The role of zinc stearate in the process of vulcanisation is

Options

A. to accelerate the process
B. to slow down the process
C. to stop the process
D. to initiate the process

Answer

**Step-by-Step Solution:**

1. **Understanding Vulcanization**:
- Vulcanization is a chemical process that involves the addition of sulfur to rubber to improve its properties. This process makes rubber more durable, elastic, and heat-resistant.

2. **Role of Zinc Stearate**:
- Zinc stearate is a compound that serves multiple functions in the vulcanization process. It acts as a lubricant and a thickening agent.

3. **Effects of Zinc Stearate**:
- As a lubricant, zinc stearate helps in the processing of rubber by reducing friction, which can lead to a smoother mixing of ingredients.
- It also acts as an accelerator in the vulcanization process, meaning it speeds up the reaction between sulfur and rubber.

4. **Conclusion**:
- Given the options provided (to accelerate, slow down, stop, or initiate the process), the correct role of zinc stearate in vulcanization is to **accelerate the process**.

5. **Final Answer**:
- The correct answer is **to accelerate the process**.

---