What Causes A Rubber Band To Stretch

When you let go of the rubber band the polymer molecules break out of the crystals.

What causes a rubber band to stretch.

Whenever molecules break out of crystals they absorb heat hence the reason the rubber band now goes cold. Rubber bands are made of natural rubber. Rubber in fact is blessed with the unique ability to stretch to different sizes and come back easily to its original shape and size mostly. Most rubber bands are manufactured out of natural rubber or especially at larger sizes elastomer and are sold in a variety of sizes.

You want the rubber band to visibly stretch out when you hang the quarters from it but not so much that it hits the bottom of the bottle. The appropriate fix depends on how much extra room you need. If you give rubber bands more heat energy they will continue to shrink increasing their entropy while exposing them to cold will cause them to loosen stretch and expand. A rubber band also known as an elastic band gum band or lacky band is a loop of rubber usually ring shaped and commonly used to hold multiple objects together the rubber band was patented in england on march 17 1845 by stephen perry.

In this case the linear function fitting the straight part of the data gives a spring constant of 17 38 n m. This will cause the polymers to stretch and the rubber band to lengthen. Rubber is a member of a larger class of materials called elastomers and it is difficult to overestimate their economic and. This can be repeated many times with no apparent degradation to the rubber.

Leaving rubber out in the sun too long can cause the polymers and plasticizers to deteriorate causing that bounce back aspect of rubber to disappear. You want the band to be bigger but the rubber section of the band has been treated to stretch and then return to its original size. There is something else that makes rubber stretchy and that is called cross linking. Elastic can be stretched in several ways.

It can be stretched by up to a factor of 10 from its original length and when released returns very nearly to its original length. And this particular property is pretty evident in rubber bands that can be stretched to as big a size as possible and can return back to their original shape and size when let loose. The properties that make an elastic band a useful item can also be annoying when the elastic is too tight. Next if you take a hair dryer and heat the rubber band the heat will cause the polymers to want to coil back up and you can watch the rubber band then shrink and pull the weight back up a little bit.

After you get the rubber band stretched just a little bit it is very spring like. Finally the polymers and molecules in rubber prefer to be warmed up to have maximum flexibility and resilience so stretching rubber out in cold weather can sometimes be dangerous. Most rubber objects are made of some kind of cross.