What is the trade name of polyacrylonitrile?

Explanation

To answer the question "What is the trade name of polyacrylonitrile?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Polymer**:
- We start by recognizing that polyacrylonitrile is a type of polymer.

2. **Understand the Monomer**:
...