English: Hydrogen bonding in nylon 6-6. The nylon fibers are relatively resistant to damage because their long-chain molecules have stronger inter-molecular forces than the Van der Waals bonds between polyethylene chains. Indeed, each N—H group in a nylon chain can hydrogen-bond to the O of a C=O group in a neighboring chain, as shown above. Therefore, the chains cannot slide past one another easily ChemPRIME Staff (2010), Condensation Polymers, chemeddl.org.