Plasticine has an interesting history. Its full name is "Dow Corning 3 179 Extended Complex", written by James? Wright found it at 1943. Wright tried to study a method of making artificial rubber. He tried to mix boric acid with silicone oil, and then he got something that could stretch and rebound more than natural rubber. The problem is that no one can find its use.

But a few years later, after an advertising manager heard about it, he discovered its potential as a toy, and plasticine quickly caused a sensation. It was even used in apollo 8's space capsule to prevent tools from flying around in the spaceship. Now answer the question: one of the components of plasticine is a polymer of dimethyl silicone oil, and this polymer is composed of long-chain molecules-think of spaghetti. Adding boric acid will make the molecules connect with each other at different points, transforming the liquid polymer into a solid compound.

The link of dimethyl silicone oil in plasticine is not so close, so plasticine is not fragile and will not be broken by a hammer, but it will be punctured by slight pressure. The problem is that no one can find its use. But a few years later, an advertising manager heard about this thing. He found its potential as a toy, and plasticine soon became a moving thing. It was even used in the capsule of the apollo 8 space mission to stop flying in the spacecraft.

Now to answer your question: one of the components of plasticine is a polymer of dimethyl silicone oil, and this poly-4 is composed of long-chain molecules-think of spaghetti. Adding boric acid will make the molecules connect with each other at different points, transforming the liquid polymer into a solid compound. Dimethyl silicone oil is so closely linked in plasticine that plasticine is not fragile and will not be broken by a hammer, but it will be punctured by slight pressure.