Polymers can be categorized based on their origin and structure:

Based on Source:

Natural Polymers: Derived from natural sources, such as cellulose, proteins, and natural rubber.
Synthetic Polymers: Man-made through chemical processes, including polyethylene, PVC, and nylon.
Based on Structure:

Linear Polymers: Have a straight-chain structure.
Branched Polymers: Contain some branching of monomer units.
Crosslinked Polymers (Network Polymers): Form a three-dimensional network structure.
These categories help classify polymers and understand their properties and applications.