Catalysts can significantly improve the properties of polymers by: 1. Enhancing Chemical Resistance: Catalytic processes can introduce functional groups that make the polymer more resistant to chemical attack. 2. Improving Mechanical Strength: Catalysts can promote cross-linking, which increases the rigidity and strength of the polymer. 3. Increasing UV Resistance: By aiding in the incorporation of UV-stabilizing agents, catalysts can improve the polymer's resistance to UV-induced degradation.