Items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from ps. Highdensity polyethylene products are very safe and are not known to transmit any chemicals into foods or drinks. Plastic material properties table mechanical, physical. Engineering plastic properties reference supply services. Properties of engineering materials each material has a property profile. 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. Types of plastics pdfproperties of thermosetting plastics. Variations may occur as far as cases and technical parts are concerned. The properties of engineering materials can be classified into the following main groups.
The properties of materials and their everyday uses children need to have experience of, and explore as many different materials substances as possible in order to make sense of their world. Ask the children to choose two groups to sort the materials into. Oct 22, 2018 a thermoplastic is a plastic material that becomes moldable above a specific temperature and solidifies upon cooling. Epoxy glass epoxy glass is a plastic material that is made from an epoxy resin and fiberglass cloth. Thermoplastics are in the application range of hard or tough elasticity and can be. Once liquid form is achieved precaution is needed to avoid burning of plastic. In the 1930s, bakelites easily mouldable properties were ideal for designers looking for new materials for cheap domestic products. Pdf properties of building and plastic materials in the thz. It is transparent, flexible, resistant to water and electricity. This table summarizes a wide variety of properties and characteristics for each material. Although a high molecular weight is necessary to obtain useful properties such as stiffness and strength in a plastic material, it also means that the material is difficult to process. The physical properties can also be further grouped into categories. The properties of materials resource rsc education.
Introduction to materials science, chapter 6, mechanical properties of metals university of tennessee, dept. Each one of our plastic materials has listed on its own product page an engineering plastic properties guide for reference. 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. Physical and mechanical properties of materials melting temperature 9 density 10 youngs modulus 11 yield stress and tensile strength 12. Dislocations and plastic flow 5 fast fracture 6 statistics of fracture 6 fatigue 7 creep 7 diffusion 8 heat flow 8 ii. Plastic material properties table mechanical, physical, thermal. The society of the plastics industry spi established a classification system in 1988 to allow consumers and recyclers to identify different types of plastic. Plastics are part of everyday life and contribute immensely to the benefit of humanity. Curbell plastics supplier of high quality thermoplastic materials, technical assistance, custom plastic fabrication subject. Plastic barrier properties comparison barrier performances of plastics are typically described as the capability of the plastic film or enclosures to keep out the transmis sions of low molecule gas, such as o2, co2, and n2, water vapor, fragrance and other organic solvents. This may force the industry to go for plastic materials by which the cost can be reduced to an extent. Practice problems materials properties 20 minutes to take. For chemically resistant plastic, view our chemical resistance of.
To enhance the mechanical properties, and water barrier properties, it can be blended easily with other polymer as well as nano fillers. Properties of plastic materials combustibility test for plastics according to ul subject 94 the plastic materials are classified as follows. Low density polyethylene ldpe high degree of short and long chain branching density 30. The plastic is often used as an insulator for electronics and in the automotive industry. Properties of building and plastic materials in the thz range article pdf available in international journal of infrared and millimeter waves 285. Apr 09, 2018 plastic has a number of properties that make it a highly useful material. Pdf mechanical properties of materials hamza adeeb. Glass transition temperature the temperature at which a materials characteristics change from that. Use our interactive properties table below to explore by property group, sort, or compare two or more plastic materials. For example, tensile properties of plastics such as plastic tensile strength and rigidity can be determined according to din en iso 527 by briefly applying load in one direction with a tensile test. Typical reactions for chain assembling are polyaddition continuous or step wise and condensation polymer ization polycondensation 1 figure 1. Thermal properties of plastic materials material formula coefficient of thermal expansion x106 k1 heatdeflection temperature 0. The seventh edition of this classic reference work once more provides a comprehensive overview of commercially available plastics materials.
Properties mechanical chemical electrical physical b. Dynamics and statics we all have some intuitive idea about the mechanics of the world around us, an idea built up largely from our own experience. Code 7 is used to designate miscellaneous types of plastic not defined by the other six codes. These materials make up the objects around us, and each of these materials has different properties or characteristics that can be observed or tested. Easy descriptions of typical, physical, thermal, optical, electrical properties. Typical reactions for chain assembling are polyaddition continuous or step wise and condensation polymerization polycondensation 1 figure 1. Plastic materials plastic properties plastic fabrication. The plastic and packaging material used by okw are on the whole harmless and, apart from some exceptions, can easily be recycled and reutilized. Properties combined with excellent appearance, including the possibility of self coloring. But there are still concerns over the desired mechanical properties, biodegradability, sterilizability and radiopacity of the materials. For less able children provide a copy of the sheet at the end of the chapter. But there are still concerns over the desired mechanical properties, biodegradability, sterilizability and radiopacity of the materials used that need to be looked at in detail.
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 axis at the other. Select two or more materials and then press compare materials. Properties include improved toughness, chemical resistance, impact strength. Properties of glass materials 3 that occurs above the glasses melting point the liquidus line is known as stable immiscibility, whereas phase separation at temperatures below the liquidus is. The aim of this article is to give an overview about the plastic materials. Words like big, long or yellow are things that can be changed and do not describe the properties of the materials. Chapter outline mechanical properties of metals how do. For these proper vessels is required for slow and steady melting of. Plastic materials properties and applications birley. Click the down or up arrows triangles or column headings to sort plastic materials or material properties. Polystyrene is commonly recycled, but is difficult to do. Plastic selection guide for material selection for your application.
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. Temperature, cost, mechanical properties, electrical insulation, fda, chemical resistance. Materials science is the study of solid matter, inorganic and organic. Yielding elastic plastic stress strain yield strength. They will be called tensile modulus, also known as plain modulus, flexural modulus or torsional modulus. In this article, i will be explaining the top 10 properties of thermoplastic materials in a detailed manner. Identify and name a variety of everyday materials including wood, plastic, glass metal, water and rock. Caused by the macromolecular structure and the temperaturedependent physical properties plastic materials are distinguished into different classes. An overview of the plastic material selection process for. We stock a large range of high performance plastics, engineering plastics, standard commodity type plastics and industrial composites. Compare and group everyday materials on the basis of their properties, including their hardness, solubility, transparency, conductivity electrical and thermal and response to magnets.
Items made from this plastic include containers for milk, motor oil, shampoos and conditioners, soap bottles, detergents, and bleaches. Often materials are subject to forces loads when they are used. 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. Introduction to materials science chapter 6, mechanical properties 14 tensile properties. View plastic materials found under a specific property group. Thermosetting plastics or thermoset plastic are synthetic materials that strengthen during being heated but cannot be successfully remolded or reheated after their initial heatforming called as thermoset material. Such properties can be investigated and compared between different products using standardised test methods. Introduction to materials science chapter 19, thermal properties 8 thermal expansion materials expand when heated and contract when cooled t t t l l l l l l f l f.
Thermal properties of plastic materials professional plastics. It is also generally lightweight and strong and can be moulded into any shape of all sizes. Plastic material selection guide at curbell plastics author. Bridging the gap between theory and practice, it enables scientists to understand the commercial implications of their work as well as providing technologists with a theoretical background. When failures occur, they are due in part either to inferior properties resulting from poor design or badly controlled processing, or to an incomplete understanding of the properties and applications of plastics materials.
The plastic properties on pages 222223 are exclusively applicable for the specified standard test pieces. Materials scientists learn about these mechanical properties by testing materials. The material has great electrical properties as well as good mechanical strength and stability. Results from the tests depend on the size and shape of material to be tested specimen, how it is held, and the way of performing the test. Briefly defined, materials science is the study of stuff. The same can also be said for nitrogen transmission rate ntr, which rate is in regards to the amount of nitrogen that permeates per unit of area and time in a packaging mate. Understanding how materials behave in their natural state and under certain conditions will help them to understand why objects are made of specific.
1305 1097 579 1524 1196 1152 668 182 1075 1020 50 1322 1351 605 506 223 880 371 1444 969 1239 1385 544 1008 377 451 1115 305 1350 321 209 1483 553 1265 1416 297 326