The structure of silicone rubber is a common problem. Foreign silicone giants already have good solutions for their products, while domestic manufacturers not only lack basic research, but also because their concepts are different from those of other giants, they always hope to create a "divine oil" that can be easily, conveniently, and low-cost solved by adding a little.

I have thought about it myself, that is, to develop an effective auxiliary agent, hoping to solve this problem and make some quick money by selling auxiliary agents. Therefore, in 2010, I posted a help post on the forum: How to quickly test the structure of rubber blends? I have received warm help from many friends. Later, it was discovered that many people have a structured rapid testing requirement for silicone rubber.

After some effort, so far, no so-called "divine oil" has been found. Subsequently, I turned my attention to the treatment of white carbon black. As a result, we have a deeper understanding of the structural phenomenon of silicone rubber.

In my opinion, the reason why silica leads to the structure of silicone rubber is mainly based on the huge hydrogen bond interaction between silica and high molecular weight polysiloxanes. This conclusion has long been reached, and I just added the word "huge".


The thixotropic contribution of silica to silicone rubber (including coating systems in coatings) is mainly based on the interaction between silica and silica.

As a result, the problem is simplified:


Structured: The interaction between silica and silicone rubber (massive hydrogen bonds), and the entanglement of polysiloxane polymer chains. The result of the combination of these two effects

Thixotropy: due to the interaction between white carbon black and white carbon black, hydrogen bonding, and van der Waals force