1. Injection Molded Plastic By: Dan Quates Material science 3344

2. Injection Molding Injection Molding is the most widely used technique for fabricating thermoplastic materials because it can mass produce parts for relatively low costs. Melted plastic is pressurized and forced into a prefabricated mold. There, it is allowed to cool and will take the shape of the mold as it solidifies.

3. Thermoplastics used in Injection Molding Polyethylene Polypropylene Polystyrene Poly(vinyl chloride)

4. Polyethylene Polyethylene is used for everything – Grocery bags – Bottles It’s structure is [-CH2-CH2-] Not good for high heat applications

5. Polypropylene Polypropylene is not as versatile Can be used as a plastic or fiber It’s used mostly for applications like outdoor carpet Also used for dishes

6. Polystyrene Polystyrene is a vinyl polymer It has a phenyl group every other carbon atom In plastic form it’s used for computer shells In foam form it’s commonly used for packing boxes

7. Poly(vinyl chloride) Pvc is used for plumbing in homes Can withstand fire and water The chlorine atoms will inhibit combustion

8. References Callister, Material Science and Engineering, 6 th edition School of Polymers and High Performance Materials, The University of Southern Mississippi URL: http://www.psrc.usm.edu/index.html AA/EOE/ADAI School of Polymers and High Performance Materials The University of Southern Mississippi