Mechanism: Interacts with UV light to break down organic dirt into washable compounds.
Similar coatings: Used on modern smartphone screens (hydrophobic and oleophobic).
Glass vs Polymer
Common Exam Question: Why plastic has replaced glass in applications.
Comparison requires knowledge of properties of each material.
Advantages of Using Polymers
Lightweight: Easier for transportation.
Lower Melting Point: Easier for recycling.
Impervious to Gas: Better for carbonated drinks.
Impact Resistance: Can be squashed without breaking, enhancing safety.
Convenience: Screw tops can be used.
Advantages of Using Glass
Rigidity and Durability: More rigid and durable than thermosetting plastics.
Scratch Resistance: More resistant to scratches.
Optical Properties: Better transparency.
Heat Resistance: Not deformed by heat; suitable for heat-resistant applications.
Perception: Gives a sense of quality due to weight and visual properties.
Disadvantages of Glass
Weight: More expensive to transport.
Safety: Less safe when damaged.
Recycling: Requires a lot of energy to melt down, despite being recyclable. Although, it is proven that it requires less energy to recycle glass than to create new glass from the base components.