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Homework 2 - PTFE 2200 Homework 2 Laura Hughey 1 Composites...

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PTFE 2200 Homework 2 Laura Hughey 1. Composites are used in automobiles, aircraft, bikes, and boats. The primary constituents of a composite are fibers and a matrix material. 2. Top 10 Consumption Sectors for Plastics Packaging Building Transport Electrical Furniture Housewares Agriculture Mechanical Engineering Toys/Leisure Clothing 3. About 4% of petroleum worldwide is used to make plastics whereas about 55% of petroleum is used in transportation. 4. Plastic packaging in the developed world leads to low wastage (less than 2%) whereas in the undeveloped world about 50% of the food produced becomes rotten. Plastic packaging also improves food hygiene. 5. Plastics play a key role in transportation. The lightness of plastics in the making of cars results in a lighter vehicle, which allows for less fuel and lower emissions. Plastics contribute to safety inside the car due to aerodynamic fittings such as front air dams and rear spoilers. The plastic air intake manifold, which used to be made from aluminum, now weights half as much and improves engine performance. The energy consumed in
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