Bending modulus of different fiber-reinforced polypropylene composites ([FRPCs] data from Refs 131, 133, 125, 135, 124, 116, 82, 92 and 58). Polypropylene is a very versatile material. This combination of performance properties gives polypropylene a position in the injection molding field that is unique among thermoplastics. Polypropylene also demonstrates excellent chemical It can mostly be found in battery cases and trays, bumpers, fender liners, interior trim, instrumental panels and door trims. Polypropylene has very good mechanical properties which result from regular structure and molecular weight distribution. Dielectric strength depends on the temperature and the wall thickness of an item. Code 7 is used to designate miscellaneous types of plastic … Polypropylene is a good insulator with very low dielectric constant and low dissipation factor. Polystyrene is commonly recycled, but is difficult to do. It offers a great combination of properties such as lightweight, strong, high heat resistance, as well as stiffness and flexural retention. Numerous industrial end uses exist as well, including rope and cordage, disposable nonwoven fabrics for diapers and medical applications, and nonwoven fabrics for ground stabilization and reinforcement in construction and road paving. 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. Figures - … Polypropylene is highly responsive to injection speed and pressure and sets up quickly in the mold, enabling molders to attain high production rates. 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. PP, like polyethylene (see HDPE, L/LLDPE) and polybutene (PB), Polypropylene is a polyolefin or saturated polymer. Plastic bottle caps are often made from PP. kJ/m ² … Typical reactions for chain assembling are polyaddition (continuous or step wise) and condensation polymer-ization (polycondensation) [1] (Figure 1.1).. Automotive Applications: Polypropylene is widely used in automotive parts because of its low cost, weldability, and mechanical properties. heat tolerance (°C) 82-93 132-149 66-93 90-140 Min. Among these and many other great properties, polypropylene is easily fabricated. prescription bottles. Compared to low or high density polyethylene, it has a lower impact strength, but superior Properties Polyethylene Polypropylene Polyvinyl chloride Cellophane Max. Items such as disposable coffee cups, plastic food boxes, plastic cutlery and packing foam are made from PS. 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