|Statement||K.V. Gotham and M.C. Hough.|
|Contributions||Hough, M. C., Rubber and Plastics Research Association.|
Thermoplastics are a class of polymers that can be softened and melted by the application of heat, and can be processed either in the heat-softened state (e.g. by thermoforming) or in the liquid state (e.g. by extrusion and injection molding). Table displays the expected consumption of the major thermoplastics in for the three main. High temperature thermoplastic resins are generally classified by a continuous use temperature (CUT) or relative thermal index (RTI) of greater than °C. These temperatures are considered to be the maximum useful service temperature for materials where a critical property will not be unacceptably compromised through thermal degradation. Offers coverage of all known commodity, transitional, engineering, high-temperature and high-performance thermoplastics, and analyzes emerging developments in the creation of new thermoplastics. The text examines: important issues in the field for each substance discussed, including history, development and commercialization; polymer formation mechanisms and 4/5(2). ical properties (such as strength, stiffness, and toughness) depend on the molecular A Melting Point and Glass Transition Temperature /plastic/high temperature thermoplastic) Brittle polymer (Glassy polymer/low temperature thermoset) Figure A
Thermoplastic elastomeric (TPE)-materials and their use in outdoor electrical insulation 15 k(& 3SeP]RTSEcdSh5T]cTa5A!cS Rev. 29 () Corresponding author: Salman Amin, e-mail: [email protected] THERMOPLASTIC ELASTOMERIC (TPE) MATERIALS AND THEIR USE IN OUTDOOR ELECTRICAL INSULATION Salman Amin1 and Cited by: High temperature thermoplastic compounds offer significant retention of physical properties, along with dimensional stability and excellent electrical characteristics, at increased temperatures. RTP Company develops these compounds to your specifications; each may be modified for flame retardance, wear resistance, conductivity, structural. 1 Material Properties of Plastics Formation and Structure The basic structure of plastics (or polymers) is given by macromolecule chains, formulated from monomer units by chemical reactions. Typical reactions for chain assembling are polyaddition (continuous or step wise) and condensation polymer-ization (polycondensation)  (Figure ). Semicrystalline thermoplastics are composed of crystalline regions and amorphous regions. For flow to occur in these polymers, their temperature must be above the crystalline melting point T m, as shown in Fig. , which is the temperature at which all of the crystalline regions have disappeared (Stevens, ).Semicrystalline thermoplastics will generally have a T g .
1. Type of polymer materials used, thermoplastic or thermoset. 2. If thermoplastics: the temperature which it softens (Thermoplastics can be recycled) - Above T g for amorphous - Above melting temperature for semicrystalline 3. The atmospheric stability of the material being formed 4. Geometry and size of the finish product. Processing of PolymersFile Size: 1MB. MATERIAL SELECTION GUIDE 3. COMPARE THE MECHANICAL PROPERTIES IS TENSILE STRENGTH (RESISTANCE TO BEING PULLEDAPART) IMPORTANT? AMORPHOUS THERMOPLASTICS Tensile strength - pull apart (psi) •Ultem® 15, •Polysulf •Radel R® 10, •Acry •Noryl® 9, •Polycarbonate 9, •PETG 7, •PVC . TPO sheet can be laminated with decorative and paint films achieves the durability and aesthetics required to maintain the high quality surface in applications where scratch and mar resistance is critical. Our extruded TPO sheet is ideal for thermoformed parts used in demanding applications such as: Household appliances. ing of thermoplastics is reversible, and, by simply reheating to the process temperature, the resin can be formed into another shape if desired. Thermoplastics, although generally inferior to thermoses in high-temperature strength and chemical stability, are more resistant to cracking and impact damage. However, it should be noted.