Quick Answer
Polymers are large molecules made of repeating units found in everything from plastic bottles to DNA. They’re used in manufacturing, medicine, and even home repairs because they’re strong, flexible, and easy to shape.
Key Takeaways
- Always check if a plastic is recyclable by looking for resin codes (1–7) on the bottom
- Store polymer-based products away from direct sunlight to prevent degradation
- Use clamps or rubber bands when gluing to keep pieces aligned
- Manufacturing lightweight car and aircraft parts
- Creating waterproof clothing and food packaging
Troubleshooting & Solutions
Common Problems & Solutions
Why this happens
Plastics (polymers) can degrade due to UV exposure, heat, or physical stress, causing brittleness and cracking over time.
How to fix it
- 1Clean the broken surfaces thoroughly with soap and water
- 2Apply a polymer-based adhesive like epoxy or super glue designed for plastics
- 3Clamp or hold the pieces together while the glue cures (follow drying time on label)
Mistakes to avoid
- Using water-based glue—it won’t bond well to non-porous plastics
- Ignoring surface preparation—dirt or oil prevents proper adhesion
Frequently Asked Questions
The most common are thermoplastics like polyethylene (plastic bags), polypropylene (containers), and polystyrene (foam cups). These can be melted and reshaped.
Sources & References
- [1]Polymer — Wikipedia
Wikipedia, 2026