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Different between vulcanized rubber and natural rubber?

Vulcanized rubber is process that changes the properties of natural rubber so that it is more usable for products. Natural rubber hardens rock-solid in freezing temperature and melts into goo in summer heat. For an interesting reprint of a Readers Digest article on the invention of rubber - see the attach link.


When does rubber melt?

It doesn't. Tire rubber (and rubber in general) has vulcanized properties that keep it from melting. The only way you can accuire melted rubber is to have it ordered form somewhere that sells it.


How is vulcanized rubber different to rubber?

Vulcanized rubber is rubber that has undergone a chemical process called vulcanization, which involves adding sulfur and heating the material. This process enhances the rubber's elasticity, strength, and durability, making it more resistant to temperature changes, aging, and wear. In contrast, untreated rubber is softer, more prone to degradation, and less stable under varying environmental conditions. Overall, vulcanization significantly improves the performance and longevity of rubber products.


Why are pieces of rubber placed between slabs of concrete?

Concrete expands and contracts depending on the temperature. The strips are called expansion joints.


Why is a plug cable casing made from rubber?

A plug cable casing is made from rubber primarily for its excellent insulation properties, which prevent electrical shocks and protect users from electrical hazards. Rubber is also flexible and durable, allowing the cable to withstand bending and movement without breaking. Additionally, rubber provides resistance to environmental factors such as moisture and temperature fluctuations, enhancing the longevity and safety of the cable.