The polymer containing strong intermolecular forces e.g. hydrogen bonding, is:

Nylon 6,6 is a polyamide. It contains amide linkages ($-\text{CO}-\text{NH}-$). The hydrogen atom of the $-\text{NH}$ group in one polymer chain can form hydrogen bonds with the oxygen atom of the $-\text{CO}$ group in an adjacent chain, leading to high tensile strength and fiber-forming properties.