Why Materials Can Be Stretched?

Because these polymers are so long (they can be thousands of molecules long) they get tangled up in themselves. The result is a property called elasticity, the polymers are elastic. ... Most plastic materials have some elasticity, but the amount the material will stretch depends on the type of polymer and length, etc.

Which materials can be streched?

Stretch fabric is a cloth which has the ability to stretch. It is made partially of elastic fibers such as lycra, elastane, spandex (different names of the same synthetic fiber). There are also knit fabrics which stretch due to the production method – looping.

Why does some materials Cannot be stretched?

Most materials have an amount of force or pressure for which they deform elastically. ... Materials that can't stretch or bend much without breaking are said to be brittle. Copper is quite ductile, which is part of why it is used for wires (most metals are ductile (but copper especially so).