Metalicos Y Sinteticos Editex Pdf Free Link - Elementos

Elementos metálicos y sintéticos — reseña breve

2.1 Polymers: The Plastic Revolution

Synthetic polymers are long-chain molecules (macromolecules) derived from petroleum or natural gas. Editex classifies them into:

• Thermoplastics: Melt when heated, solidify when cooled (reversible).

  • Examples: PVC, Polyethylene (PE), Polypropylene (PP), Nylon.
  • Uses: Bottles, pipes, gears, clothing.

• Thermosets (Termoestables): Cure irreversibly with heat. Cannot be remelted.

  • Examples: Epoxy resin, Bakelite, Polyurethane.
  • Uses: Electrical insulators, adhesives, circuit boards.

• Elastomers: Rubbery materials with high elasticity.

  • Examples: Natural rubber, Neoprene, Silicone.
  • Uses: Tires, seals, gaskets.

✅ Option 4: Open Educational Resources (Free Alternatives)

Since the specific PDF is not legally free, here are equivalent free textbooks on the same topic:

• "Materials Science and Engineering" by Callister (older free editions available via Internet Archive).
• YouTube channel "Sinfo FP" – complete video series on metallic and synthetic elements.
• OpenCourseWare (MIT 3.032x) – free lecture notes on mechanical properties.

3. Environmental Impact (Ecología)

Editex textbooks usually emphasize the environmental aspect:

• Recycling Metals: Metals are 100% recyclable without losing properties. This saves energy and mining resources.
• Recycling Plastics: Difficult due to the variety of types. Separation is key.
  • 3 Rs: Reduce, Reuse, Recycle.
  • Bioplastics: New plastics made from renewable sources (like corn starch) that are biodegradable.

For Metallic Elements:

• Casting (Fundición): Sand casting, die casting, investment casting.
• Forming (Conformado): Forging, rolling, extrusion, drawing.
• Machining (Mecanizado): Turning, milling, drilling, grinding.
• Joining (Unión): Welding (SMAW, MIG/TIG), soldering, riveting.