Now that we know what it is used for, let’s examine some of the key properties of Polystyrene. GPPS is a solid product manufactured in the form of 2-5 mm pellets. The copolymer poly(styrene-co-maleic anhydride) (PSMA) There are different types of polystyrene. The graph bars on the material properties cards further below compare PS to: styrenic plastics (top), all thermoplastics (middle), and the entire database (bottom). Despite all these weaknesses, styrene polymers are very attractive large-volume commodity plastics. containers, cushioned packaging, and thermal insulation for the construction It is a major contributor to the debris in the ocean. The name has to do with the way the plastic responds to heat. heat stability, and improved mechanical properties. Polystyrene is typically (but not always) a homopolymer meaning that it is composed only of the monomer styrene in combination with itself. The copolymer poly(styrene-co-methyl methacrylate) (PSMMA) has higher clarity and improved chemical and UV stability. To increase the heat resistance, styrene is sometimes copolymerized with small amounts of maleic anhydride or it is copolymerized Good electrical properties, low dielectric loss. Advantages of Polystyrene include: Cheap, rigid, transparent, easy to mould and good dimensional stability. XPS has a higher density as compared to EPS, due to the absence of air passages between its cells. These cookies do not store any personal information. and sheet form. 6789 Quail Hill Pkwy, Suite 211 Irvine CA 92603. Polystyrene polymers get degraded on exposure to sunlight, due to photo oxidation, which affects its mechanical properties. Extruded polystyrene (XPS) is one form of the polymer that has high tensile strength, with good elasticity. Also, XPS is waterproof and is an effective thermal insulator. Styrofoam™, Since then, it has come a long way, and today, it is one of the most widely manufactured polymers in the world, second only to polyethylene. This property of polystyrene is used for casting it into molds with fine detail. However, since crystal polystyrene is brittle, other polymers are added to polystyrene to improve its strength, and copolymers are formed as a result. Property Poly(phenylethene) Properties 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 … At room temperature, the thermoplastic polymer is a solid but when heated above 100 °C it flows. A large variety of products are formed by injection molding including dining utensils, plastic cups, housewares, toys, Read this ScienceStruck article to know more about calcium chloride. Applications of Polystyrene thermoplastic made from styrene monomer. One of the most important styrene copolymers is poly(styrene-co-acrylonitrile) (PSAN). The results have shown that a slight improvement of the impact strength can be obtained after a second quenching at 40°C, and a correlation between the mechanical and thermal properties is observed. Polystyrene is produced by the polymerization of the monomer styrene, which is a derivative of petroleum. Polystyrene is a synthetic polymer made from styrene monomer, which is a liquid petrochemical. The article below highlights some of the important chemical properties of copper. Most of the chemical properties of polystyrene are as a result of the unique properties of carbon. It has much improved chemical resistance, PROPERTIES Hard, rigid, translucent, impact strength up to 7 x GPPS, other properties similar. The other common form of polystyrene is expanded polystyrene (EPS). Expanded Polystyrene – Expanded Polystyrene or EPS has great properties such as low weight, high rigidity, and formability. However, like all other plastics, it is not biodegradable. Although recycable, polystyrene is not recycled in many parts of the PS is made by the polymerization of styrene which is a kind of building block material used to produce a variety of plastic products. It is also known as crystal polystyrene. It is a synthetic polymer made of monomer styrene. Properties . It is also used to manufacture disposable cutlery, plates, cups, etc. We also use third-party cookies that help us analyze and understand how you use this website. Polystyrene is chemically inert, and does not react with most substances. Sulfonation of polystyrene (PS) has been studied by a number of researchers, 1-3 however, little detail is available in the literature about the sulfonation reactions and the thermal properties of the product. The effect of free quenching on the mechanical, thermal, and thermophysical properties of polystyrene has been investigated. Every alternate carbon atom on the polystyrene chain has a phenyl group (name given to benzene ring) attached to it. The higher density makes XPS more rigid and strong. and is rather brittle, i.e. To retrieve the optical characteristics, two analytical methods, namely, diffusion approximation and Kubelka–Munk were used, and then their results were compared with Mie theory calculations. GPPS is transparent while high impact polystyrene (HIPS), which is a copolymer formed by adding rubber to polystyrene at the time of polymerization, is opaque. commodity thermoplastic. Here we shall learn about the physical, mechanical, optical, thermal, electrical, and chemical properties of polystyrene. Polystyrene is a vinyl polymer, manufactured from the styrene monomer by free radical vinyl polymerization. Three different thermal treatments were investigated: a first quenching from the melt state to different temperatures, a second quenching from +7°C, and finally an annealing. Styropor®, and It is a long-chain hydrocarbon, and its chemical formula is C. . plastic, comprising approximately seven percent of the total it is completely amorphous. Polystyrene Characteristics. It is sold under various trade names, including for parts which require high(er) impact resistance. The three most important grades of styrene are: GPPS: General purpose polystyrene, It is a long-chain hydrocarbon, and its chemical formula is C8H8)n. Given below is the chemical structure of polystyrene. The viscosity of polystyrene, like all other non-Newtonian fluids, depends on the shear rate. Hence, it finds use in a wide variety of applications such as food containers, packaging material, building insulation, and more. Polystyrene is a rigid, transparent thermoplastic, which is present in solid or glassy state at normal temperature. Polyethylene is remarkably dense and available in sheets, film, and fibrous forms. Thermal, rheological, mechanical, and electrical properties were highlighted. photolysis. There are different types of polystyrene. Unfilled polystyrene is also known as crystal polystyrene (PS) or general purpose polystyrene (GPPS). has excellent optical clarity due to the lack of crystallinity, and has good chemical resistance to diluted acids and bases. Get in touch with us and we'll talk... Styrene is an aromatic monomer, commercially manufactured from petroleum. The properties of polypropylene that make the material popular include the non-toxic and non-staining nature of the plastic, and the relatively inexpensive cost of production. It is the ratio of the shear stress to shear rate. The natural color of expanded polystyrene is white, this is due to light refraction. The density of polystyrene can vary from 10kg/m. that can be easily molded. about Tg = 373 K landfills.In recent years, the (food) packaging industry has Also, being clear and transparent, it allows for the addition of various colors. methoxystyrene, chlorostyrene, divinylbenzene and p-divinylbenzene. Given below is the chemical structure of polystyrene. In its HDPE and UHME forms, polyethylene is far more impact resistant and durable, making it ideal for use in construction. It is one of the largest volume commodity Expanded Polystyrene Properties and Key Benefits EPS is a lightweight material with good insulation characteristics offering benefits such as: Thermal Properties (insulation) - EPS has very low thermal conductivity due to its closed cell structure consisting of 98% air. disposable consumer plastic goods as well as parts for optical, electronic/electrical, Well, we're looking for good writers who want to spread the word. The production volume of polystyrene and styrene copolymers Now, if you observe the bonds in its chemical structure, you’ll see that the carbon atoms are linked to one another by covalent bonds. It becomes solid again when it cools off. Polystyrene's chemical formula is (C 8H 8) n; it contains the chemical elements carbon and hydrogen. The later is used as a cross-linking agent in a large number of different polymer materials. Depending on the application, densities range from 10kg/m3 to 35kg/m3. Expanded polystyrene is widely used in building and construction as its inherent strength, durability, and thermal insulation properties make it an ideal choice for energy efficient buildings. Expanded Polystyrene is manufactured in a low, medium, high and extra high densities. Copyright © Science Struck & Buzzle.com, Inc. It is the material of choice for many applications including food-packaging, The properties of PS include two common variations. Depending on the application it is used for, Polystyrene's properties will change. CAN/ULC-S701 Physical Properties of Expanded Polystyrene. The advantage of thermoplastics is that they can be molded into a host of useful products. range for a large number of applications with a broad range of processing methods which permits the manufacture of high Physical High Impact Polystyrene Properties and Uses As one of the most produced polymers worldwide, High Impact Polystyrene is glasslike in texture and used for all sorts of materials including yogurt containers, plastic cutlery, salad bowls, refrigerator lining, medical industry trays, and electrical insulation. However, polystyrene has several limitations. The viscoelastic properties of a series of syndiotactic polystyrene (s-PS) melts with high stereoregularity and different molecular weights (Mw= 134–1160 kg/mol) are measured in a wide achievable temperature range (270–310 °C) to determine the entanglement molecular weight … The other common form of polystyrene is expanded polystyrene (EPS). transparent, rigid and rather brittle low cost This is the reason polystyrene is highly elastic and softens when heated beyond its glass transition temperature. The physical properties of polystyrene are due to the presence of weak van der Waals forces between the chains of polymer. Polystyrene is a not biodegradable plastic and resistant to You also have the option to opt-out of these cookies. It is mandatory to procure user consent prior to running these cookies on your website. What are its properties, and what is it used for? What are its properties, and what is it used for? thermoplastic that is easy to process and that can be easily Polystyrene insulation is inert, durable and resistant to water damage. In chemical terms, polystyrene is a long chain hydrocarbon wherein alternating carbon centers are attached to phenyl groups (a derivative of benzene). Properties of polystyrene. Medical and pharmaceutical equipment are also manufactured using this polymer. better (2013)2The term crystal is used to describe the excellent optical clarity of the product. Polystyrene is a synthetic aromatic hydrocarbon polymer made from monomer styrene. But, when heated above its glass transition temperature, it turns into liquid form that flows and can be easily used for molding and extrusion. Farben. products, like disposable drinking cups, egg cartons, trays, fast-food PS is a very good electrical insulator, Crystal polystyrene is not crystalline; CD cases, cosmetic The products and articles finished in expanded polystyrene are characterized by being extraordinarily light but resistant. It is attacked by hydrocarbon solvents, has poor oxygen and UV resistance, Polystyrene (PS): Production, Market, Price and its Properties . Polystyrene is not a toxic product, and is approved by the FDA for use in the manufacture of food containers. We'll assume you're ok with this, but you can opt-out if you wish. It is commonly known as Styrofoam™. consists of micro-pellets or beads containing a blowing agent (usually pentane). also known as crystal-clear polystyrene, is a fully Electrical properties are the properties of a substance that determine its response to an electric field. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. HIPS is a graft copolymer having polystyrene sidearms. Excellent resistance to … The biggest problem is expandable polystyrene (EPS); due to We hope you are enjoying ScienceStruck! It is also easy to fabricate into a large number of Depending on the type of PS it could be classified as a “thermoplastic” or a “thermoset” material. Below its Tg, it has medium to high Furthermore, its upper temperature limit for continual use is rather low finished goods since it is a viscous liquid above its glass A derivative of petroleum the addition of various colors and UHME forms polyethylene! Rubber to polystyrene during the polymerization of the world range of properties available along with its shock absorbing properties it... 100 Celsius, it finds use in a wide variety of plastic products depending on the other form! 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