Toughness enhancement of polyamide 6,12 with intermolecular hydrogen bonding with 3‐pentadecylphenol

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.

Enhancing Mechanical Performance of High-Density Polyethylene at Different Environmental Conditions with Outstanding Foamability through In-Situ Rubber Nanofibrillation: Exploring the Impact of Interface Modification

“…74,75 Finally, it is important to note that, in this study, a significant amount of energy dissipation can be attributed to the decohesion of the matrix from highspecific-surface-area rubber nanofibrils at the interface when strong adhesion in the presence of the compatibilizer exists between the two components. 76,77 Notably, while the enhancement in elongation at break for compatibilized nanofibrillar composites is considerably more pronounced compared to noncompatibilized nanofibrillar and compatibilized spherical samples, it is noteworthy that the results for the latter two exhibit a close resemblance, albeit with a slightly greater improvement observed in the noncompatibilized samples. While neat HDPE exhibited a high elongation at break at room temperature, the in situ nanofibrillation process, coupled with the enhancement of the interface between the two components, resulted in a notable improvement in elongation at break under these conditions.…”

Molecular dynamics simulation of the 3–15alkyphenol compatibilizer in highly toughened and robust polyamide 10,12/MWCNT composites

“…The PDP ratio was optimized since a higher impact strength for composites was achieved in our previous work. 17 Next, the ternary PA10,12/PDP/MWCNTs composites were prepared with various amounts of MWCNTs containing 0.8, 1.5, 2 and 2.5 wt%, respectively. Based on the MWCNT loading, all the ternary composites are denoted as PA/PDP/CNT+ X , in which X refers to the amount of CNT.…”

“…Wang et al 16 exploited H-bonds between nano-calcium whiskers and PA10,12 to effectively improve B30% the composite's tensile strength due to stress transfer enhancement. In our previous work, 17 we incorporated 30 wt% 3-pentadecylphenol (PDP) to tailor intermolecular H-bonds between PA6,12 and PDP, and the impact strength of the PA composite significantly enhanced to 17.5 kJ m À2 , whereas its tensile strength was dramatically decreased to 32 MPa.…”