Toughness enhancement of polyamide 6, 12 with intermolecular hydrogen bonding with 3‐pentadecylphenol. Issue 28 (9th May 2022) - Lu, Jing
Abstract: Due to the brittle performance of polyamide 6, 12 (PA6, 12) in high impact environment, we report a facile, efficient, and scalable method to toughen PA6, 12 by establishing intermolecular hydrogen bonding (H‐bonding) interaction with 3‐pentadecylphenol (PDP). Interestingly, the intermolecular H‐bonding interaction obviously hindered PA crystallization, which was evidenced by decrease of crystalline temperature from 186.8 to 175.8°C and prolong of crystallization half‐time from 0.27 to 0.37 min, when the amount of PDP was increased to 30 wt%. Consequently, the toughness of the PA6, 12/PDP composites containing 30 wt% PDP was improved and their notched impact strength reached to 17.5 kJ m −2, about three times higher than that of the neat PA6, 12. It was deduced that both plasticizing effect and intermolecular H‐bonding interaction played critical roles in PA6, 12 resultant composites toughness, which opens a new perspective of PA6, 12 toughening for a wide range of applications. Abstract : We report a facile, efficient, and scalable method to toughen PA6, 12 by establishing intermolecular hydrogen bonds (H‐bonds) with 3‐pentadecylphenol (PDP). As a result of intermolecular H‐bonding establishment and plasticizing effect, the notched impact strength of PA6, 12/PDP composites reached to 17.5 kJ m −2, about three times higher than that of the neat PA6, 12.