but has poor chemical and uv resistance. By tgaftir, both ammonium and phosphonium treatments have been shown to degrade by a hofmann. For complete details on properties and other quality requirements see the actual astm standard.

Pdf electrospinning of polystyrene and modification in. The mechanical properties of a polymer include its strength, elongation, modulus, impact strength, and toughness. Thermal properties of atactic and isotactic polystyrene. The physical properties of these three polymeric substances differ from each other, and of course from their monomers.

Physical properties of polymers handbook is a comprehensive and authoritative compilation that brings together data and supporting information from experts in the different disciplines contributing to the rapidly growing area of polymers and complex materials. Unfilled polystyrene is amorphous, and has a glassy, sparkling appearance. Electrospinning of polystyrene and modification in physical properties article pdf available in journal of the textile association october 2018 with 36 reads how we measure reads. Even though it is possible to mix polystyrene beads and gypsum without additives, better results are obtained by wetting the beads using a glue with a polymer. The effect of molecular weight distribution on the. A wellknown use of xps is the vacformed polystyrene trays used for small portions of food that we see in the supermarket. Astm standard, c 57808b thermal efficiency insulating power the thermal efficiency of an insulating material is expressed as rvalue.

It is rigid, but when heated to 100 celsius, it becomes a flowing liquid. Pdf thermophysical and mechanical properties of polystyrene. Designations used by companies to distinguish their products are often claimed as trademarks. The information is based on many laboratory studies and records of a large number of existing structures that have provided satisfactory service for more than 85 years. Product name styrofoam highload extruded load and flexural properties of blocktype polystyrene foam insulation 2. Journal of noncrystalline solids 2014, 402, 160165. Thermophysical and mechanical properties of polystyrene. Depending on the application it is used for, polystyrenes properties will change. All you wanted to know about the amazing properties of. The extruded polystyrene foam is a fine laminate that is only 23 mm thick. Ultimate guide on foam insulation material for several years, expanded polystyrene eps has been utilized as a material of choice in several food packaging applications, costeffective and energyefficient insulation in construction applications as well as cushion transport packaging material for shock sensitive goods and many more. The results of this study indicated that bioinformatics approaches might be useful tools to predict styrene and polystyrene affinities with mammalian cyp2e1s.

33 1083 1590 1143 991 812 456 1634 1265 1438 287 329 586 1636 386 968 1330 1152 1490 1656 329 497 102 384 123 1610 252 937 493 1027 1634 288 469 1650 629 302 822 1425 1144 603 1070 455 1398 470 149 53