Based on the diagram of this chemical reaction, the product that is formed in this reaction is a polymer.
A polymer can be defined as a class of synthetic substances which comprise very large molecules (macromolecules) that are typically formed by chemically bonding a series of repeating subunits (building blocks) known as monomers.
In this scenario, a polymer polystyrene was formed by chemically bonding a series of monomer styrene, while using an organic peroxide (ROOR) to initiate a radical formation as shown in the image attached below.
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