kJ/m ² … Bending modulus of different fiber-reinforced polypropylene composites ([FRPCs] data from Refs 131, 133, 125, 135, 124, 116, 82, 92 and 58). Polypropylene is an economical material that offers a combination of outstanding physical, chemical, mechanical, thermal and electrical properties not found in any other thermoplastic. Items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from PS. Polypropylene also demonstrates excellent chemical Figures - … Among these and many other great properties, polypropylene is easily fabricated. Polypropylene is one of those most versatile polymers available with applications, both as a plastic and as a fibre, in virtually all of the plastics end-use markets Code 7 is used to designate miscellaneous types of plastic … It offers a great combination of properties such as lightweight, strong, high heat resistance, as well as stiffness and flexural retention. Polypropylene has very good mechanical properties which result from regular structure and molecular weight distribution. PP, like polyethylene (see HDPE, L/LLDPE) and polybutene (PB), Polypropylene is a polyolefin or saturated polymer. Dielectric strength depends on the temperature and the wall thickness of an item. Properties Polyethylene Polypropylene Polyvinyl chloride Cellophane Max. Polypropylene Natural PPH / PP-DWST - Homopolymer Colour: Natural Density: 0.905g/cm³ Mechanical Properties Value Unit DIN/EN/ISO Tensile strength at yield 30 MPa 527/D638 Elongation at yield 8 % 527 Modulus of elasticity in tension 1600 MPa 527/D638 Impact strength No br. Polypropylene is a good insulator with very low dielectric constant and low dissipation factor. Automotive Applications: Polypropylene is widely used in automotive parts because of its low cost, weldability, and mechanical properties. Polystyrene is commonly recycled, but is difficult to do. Material Properties of Plastics 1.1 Formation and Structure The basic structure of plastics (or polymers) is given by macromolecule chains, formulated from monomer units by chemical reactions. This combination of performance properties gives polypropylene a position in the injection molding field that is unique among thermoplastics. It can mostly be found in battery cases and trays, bumpers, fender liners, interior trim, instrumental panels and door trims. Polypropylene is a very versatile material. Compared to low or high density polyethylene, it has a lower impact strength, but superior prescription bottles. Plastic bottle caps are often made from PP. Polypropylene fibre is a major factor in home furnishings such as upholstery and indoor-outdoor carpets. Polypropylene (PP) is a linear hydrocarbon polymer, expressed as CnH2n. Typical reactions for chain assembling are polyaddition (continuous or step wise) and condensation polymer-ization (polycondensation) [1] (Figure 1.1).. 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